Relevant bibliographies by topics / Surfaces – Erosion

Academic literature on the topic 'Surfaces – Erosion'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Surfaces – Erosion"

1

Adamkiewicz, A., and A. Waliszyn. "Studies of Erosion Resistance of Protective Coats on the Surfaces of Machine Elements Washed with Fluids." Advances in Materials Science 18, no. 2 (June 1, 2018): 69–76. http://dx.doi.org/10.1515/adms-2017-0033.

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AbstractThis article indicated at erosion as one of the causes of degradation of surfaces washed by fluids and conditions of its occurrence. Corrosive – erosive theory of metal surface degradation has been discussed linking it with an instance of destructive processes taking place in cylinder liner blocks of combustion engines. Physics and conditions influencing processes on liquid – washed operational surface phase boundary have been justified. Out of the contemporary hypotheses explaining the physics of cavitation erosion, the bubble theory has been considered. A mathematical model of erosion has been presented in the context of cavitation implosion energy determining crash interactions of liquid cumulative fluxes on the washed surface. Occurring plastic deformations have been graphically explained linking them with the occurrence of fatigue micro-cracks and later with erosive pits. Influence of initial steel hardness on intensity of cavitation erosion has been checked. Discussion of ways to increase metal surface resistance to cavitation erosion has been carried out.
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Oberholzer, P., C. Baroni, M. C. Salvatore, H. Baur, and R. Wieler. "Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes." Antarctic Science 20, no. 1 (November 27, 2007): 89–98. http://dx.doi.org/10.1017/s095410200700079x.

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AbstractWe present 21Ne exposure ages of erosional glaciogenic rock surfaces on nunataks in northern Victoria Land, Antarctica: i) in the Prince Albert Mountains and ii) near Mesa Range. These nunataks are located directly at the margin of the polar plateau and therefore provide an immediate record of ice volume changes of the East Antarctic Ice Sheet, not biased by ice shelf grounding or narrow valley sections downstream the outlet glaciers. The sampling locations overlook the present ice surface by less than 200 m, but were last covered by ice 3.5 Ma bp (minimum age, not corrected for erosion). This strongly indicates that the ice sheet has not been substantially thicker than today since at least the early Pliocene, which supports the hypothesis of a stable East Antarctic Ice Sheet. First absolute ages are reported for the alpine topography above the erosive trimline that typically marks the upper limit of glacial activity in northern Victoria Land. Unexpectedly low nuclide concentrations suggest that erosion rates on the alpine topography are considerably higher due to the steep slopes than those affecting flat erosional surfaces carrying Antarctic tors.
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Kinnell, PIA, CJ Chartres, and CL Watson. "The effects of fire on the soil in a degraded semiarid woodland .II. Susceptibility of the soil to erosion by shallow rain impacted flow." Soil Research 28, no. 5 (1990): 779. http://dx.doi.org/10.1071/sr9900779.

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Small (500 by 250 by 100 mm) soil monoliths collected from experimental plots subjected to various fire frequencies in a semi-arid woodland near Coolabah, N.S.W., were tested for their susceptibility to erosion by rain-impacted flows under laboratory conditions. In the tests, the erosive stress applied to the soil surfaces was controlled by using drops of uniform size (2.7 mm) falling 11.2 m onto flows whose depths were controlled between 1 and 2.7 drop diameters. Experimental data and thin-section observations showed that cryptogams provide a high degree of protection against erosion. Sediment concentration (measured in g L-1) from cryptogam-covered plots was considerably less than that from both bare-crusted surfaces and surfaces dominated by depositional material. Surfaces with cryptogamic crusts were generally free of debris, but showed only minor signs of erosion, whereas bare-crusted and depositionary surfaces suffered pronounced lowering and tended to disintegrate. Because increasing fire frequency reduces the spatial distribution of the cryptogamic cover on the soil surface in the semi-arid woodlands, increasing fire frequency must increase the erosion hazard.
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Srinivasan, Sreeram, John C. Russ, and Ronald O. Scattergood. "Fractal analysis of erosion surfaces." Journal of Materials Research 5, no. 11 (November 1990): 2616–19. http://dx.doi.org/10.1557/jmr.1990.2616.

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Fractal analysis of steady-state erosion surfaces generated by erodents of widely different hardnesses on single crystal sapphire shows surprising similarities in spite of a large difference in erosion rates and single impact morphology. This study quantifies the surfaces in terms of the surface texture measurements using recently developed image analysis techniques. The interpretation for such similarities is that a single mechanism of material removal is operative for all erodents. The differences are explained in terms of the efficiency of crack initiation in the target by the two erodents.
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Selokar, Ashish, Ravi Kant, D. B. Goel, and U. Prakash. "Solid Particle Erosion Behaviour of Martensitic and Nitrogen Alloyed Austenitic Stainless Steel." Advanced Materials Research 1043 (October 2014): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1043.45.

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In the present work, comparison of solid particle erosive behaviour of 13/4 steel and Nitrogen alloyed austenitic stainless steel (23/8N steel) have been studied using air jet erosion testing. Air jet erosion testing has been performed at various angles for as received samples at 31 m/s velocity and a discharge rate of 3 gm per minute by alumina particles with angular shape and 53-63μm size. Microstructure, eroded surface characteristics, mechanical properties and erosion rate are characterized by using scanning electron microscope, hardness and tensile testing. 23/8N steel shows good hardness coupled with high tensile toughness and work hardening ability, which leads to improved erosion resistance. The surface morphology analysis of the worn out surfaces, cumulative weight loss measurements and steady state of erosion rate results were used to understand the effect of nitrogen on the degradation mechanisms. The results show that 23/8N steel exhibits excellent resistance to erosion in comparison to13/4 steel.
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Erdoğan, Aygen A., Erol Feyzullahoğlu, Sinan Fidan, and Tamer Sinmazçelik. "Investigation of erosive wear behaviors of AA6082-T6 aluminum alloy." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 3 (January 14, 2020): 520–30. http://dx.doi.org/10.1177/1464420719899686.

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AA6082-T6 aluminum alloys are widely used in various applications in automotive and aircraft industries. They offer an attractive combination of surface properties, strength and corrosion resistance. The structural components manufactured by AA6082-T6 aluminum alloys can be exposed to impingement of solid particles throughout their service life. In this study, erosive wear behaviors of AA6082-T6 aluminum alloy were investigated. For the evaluation of erosive wear induced by solid particle impacts, a detailed study was conducted on AA6082-T6 aluminum alloy by using aluminum oxide (Al2O3) erodent particles. Two different particles were used in solid particle erosion tests, which are 60 mesh (212–300 µm) and 120 mesh (90–125 µm), respectively. Also, the aluminum alloy samples were tested under two different air pressures (1.5 bar and 3 bar). The erosive wear tests were carried out according to ASTM G76 standard at six various impact angles (15°, 30°, 45°, 60°, 75°, 90°). The surface roughness and morphology of worn samples were analyzed by using a non-contact laser profilometer. It was found that erodent particle size affected the surface erosion damage, erosion rate, crater morphology and roughness. The eroded surfaces of specimens were analyzed by SEM. The surfaces of specimens were also investigated by using EDS in SEM studies.
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Chen, Shanqun, Runchao Tang, Longzhu Zhang, and Bin Liao. "Numerical Investigation of Wind Erosion to the Grooved Concrete Wall Surface under a Wind-Blown Sand Movement." Advances in Materials Science and Engineering 2021 (January 19, 2021): 1–13. http://dx.doi.org/10.1155/2021/1604186.

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Wind erosion to the grooved concrete wall surface under a wind-blown sand movement was numerically studied. Particularly, the influencing factors that affect the wind erosion to the grooved concrete wall surface were systematically investigated by using the RNG k − ε turbulence model combined with the discrete phase model (DPM). It was found that, under a relatively low impact angle, the damage mechanism to the grooved wall surface is wind-blown sand impact, and the erosion rates of the grooved wall surfaces are higher than those of the smooth wall surfaces. By contrast, under a relatively high impact angle, the damage mechanism to the grooved wall surface transfers to the microcutting effect, and the erosion rates show an opposite trend. The optimization rates between the erosion of grooved and smooth wall surfaces increase with increasing groove size or groove number. However, the damage mechanism to the grooved wall surface is hardly changed by expanding the groove area. The erosion rate distribution and the optimization rates of the groove wall surfaces are not significantly changed by adjusting the spacing between the grooves alone. When the groove shape changes from semicircular to rectangular, the erosion rate distribution is significantly changed, and the wear resistance of the changed grooved wall surface gets better.
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Mohammadi, Bijan, and AmirSajjad Khoddami. "Representative volume element-based simulation of multiple solid particles erosion of a compressor blade considering temperature effect." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 8 (November 1, 2019): 1173–84. http://dx.doi.org/10.1177/1350650119884825.

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Solid particle erosion is one of the main failure mechanisms of a compressor blade. Thus, characterization of this damage mode is very important in life assessment of the compressor. Since experimental study of solid particle erosion needs special methods and equipment, it is necessary to develop erosion computer models. This study presents a coupled temperature–displacement finite element model to investigate damage of a compressor blade due to multiple solid particles erosion. To decrease the computational cost, a representative volume element technique is introduced to simulate simultaneous impact of multiple particles. Blade has been made of Ti-6Al-4V, a ductile titanium-based alloy, which is impacted by alumina particles. Erosion finite element modeling is assumed as a micro-scale impact problem and Johnson–Cook constitutive equations are used to describe Ti-6Al-4V erosive behavior. In regard to a wide variation range in thermal conditions all over the compressor, it is divided into three parts (first stages, middle stages, and last stages) in which each part has an average temperature. Effective parameters on erosive behavior of the blade alloy, such as impact angle, particles velocity, and particles size are studied in these three temperatures. Results show that middle stages are the most critical sites of the compressor in terms of erosion damage. An exponential relation is observed between erosion rate and particles velocity. The dependency of erosion rate on size of particles at high temperatures is indispensable.
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Khan, Rehan, Hamdan H. Ya, William Pao, and Armaghan Khan. "Erosion–Corrosion of 30°, 60°, and 90° Carbon Steel Elbows in a Multiphase Flow Containing Sand Particles." Materials 12, no. 23 (November 26, 2019): 3898. http://dx.doi.org/10.3390/ma12233898.

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Erosion–corrosion in flow changing devices as a result of sand transportation is a serious concern in the hydrocarbon and mineral processing industry. In this work, the flow accelerated erosion–corrosion mechanism of 90°, 60°, and 30° long radius horizontal–horizontal (H–H) carbon steel elbows with an inner diameter of 50.8 mm were investigated in an experimental closed-flow loop. For these geometrical configurations, erosion–corrosion was elucidated for erosive slug flow regimes and the extent of material degradation is reported in detail. Qualitative techniques such as multilayer paint modeling and microscopic surface imaging were used to scrutinize the flow accelerated erosion–corrosion mechanism. The 3D roughness characterization of the surface indicates that maximum roughness appears in downstream adjacent to the outlet of the 90° elbow. Microscopic surface imaging of eroded elbow surfaces disseminates the presence of corrosion pits on the exit regions of the 90° and 60° elbows, but erosion scars were formed on the entry regions of the 30° elbow. Surface characterization and mass loss results indicated that changing the elbow geometrical configuration from a small angle to wide angle significantly changed the mechanical wear mechanism of the tested elbows. Moreover, the maximum erosive location was identified at the top of the horizontally-oriented elbow for slug flow.
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Wadsworth, Jennifer A., and Roger G. Walker. "Morphology and origin of erosion surfaces in the Cardium Formation (Upper Cretaceous, Western Interior Seaway, Alberta) and their implications for rapid sea level fluctuations." Canadian Journal of Earth Sciences 28, no. 10 (October 1, 1991): 1507–20. http://dx.doi.org/10.1139/e91-135.

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The morphology of three basin-wide erosion surfaces has been defined using 7869 resistivity well logs, over an area of about 50 000 km2. The lowest of these, designated E6, is topographically smooth, and has no incised steps or low areas. It cuts into marine mudstones, and indicates either an uninterrupted erosive transgression following a major lowering of relative sea level, or wave scouring of the substrate following a very minor lowering of sea level. Erosion surface E6.5 also cuts into marine mudstones, but its overall morphology is less well understood owing to subsequent dissection by surface E7. This surface (E7) is characterized by three strike-parallel linear low areas that die out northwestward. These linear lows are up to 40 km wide, 36 m deep, and have irregular to symmetrical cross-sectional profiles. They cut into, and are filled with, marine mudstones, and their origin is enigmatic. The differences in the morphologies of the surfaces suggest the interplay of several controlling parameters: (i) steady transgression versus transgression interrupted by stillstands; (ii) absolute depth of erosion during transgression, which in turn controls the preservation or erosion of incised river valleys; (iii) wave scouring of substrate in response to minor lowerings of sea level; and (iv) availability of coarse sediment and river gradients steep enough for its transport to the shoreline. The average time span between erosion surfaces is 300 000 – 350 000 years. This timing is hard to explain tectonically, or in terms of global eustacy, suggesting the possibility of glacio-eustatic control of fluctuations in relative sea level.
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Dissertations / Theses on the topic "Surfaces – Erosion"

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Kaye, Peter Langford. "The erosive cleaning of surfaces." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364393.

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Marques, Neto Roberto [UNESP]. "Compartimentação do meio físico, evolução morfológica e aspectos morfotectônicos em São Thomé das Letras (MG)." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/95587.

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Made available in DSpace on 2014-06-11T19:27:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-10-29Bitstream added on 2014-06-13T19:15:23Z : No. of bitstreams: 1 marquesneto_r_me_rcla.pdf: 2544757 bytes, checksum: c23c3787ee6420768ab406cae71bd6c2 (MD5)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O propósito da presente dissertação consiste na determinação de unidades de paisagem para o município de São Thomé das Letras (MG), no estudo da evolução morfológica da área e na apreciação de aspectos morfotectônicos. O cumprimento dos objetivos estipulados demandou uma série de dispositivos analíticos que se coadunaram para a interpretação da fisiologia da paisagem e para o discernimento de diferentes unidades paisagísticas representadas em documento cartográfico de síntese. O estudo da evolução morfológica demandou a avaliação de elementos do quadro genético-evolutivo regional como meio para o entendimento dos processos operantes em âmbito local. A pesquisa focalizou a ocorrência e posicionamento de diferentes superfícies de erosão na área de estudo, diferenciando remanescentes relacionados à Superfície Sul-Americana, do Terciário Inferior, de modelados de dissecação mais recentes, de idade plio-pleistocência. A esta etapa se somou, com ênfase, estudos interessados na evolução morfológica levada a efeito durante o Quaternário em consonância com as oscilações climáticas que marca o referido período, o que se deu por meio do estudo de processos de pedimentação recente e dos depósitos correlatos, da avaliação da cobertura vegetal atual e dos fenômenos cársticos operantes, também sendo estimada a evolução do relevo com enfoque na estrutura, que confere tipicidade apalachiana para a morfologia local e regional. No tocante aos aspectos morfotectônicos, a pesquisa se valeu da análise do relevo e da drenagem, enfando os fenômenos neotectônicos com base na identificação de feições morfológicas indicativas (shutter ridges, capturas, migração lateral de cursos dágua, canais fluviais com trechos excessivamente retilíneos, etc.) e na identificação e interpretação dos principais lineamentos. Os estudos morfotectônicos...
The aim of this present dissertation consists in the determination of landscape unity for the town of São Thomé das Letras (MG), in the study of the area morphological evolution and appreciation of morphotectonic aspects. The fulfilment of stipulated purpose demanded a serie of analytical device that were gathered for the comprehention of landscape phisiology as well as the understanding of different landscape unities represented in graphic-chart document of synthesis. The study of morphological evolution demanded the evaluation of components the regional genetic-evolutive chart as so as to understand the operating process in local range. The research focused the occurence and status of different erosion surface in the studied area, differenciating remainders related to Superfície Sul-Americana of low Terciary, of latest dissection molded, of plio-pleistocene age. To such stage, with emphasis, was added studies interested in the morphological evolution effectuatedduring the Quaternary in consonance with climatic fluctuations that mark the referred era, which happened by means of process study of recent pedimentation and correlated deposits from evaluation of current vegetal covering and operating carstic phenomenon, also evolution of relief beig estimated focusing the structure, that grants appalachian tipicality to regional and local morphology. Regarding the morphotectonic aspects, the research turned to the relief analisis and drainage emphasizing the neotectonic phenomena based on identification of indicative morphological features (shutter ridges, captures, water-course lateral migration, river channel with excessively right-lined streches, etc.) and identification and interpretation of main lineages. The morphotectonic studies were subsidized by measuring the geomorphic rate useful for estimating neotectonic effects, notoriously the asymmetry Factor of Drainage Basins... (Complete abstract click electronic access below)
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Thomas, Petros. "Novel optical studies of ion-erosion, growth, and diffusion on metal surfaces /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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Baugh, Nicole Faith. "Fluvial Channels On Titan." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/193368.

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We present channel length and stream order for possible fluvial channels present in Cassini Synthetic Aperture Radar (SAR) data from Ta to T19. These features are present at most latitudes observed, with the bulk of the channels located in near-equatorial latitudes. Many of them are also organized into four branching channel networks, three of third order and one of fourth order, similar to river systems on Earth and Mars. These networks appear well integrated, with few streams that are not incorporated into the higher order branches. The median channel length for all channels on Titan is 29 km, with the longest channels all being incorporated into the channel networks. Estimates of channel width and depth of 1 km and 100m respectively result in a channel volume of 1012 m3 which, when extrapolated to the entire surface of Titan results in 1013 m3 of sediment.
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Marques, Neto Roberto. "Compartimentação do meio físico, evolução morfológica e aspectos morfotectônicos em São Thomé das Letras (MG) /." Rio Claro : [s.n.], 2007. http://hdl.handle.net/11449/95587.

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Orientador: Adler Guilherme Viadana
Banca: Archimedes Perez Filho
Banca: Francisco Sérgio Bernardes Ladeira
Resumo: O propósito da presente dissertação consiste na determinação de unidades de paisagem para o município de São Thomé das Letras (MG), no estudo da evolução morfológica da área e na apreciação de aspectos morfotectônicos. O cumprimento dos objetivos estipulados demandou uma série de dispositivos analíticos que se coadunaram para a interpretação da fisiologia da paisagem e para o discernimento de diferentes unidades paisagísticas representadas em documento cartográfico de síntese. O estudo da evolução morfológica demandou a avaliação de elementos do quadro genético-evolutivo regional como meio para o entendimento dos processos operantes em âmbito local. A pesquisa focalizou a ocorrência e posicionamento de diferentes superfícies de erosão na área de estudo, diferenciando remanescentes relacionados à Superfície Sul-Americana, do Terciário Inferior, de modelados de dissecação mais recentes, de idade plio-pleistocência. A esta etapa se somou, com ênfase, estudos interessados na evolução morfológica levada a efeito durante o Quaternário em consonância com as oscilações climáticas que marca o referido período, o que se deu por meio do estudo de processos de pedimentação recente e dos depósitos correlatos, da avaliação da cobertura vegetal atual e dos fenômenos cársticos operantes, também sendo estimada a evolução do relevo com enfoque na estrutura, que confere tipicidade apalachiana para a morfologia local e regional. No tocante aos aspectos morfotectônicos, a pesquisa se valeu da análise do relevo e da drenagem, enfando os fenômenos neotectônicos com base na identificação de feições morfológicas indicativas (shutter ridges, capturas, migração lateral de cursos dágua, canais fluviais com trechos excessivamente retilíneos, etc.) e na identificação e interpretação dos principais lineamentos. Os estudos morfotectônicos... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim of this present dissertation consists in the determination of landscape unity for the town of São Thomé das Letras (MG), in the study of the area morphological evolution and appreciation of morphotectonic aspects. The fulfilment of stipulated purpose demanded a serie of analytical device that were gathered for the comprehention of landscape phisiology as well as the understanding of different landscape unities represented in graphic-chart document of synthesis. The study of morphological evolution demanded the evaluation of components the regional genetic-evolutive chart as so as to understand the operating process in local range. The research focused the occurence and status of different erosion surface in the studied area, differenciating remainders related to Superfície Sul-Americana of low Terciary, of latest dissection molded, of plio-pleistocene age. To such stage, with emphasis, was added studies interested in the morphological evolution effectuatedduring the Quaternary in consonance with climatic fluctuations that mark the referred era, which happened by means of process study of recent pedimentation and correlated deposits from evaluation of current vegetal covering and operating carstic phenomenon, also evolution of relief beig estimated focusing the structure, that grants appalachian tipicality to regional and local morphology. Regarding the morphotectonic aspects, the research turned to the relief analisis and drainage emphasizing the neotectonic phenomena based on identification of indicative morphological features (shutter ridges, captures, water-course lateral migration, river channel with excessively right-lined streches, etc.) and identification and interpretation of main lineages. The morphotectonic studies were subsidized by measuring the geomorphic rate useful for estimating neotectonic effects, notoriously the asymmetry Factor of Drainage Basins... (Complete abstract click electronic access below)
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Cornejo, Marina Inés [Verfasser]. "Pattern formation on Si surfaces by low-energy ion beam erosion / Marina Inés Cornejo." Aachen : Shaker, 2011. http://d-nb.info/1070150231/34.

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Freitas, De Abreu Marcio. "Experimental Study of Metallic Surfaces Exposed to Cavitation." Thesis, KTH, Materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231937.

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Cylinder liners in heavy-duty truck engines are subjected to intense vibrations and may sustain damage from the cavitation of bubbles in the coolant liquid, with some risks of leakage and engine breakdown. An ultrasonic oscillating probe was used to simulate the pitting rates and behavior of samples extracted from cylinder liners, which are made of grey cast iron, with differences in surface roughness, glycol and inhibitor content in coolant, coolant temperature and graphite flake class; bainitic microstructures were also tested. Measurements consisted of mass losses under set intervals during experiments lasting 2.5 or 4 hours. Affected surfaces were later evaluated with scanning electron microscopy and confocal microscopy. Results indicate higher cavitation damage with: lower concentrations of glycol and absence of corrosion/cavitation inhibitors in the coolant liquid, lower liquid temperatures between 76⁰C and 90⁰C, and presence of B-type graphite class in the microstructure. Results regarding surface roughness were inconclusive. A sequence of surface damage mechanisms has been proposed, with corresponding microscope observations, to explain the mass loss trends and the associated microstructural changes over time.
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Cornejo, Marina Inés Verfasser], and Frank [Akademischer Betreuer] [Mücklich. "Pattern formation on Si surfaces by low-energy ion beam erosion / Marina Inés Cornejo. Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2011. http://d-nb.info/1051326745/34.

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Cornejo, Marina Inés [Verfasser], and Frank [Akademischer Betreuer] Mücklich. "Pattern formation on Si surfaces by low-energy ion beam erosion / Marina Inés Cornejo. Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:291-scidok-42503.

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Levandovsky, Artem. "Structure and dynamics of interfaces in the epitaxial growth and erosion on (110) and (100) crystal surfaces." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3731.

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Thesis (Ph. D.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains vii, 129 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.
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Books on the topic "Surfaces – Erosion"

1

Lister, L. A. The erosion surfaces of Zimbabwe. Harare: Zimbabwe Geological Survey, 1987.

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Christensen, B. A. Initiation of erosion on sloping cohesionless soil surfaces. Lexington, KY: Office of Engineering Services, College of Engineering, University of Kentucky, 1988.

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Kiriakidis, G. Erosion and Growth of Solids Stimulated by Atom and Ion Beams. Dordrecht: Springer Netherlands, 1986.

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Ligotke, M. W. Soil erosion rates from mixed soil and gravel surfaces in a wind tunnel. Richland, Wash: Pacific Northwest Laboratory, 1990.

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Commandeur, P. R. Rainfall simulation, soil infiltration, and surface erosion on skidroad surfaces - Nelson Forest Region. Victoria, B.C: Canadian Forest Service and the British Columbia Ministry of Forests, 1994.

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Gregory, J. C. Analysis of surfaces from the LDEF A0114, phase II: Semi-annual report on NAG1-1228 for the reporting period Mar. 1, 1991 - Aug. 31, 1991. [Washington, DC: National Aeronautics and Space Administration, 1991.

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G, Kiriakidis, Carter G. 1934-, Whitton J. L, and North Atlantic Treaty Organization. Scientific Affairs Division., eds. Erosion and growth of solids stimulated by atom and ion beams. Dordrecht: Martinus Nijhoff Publishers in cooperation with NATO Scientific Affairs Division, 1986.

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Gireń, Bolesław Grzegorz. Kawitacyjne niszczenie warstw ukształtowanych wiązką promieniowania laserowego. Gdańsk: Wydawn. IMP PAN, 2006.

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Koontz, Robin Michal. Erosion: Changing Earth's surface. Minneapolis, Minn: Picture Window Books, 2007.

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Reiss, Dennis. Erosionsrinnen auf dem Mars. Köln: Deutsches Zentrum für Luft- und Raumfahrt e.V., 2006.

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Book chapters on the topic "Surfaces – Erosion"

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Haff, Peter K. "Erosion of Surfaces by Fast Heavy Ions." In Treatise on Heavy-Ion Science, 285–321. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4615-8103-1_7.

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Karhu, M., and S. Huttunen. "Erosion Effects of Air Pollution on Needle Surfaces." In Acidic Precipitation, 1471–77. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_151.

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Johnson, Robert E. "Plasma Erosion and Modification of Natural Surfaces and Atmospheres." In Energetic Charged-Particle Interactions with Atmospheres and Surfaces, 137–203. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-48375-2_4.

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Jeulin, Dominique, and Pascal Laurenge. "Probabilistic Model of Rough Surfaces Obtained by Electro-Erosion." In Mathematical Morphology and its Applications to Image and Signal Processing, 289–96. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0469-2_33.

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Okin, Gregory S., and Dale A. Gillette. "Modelling Wind Erosion and Dust Emission on Vegetated Surfaces." In Spatial Modelling of the Terrestrial Environment, 137–56. Chichester, UK: John Wiley & Sons, Ltd, 2005. http://dx.doi.org/10.1002/0470094001.ch7.

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Vieira, Gonçalo, Emanuel de Castro, Hugo Gomes, Fábio Loureiro, Magda Fernandes, Filipe Patrocínio, Gisela Firmino, and João Forte. "The Estrela Geopark—From Planation Surfaces to Glacial Erosion." In World Geomorphological Landscapes, 341–57. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-03641-0_27.

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Mongeot, F. Buatier, C. Boragno, and U. Valbusa. "Growth and Ion Erosion: Two Methods for Patterning Surfaces." In Atomistic Aspects of Epitaxial Growth, 221–41. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0391-9_19.

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Demoulin, Alain, François Barbier, Augustin Dekoninck, Michèle Verhaert, Gilles Ruffet, Christian Dupuis, and Johan Yans. "Erosion Surfaces in the Ardenne–Oesling and Their Associated Kaolinic Weathering Mantle." In World Geomorphological Landscapes, 63–84. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58239-9_5.

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Dentoni, V., B. Grosso, G. Massacci, M. Cigagna, C. Levanti, C. Corda, and F. Pinna. "Industrial Wind Erosion: PM Emission from the Erodible Flat Surfaces of Tailing Basins." In Proceedings of the 18th Symposium on Environmental Issues and Waste Management in Energy and Mineral Production, 15–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99903-6_2.

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Hergarten, St, G. Paul, and H. J. Neugebauer. "Modeling Surface Runoff." In Soil Erosion, 295–306. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04295-3_14.

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Conference papers on the topic "Surfaces – Erosion"

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Mbabazi, John G., and Thomas J. Sheer. "Numerical Prediction of Erosion of Mild Steel Surfaces by Boiler Fly Ash Particles." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58074.

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Fly ash particles entrained in the flue gas from boiler furnaces in coal-fired power stations can cause serious erosive wear on steel surfaces along the downstream flow path. This paper describes research into fly ash impingement erosion on such surfaces, with particular reference to the heat transfer plates in rotary regenerative air heaters. The effect of the ash particle impact velocity and impact angle on the erosive wear of mild steel surfaces was determined through experimental investigations, using three different power station ash types. The experimental data were used to calibrate a fundamentally-derived model for the prediction of erosion rates. This erosion model was incorporated into a particle-tracking CFD flow simulation of the ash-laden flue gas flow through the complex channels between corrugated air heater plates. The predicted erosion rates were compared with measured erosion rates obtained using a large accelerated-erosion test facility located at a power station. Good agreement was obtained, the predictions generally being within 20 percent of the measured values.
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Dhillon, Prabhjeet Kaur, and Subhendu Sarkar. "Dual erosion phases in HNA etched Si surfaces." In PROCEEDING OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN APPLIED PHYSICS AND MATERIAL SCIENCE: RAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4810250.

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Jee, T., and K. Komvopoulos. "Damage of Micropatterned Surfaces Due to Bubble Cavitation-Erosion." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41229.

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The capability to reliably reproduce submicrometer-scale patterns is of fundamental importance in semiconductor industry. Higher transistor speeds have been achieved through advances in device miniaturization, resulting in reduced power consumption and manufacturing cost. However, miniaturization below a critical dimension (on the order of ∼100 nm) has been linked with micropattern damage during megasonic cleaning, which decreases the device yield and increases the production cost. Micropattern surface damage due to cavitation-erosion encountered during megasonic cleaning is examined in the context of single- and multi-bubble cavitation models. The critical pressure for micropattern damage predicted by these models is interpreted in terms of important process parameters. Analytical predictions are supported by experimental results of cavitation-erosion damage of gold micropatterns induced by collapsing hydrogen bubbles generated by electrolysis. The results of this study provide insight into surface damage due to bubble cavitation-erosion, which is of great significance in megasonic cleaning of semiconductor devices, such as alternating phase-shift optical masks.
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Habenicht, S. "Diffusion and roughening during ion beam erosion of graphite surfaces." In The CAARI 2000: Sixteenth international conference on the application of accelerators in research and industry. AIP, 2001. http://dx.doi.org/10.1063/1.1395461.

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Liu, Juan. "Surface Ripple Formation Due to Solid-Liquid Slurry Erosion." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10204.

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The development of ripples and erosion on the material surfaces in a centrifugal slurry pump was investigated in laboratory tests using a sand-water slurry pot tester. The erosion of the primary material (KmTBCr26) used in the centrifugal slurry pumps was very serious. The ripple formation was influenced by the flow conditions, the impact angle of the solid particles and the particle size. Ripple formation was also observed in laboratory tests with structural steel (#40) and brittle ceramics (Al2O3, ZTA, Si3N4). The ripple profile on the structural steel surface was similar to that on the high chrome cast iron (Cr26) used in the slurry pumps. With 90° impact angles, ripples also formed on the eroded surfaces of materials tested in the sand-water slurry pot. The ripple wavelength on the ceramic surface, which was influenced by the mechanical properties and material grain size, was less than that on the metallic surfaces.
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Bachert, B., G. Ludwig, B. Stoffel, and S. Baumgarten. "Comparison of Different Methods for the Evaluation of Cavitation Damaged Surfaces." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77368.

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The experimental data which will be presented in this paper are the results of the comparison between different methods for evaluating damaged surfaces by cavitation erosion. The different methods are partly working in the initial stage of cavitation erosion and partly at developed cavitation erosion, where mass loss occurs. The used test rig consists basically of a rotating disc with a diameter of 500 mm on which four holes are located. Each hole generates a cavitation zone while the disc is rotating. The test objects are material specimens made of copper. Copper was used as test material in respect to reasonable durations for the tests. The specimen can be implemented in the casing of the test rig directly across the rotating disc on the diameter where the holes are located. This rotating disc test rig generates a very aggressive type of cavitation, so that mass loss, of course depending on the tested material, will appear after relatively short durations. Also the initial stage of cavitation erosion can be observed. The used test rig is very interesting regarding the possibility to apply different measuring techniques to characterize the erosive aggressiveness of cavitation. These techniques are at first the so-called Pitcount-Method, which allows investigations of cavitation erosion in the initial stage. The second one is an acoustic method, which is based on a structure-borne noise sensor and a specially developed signal processing system. The third method is the measuring of mass loss of the material specimen after several time steps. With the help of a CCD-camera and special digital image processing software, images of different cavitation conditions were recorded. The information obtained from these images should serve as support for the evaluation of the other used methods. After the evaluation with the above mentioned methods, the specimens were evaluated with a special device which works with the help of a white light interferometer. With this evaluation method three-dimensional information can be obtained in respect to the actually eroded volume of the specimens. With this information the lost mass of the specimens could be calculated directly. Especially the comparison of the results obtained from the Pitcount-Method, which is a two-dimensional evaluation method, and the three-dimensional results of the white light interferometer is an important point of the work within this paper.
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Legoux, J. G., B. Arsenault, J. P. Immarigeon, V. R. Parameswaran, and H. Hawthorne. "Slurry and Dry Erosion of Arc-Sprayed Metal and Composite Coatings." In ITSC 1999, edited by E. Lugscheider and P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0422.

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Abstract Arc spraying can be used to produce coatings to protect against wear and tear against erosion. This paper presents some results obtained within the core research program of the NRC Technology Group in Surface Engineering on the development of erosion-resistant coatings. A relationship is established between the volume loss of the material (performance) under different erosion conditions and the coating properties or the microstructure. The results show that the wear behavior of the arc-sprayed materials depends on the type, size and impact strength of the impacting eroding particles. It is observed that for soft materials, even if ductile tearing is an active mode of degradation, the brittle behavior of intersplat oxides also plays an important role. For harder materials, this brittle delamination of splats becomes the dominant erosive mechanism, as can be observed on the worn surfaces. Paper includes a German-language abstract.
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Metwally, M., W. Tabakoff, and A. Hamed. "An Automotive Gas Turbine Engine Blade Erosion." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-344.

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In this work, a study has been conducted to predict blade erosion and surface deterioration of the free power turbine of an automotive gas turbine engine. The blade material erosion model is based on three dimensional particle trajectory simulations in the three dimensional turbine flow field. The particle rebound characteristics after surface impacts were determined from experimental measurements of restitution ratios for blade material samples in a particulate flow tunnel. The trajectories provide the spacial distribution of the particle impact parameters over the blade surfaces. A semi-empirical erosion model, derived from erosion tests of material samples at different particulate flow conditions is used in the prediction of blade surface erosion based on the trajectory impact data. The results are presented for the three dimensional particle trajectories through the turbine blade passages, the particle impact locations, blade surface erosion pattern, and the associated erosion parameters. These parameters include impact velocity, impact angle and impact frequency. The data can be used for life prediction and performance deterioration of the automotive engine under investigation.
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Madadnia, Jafar, Mostafa Amjad, and Jeffry Kusnan. "Analysis of Severe Erosion in Industrial Centrifugal Slurry Pumps." In ASME 2013 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fedsm2013-16435.

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Centrifugal pumps designed for homogenous slurries experience inefficiency, off-design operations, shorter service-life expectancy, and rapid geometry change due to localized and uneven erosion. Experimental and numerical research to design erosion-free pumps has been inconclusive due to complexity of heterogeneous, multiphase slurry flows and mechanism of the localized material losses. This paper reports on erosion-effects of slurry flows on a number of industrial centrifugal pumps selected from an active copper mine field. The field samples include three metallic pumps operating in a serial-arrangement, and a number of worn pump-components with fully rubber-lined or metallic wetted-surfaces. Physical samples were also collected and photographed under an electronic microscope. The analysis of the photographs shows directional groves, ripples-formations, pitting, cavities, spots, and abrasive-embedding on the pump surfaces. The effected regions included a) hub or tip of the vane leading edge of impellers, b) internal and external surfaces of shroud and downstream of expellers, c) front-liners/throat bush all at the proximity of the inlet throat/tube, and d) Volute surface close to the discharge throat/tube on the spiral tail. Analysis of eroded regions suggests a combination of mechanisms some similar with those found with a sustained flow acceleration and momentum change towards a surface. A wear model is therefore recommended for the severe erosion in pumps which resembles erosion by cavitation. To further understand and verify the finding and to be able to predict and to avoid accelerated-erosion, an experimental modelling and a numerical modelling of slurry flows in two identical-centrifugal-pumps are conducted in series and preliminary results are presented. The project is in progress.
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Katscher, U., B. K. Bein, J. Pelzl, and K. Simon. "Photothermal erosion of surfaces analyzed with the help of the mirage effect." In PHOTOACOUSTIC AND PHOTOTHERMAL PHENOMENA. ASCE, 1999. http://dx.doi.org/10.1063/1.58025.

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Reports on the topic "Surfaces – Erosion"

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Cote, Paul J., and Christopher Rickard. Gray Layers and the Erosion of Chromium Plated Gun Bore Surfaces. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada369065.

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Underwood, J. H. Gray Layers and the Erosion of Chromium Plated Gun Bore Surfaces. Fort Belvoir, VA: Defense Technical Information Center, April 2000. http://dx.doi.org/10.21236/ada377513.

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Ligotke, M. W., and D. C. Klopfer. Soil erosion rates from mixed soil and gravel surfaces in a wind tunnel. Office of Scientific and Technical Information (OSTI), August 1990. http://dx.doi.org/10.2172/6603562.

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Brooks, J. N. ITER divertor sputtering erosion -- recent analysis for carbon, beryllium, tungsten, and niobium surfaces. Office of Scientific and Technical Information (OSTI), July 1991. http://dx.doi.org/10.2172/5439807.

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Bradford, Joe, Itzhak Shainberg, and Lloyd Norton. Effect of Soil Properties and Water Quality on Concentrated Flow Erosion (Rills, Ephermal Gullies and Pipes). United States Department of Agriculture, November 1996. http://dx.doi.org/10.32747/1996.7613040.bard.

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Concentrated flow erosion in rills, pipes, ephermal gullies, and gullies is a major contributor of downstream sedimentation. When rill or gullies form in a landscape, a 3- to 5-fold increase in soil loss commonly occurs. The balance between the erosive power of the flow and the erosion resistance of the bed material determines the rate of concentrated flow erosion. The resistance of the bed material to detachment depends primarily on the magnitude of the interparticle forces or cohesion holding the particles and aggregates together. The effect of soil properties on bed material resistance and concentrated flow erosion was evaluated both in the laboratory and field. Both rill erodibility and critical hydraulic shear were greater when measured in 9.0 m long rills under field conditions compared with laboratory mini-flumes. A greater hydraulic shear was required to initiate erosion in the field compared to the mini-flume because of the greater aggregate and clod size and stability. Once erosion was initiated, however, the rate of erosion as a function of hydraulic shear was greater under field conditions because of the greater potential for slaking upon wetting and the greater soil surface area exposed to hydraulic shear. Erosion tests under controlled laboratory conditions with the mini-flume allowed individual soil variables to be studied. Attempts to relate rill erosion to a group soil properties had limited success. When individual soil properties were isolated and studied separately or grouped separately, some trends were identified. For example, the effect of organic carbon on rill erodibility was high in kaolinitic soils, low in smectitic soils, and intermediate in the soils dominated by illite. Slow prewetting and aging increased the cohesion forces between soil particles and decreased rill erodibility. Quick prewetting increased aggregate slaking and increased erodibility. The magnitude of the effect of aging depended upon soil type. The effect of clay mineralogy was evaluated on sand/clay mixtures with montmorillonite (M), Illite (I), and kaolinite (K) clays. Montmorillonite/sand mixtures were much less erodible than either illite or kaolonite sand mixtures. Na-I and Na-K sand mixtures were more erodible than Ca-I and Ca-K due to increased strength from ionic bonding and suppression of repulsive charges by Ca. Na-M was less erodiblethan Ca-M due to increased surface resulting from the accessibility of internal surfaces due to Na saturation. Erodibility decreased when salt concentration was high enough to cause flocculation. This occurred between 0.001 mole L-1 and 0.01 mole L-1. Measuring rill erodibility in mini-flumes enables the measurement of cohesive forces between particles and enhances our ability to learn more about cohesive forces resisting soil detachment under concentrated water flow.
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Ligotke, M. W. Soil erosion rates from mixed soil and gravel surfaces in a wind tunnel: A preliminary report. Office of Scientific and Technical Information (OSTI), December 1988. http://dx.doi.org/10.2172/6631013.

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Walters, W. H., K. A. Hoover, and L. L. Cadwell. Project test plan for runoff and erosion on fine-soil barrier surfaces and rock-covered side slopes. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/6760098.

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Kerr, D. E. Reconnaissance surficial geology, Tinney Hills, Nunavut, NTS 76-J. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321821.

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The Tinney Hills map area consists primarily of glacially and meltwater scoured bedrock, discontinuous till in the southwest and central-east, and postglacial marine sediments in coastal lowlands and along river valleys inland. The boundaries of many till deposits are cut to bedrock by widespread subglacial meltwater erosion. Ridged till in particular, is often associated with eskers and other glaciofluvial sediments and meltwater erosion. Striations and streamlined till landforms indicate regional ice flow towards the north-northwest and northwest, and later crosscutting relationships recording minor variations locally. Orientation of eskers and outwash plains suggest ice recession was primarily southeastward. Small, isolated glacial lakes formed where retreating or stagnant ice temporarily blocked local drainage. Below 200 to 220 m elevation, the region was inundated by the sea during ice retreat. Glaciomarine and marine sediments consist of littoral beach and offshore sediments, winnowed till surfaces, and isolated deltas. Isostatic rebound caused marine regression, recorded by deltas and beaches at 210 to 220 m elevation, and decreasing to current sea level.
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C. Harrington, R. Kelly, and K.T. Ebert. VARIATION IN EROSION/DEPOSITION RATES OVER THE LAST FIFTTY YEARS ON ALLUVIAL FAN SURFACES OF L. PLEISTOCENE-MID HOLOCENE AGE, ESTIMATIONS USING 137CS SOIL PROFILE DATA, AMARGOSA VALLEY, NEVADA. Office of Scientific and Technical Information (OSTI), August 2005. http://dx.doi.org/10.2172/884944.

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Brooks, J. N., D. N. Ruzic, D. B. Hayden, and R. B. Jr Turkot. Surface erosion issues and analysis for dissipative divertors. Office of Scientific and Technical Information (OSTI), August 1994. http://dx.doi.org/10.2172/10158166.

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