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Добірка наукової літератури з теми "WEAR PROPERTY"

Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "WEAR PROPERTY"

1

Das, Arpan, and Palash Poddar. "Structure–wear-property correlation." Materials & Design 47 (May 2013): 557–65. http://dx.doi.org/10.1016/j.matdes.2012.12.041.

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2

Li, Duo Sheng, Dun Wen Zuo, Xian Liang Zhou, Jian Yun Zhang, and Xiao Zhen Hua. "Wear-Resistant Property of SiCp/Al Composites." Key Engineering Materials 368-372 (February 2008): 1096–98. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1096.

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Al alloy reinforced with SiCp (size: 70-220μm) was fabricated by pressureless-infiltration. Its wear resistant property was investigated under different heat-treatment conditions, and morphology of worn surface was examined. The results showed that the composite was integrated, uniform and compact, and its wear resistant property was better than that of the unreinforced matrix alloy. It was indicated that some rigid SiCp in the abraded surface of the composite could support part of loads and replace matrix to wear-tear, which improved the wear resistant property. Compared to annealing, solution aging strengthens Al alloy matrix and cohesion with SiCp, and the wear resistant property of composites was better. Combining interface is also an important factor which influences on wear resistant property. During the wear test, the smaller SiCp size, the more interfaces, there are more SiCp falling off because of loosening combining interface, which results in more wear-tearing value. The wear rate of composite increases with decreasing SiCp size, thus, the composite with larger SiCp has better wear-resistant property than that with smaller SiCp. At last, the wear mechanism of the composite was also studied, and it showed that abrasive wear dominated in the abrasion process.
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3

Fan, Yu Jin, Zhe Kun Li, Teng Han, and Wei Da Wang. "Finite Element Simulation of Abrasive Wear and Study of Wear Resistance of Material." Advanced Materials Research 765-767 (September 2013): 3192–95. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.3192.

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This paper presented the abrasive wear process of a particle pressing into the material and sliding on the surface simulated by finite element method to reveal wear characteristics and effect factors. The contact stress and surface deformation of material were indicated and material wear resistance was studied, it was found that the stress and the deformation of subsurface not only depends on mechanical properties of material and original surface shape, but also on deformed surface profile due to sliding. In order to prove the effects of material yield stress and deformation harden property on surface deformation and abrasion resistance property, the abrasive wear of three kinds of carbon steel were taken for examples, the simulation results were presented that the larger yield stress of carbon steel, the less surface deformation and the better abrasion resistance property when a particle sliding on the surface. The simulation results also shown that the deformation harden of carbon steel could reduce surface deformation, but couldnt always improve abrasion resistance property.
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4

SHIMIZU, K., T. KIMURA, T. MOMONO, T. KAMOTA, H. MATSUMOTO, and S. KAMOTA. "P18: Development of Material Wear-property in Homogenizer and Wear Characteristic Evaluation(SHORT ORAL PRESENTATION FOR POSTERS I)." Proceedings of the JSME Materials and Processing Conference (M&P) 2005 (2005): 18–19. http://dx.doi.org/10.1299/jsmeintmp.2005.18_7.

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5

Hao, Rui, Aleksander A. Tedstone, David J. Lewis, Chris P. Warrens, Kevin R. West, Philip Howard, Sander Gaemers, Shen J. Dillon, and Paul O’Brien. "Property Self-Optimization During Wear of MoS2." ACS Applied Materials & Interfaces 9, no. 2 (January 6, 2017): 1953–58. http://dx.doi.org/10.1021/acsami.6b13802.

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6

Sasaki, T., T. Yakou, M. Umemoto, and Y. Todaka. "Two-body abrasive wear property of cementite." Wear 260, no. 9-10 (May 2006): 1090–95. http://dx.doi.org/10.1016/j.wear.2005.07.010.

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7

Liu, Ping, Shu Guo Jia, Feng Zhang Ren, Bao Hong Tian, and Mao Sheng Zheng. "Electrical Sliding Wear Property of Cu-Ag-Cr Alloy." Solid State Phenomena 118 (December 2006): 497–502. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.497.

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By means of a vacuum induction furnace, Cu-Ag-Cr alloy were produced. The wear property and mechanism of Cu-Ag-Cr alloy are studied, and its property was compared with a Cu-Ag alloy. The microstructure of the Cu-Ag-Cr alloy before wear tests was analyzed by transmission electron microscopy. Worn surfaces of the Cu-Ag-Cr alloy were analyzed by scanning electron microscope (SEM) and energy dispersive X-ray spectrum (EDS). Wear tests were conducted under laboratory with a special sliding wear apparatus that simulated the tribological conditions of sliding current collectors on contact wires, and alloy wire was slid against a copper-based powder metallurgy strip under unlubricated conditions. The results show that the wear rate of Cu-Ag-Cr alloy increase with the increase in the sliding speed and the sliding distance. Adhesive wear, abrasive wear and electrical erosion wear are the dominant mechanisms under the electrical current sliding processes. At lower sliding speed, adhesives wear and abrasive wear are the major wear damage, while electrical erosion wear and adhesive wear are the major at higher sliding speed. Under the same conditions, the wear resistance of the Cu-Ag-Cr alloy is 2~3 times of the Cu-Ag alloy.
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8

Liu, Y., and H. M. Wang. "Microstructure and wear property of laser-clad Co3Mo2Si/Coss wear resistant coatings." Surface and Coatings Technology 205, no. 2 (October 2010): 377–82. http://dx.doi.org/10.1016/j.surfcoat.2010.06.064.

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9

Das, Debdulal, Apurba Kishore Dutta, and Kalyan Kumar Ray. "Structure-Property Correlation of Cryotreated AISI D2 Steel." Advanced Materials Research 117 (June 2010): 49–54. http://dx.doi.org/10.4028/www.scientific.net/amr.117.49.

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Анотація:
This study aims to reveal the underlying mechanism associated with the enhancement of wear resistance of tool steels by deep cryogenic treatment and to resolve the issue of reported varied degree of improvement in wear resistance through structure-property correlation of cryotreated vis-à-vis conventionally treated AISI D2 steel. Microstructures of heat treated specimens have been characterized employing various techniques with specific emphasis on quantitative estimation of the characteristics of secondary carbides. Evaluations of properties include measurements of bulk hardness, apparent strength of the matrix, fracture toughness and dry sliding wear resistance under wide rage of normal loads supplemented by in-depth characterizations of worn surfaces, wear debris and subsurfaces of worn specimens in order to identify the operative mode and mechanism of wear. It has been demonstrated that the favorable modifications of the precipitation behavior of secondary carbides in addition to removal of retained austenite are the governing mechanisms for the enhancement of wear resistance of tool steels by deep cryogenic treatment. The cause of the reported varied degree of improvement in wear resistance by deep cryogenic treatment has been explained by disparity of the operative modes and mechanisms of wear.
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10

NAKASHIMA, Kazuhiro, Teruo MURAKAMI, and Yoshinori SAWAE. "Evaluation of Wear Property of PVA Hydrogel as Artifical Cartilage and Effect of Protein Film on Wear-Resistant Property." Transactions of the Japan Society of Mechanical Engineers Series C 70, no. 697 (2004): 2780–87. http://dx.doi.org/10.1299/kikaic.70.2780.

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Дисертації з теми "WEAR PROPERTY"

1

Deshpande, Pranav K. "Wear Resistance and Electrical Property of Infrared Processed Copper/Tungsten Carbide Composites." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147536455.

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2

He, Mengwei. "Microstructure-Property Relationships in CoCrNi-Based High Entropy Alloys: From the Atomic-Scale." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29466.

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High entropy alloys (HEAs) have attracted enormous research interest world-wide because of their intriguing compositional make-up, and because of their potential as structural materials in extreme environments such as extremes of temperature, neutron fluence, mechanical wear, and cyclic deformation A key challenge in the study of HEAs remains the desire to measure the detail of the atomic neighbourhoods. This thesis proposes a new framework for the quantification of short range order (SRO) and reveals processing-SRO-mechanical property relationships in a CoCrNi-based ternary HEA. Having established the optimal APT operating parameters, a workflow for accurately assessing the SRO in the HEAs using APT is proposed. The influence of detector efficiency and spatial resolution on the SRO was carefully evaluated. It is suggested that this new procedure has potential to significantly enhance the ability of the atom probe to precisely study atomic coordination in HEAs and other materials. On the basis of this method, the potential for relationships between thermo-mechanical processing and SRO was investigated. The results indicate that different heat treatments do indeed change the SRO in CoCrNi alloys. Then, the new approach to measuring SRO in HEAs was applied to samples at various stages of tensile deformation via interrupted tensile tests. After different plastic strain levels, the SRO and other microstructural attributes such as the defect distributions were studied, and evidence presented that the SRO is sensitive to the amount of prior plastic deformation. Finally, retaining a focus on the mechanical properties of the HEAs, but shifting the emphasis to wear, a new series of HEAs was designed and prepared. The results demonstrate the significant potential of combining the substitutional Sc and interstitial C elements to achieve high values for hardness, wear resistance and fracture toughness.
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3

Tu, Wei-Lun. "Processing, Structure, and Tribological Property Interrelationships in Sputtered Nanocrystalline ZnO Coatings." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12207/.

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Solid lubricant coatings with controlled microstructures are good candidates in providing lubricity in moving mechanical assembly applications, such as orthopedics and bearing steels. Nanocrystalline ZnO coatings with a layered wurtzite crystal structure have the potential to function as a lubricious material by its defective structure which is controlled by sputter deposition. The interrelationships between sputtered ZnO, its nanocrystalline structure and its lubricity will be discussed in this thesis. The nanocrystalline ZnO coatings were deposited on silicon substrates and Ti alloys by RF magnetron sputtering with different substrate adhesion layers, direct current biases, and temperatures. X-ray diffraction identified that the ZnO (0002) preferred orientation was necessary to achieve low sliding friction and wear along with substrate biasing. In addition, other analyses such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) were utilized to study the solid lubrication mechanisms responsible for low friction and wear.
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4

Greenhalgh, Paul. "Grease to the wheel or a spanner in the works? : an investigation of office and industrial occupier displacement and property market filtering generated by public sector assisted property developments : a case study of Tyne and Wear." Thesis, Northumbria University, 2006. http://nrl.northumbria.ac.uk/2668/.

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The thesis is a study of property occupier displacement generated by the supply of new office and industrial accommodation that has been promoted or assisted by property-led regeneration policies. A review of literature revealed that there had been little in-depth investigation of the phenomenon of occupier displacement and the filtering effect associated with it. A flow model was developed to illustrate the incidence of occupier displacement and the process of property market filtering. There are two main strands to the research (see Figure 1.1), firstly an exploration of the property chains generated by the displacement of office and industrial occupiers in response the supply of new accommodation, and secondly, an investigation of the reasons why office and industrial occupiers relocate and how they determine where to move to. Three phases of research were employed to record the displacement generated by twenty public sector assisted office and industrial developments in the Tyne and Wear conurbation. Occupiers of twenty developments were identified by site inspections and a total population questionnaire survey was undertaken, complemented by a telephone survey, to record the status and origin of over 500 property occupiers and allow the property chains to be pursued. The chaining exercise revealed the scale of displacement or relocation and the outcome of the resulting chains. The origin of first move occupiers and chain-ends was plotted to reveal their spatial distribution. The research recorded that over half of all occupiers had relocated and over a third of chains generated by such moves, resulted in vacant property elsewhere in the conurbation. Structured interviews with 29 office and industrial occupiers were undertaken to investigate their locational decisions and the factors that influenced their outcome, the results of which were triangulated with the earlier research phases to reveal ten key themes that fundamentally determine such decisions. The originality of the research is the scale and rigour of the chaining survey, the mapping of the spatial distribution of the origin of occupiers and the chain-ends, and the pursuit of understanding of how occupiers respond to the availability of new accommodation. The scale occupier displacement, generated by new office and industrial accommodation, is significant, but by stimulating property market excitation and vacancy a filtering effect is set-up that can generate positive benefits to a local economy by allowing occupiers to expand.
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5

Tang, Fei. "The Microstructure-Processing-Property Relationships in an Al Matrix Composite System Reinforced by Al-Cu-Fe Alloy Particles." Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/835313-syGDu9/webviewable/.

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6

Favacchio, Giuseppe. "Cohen-Macaulayness of tower sets and Betti Weak Lefschetz Property." Doctoral thesis, Università di Catania, 2014. http://hdl.handle.net/10761/1550.

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Анотація:
We deal with the Cohen-Macaulay property for monomial squarefree ideals. We characterize the Cohen-Macaulay squarefree monomial ideals of codimension two just looking at their minimal prime ideals. We introduce the notion of tower sets and other configurations which preserve the Cohen-Macaulayness. We study the Hilbert function and the graded Betti numbers for generic linear quotients of Artinian standard graded algebras, especially in the case of Weak Lefschetz algebras. Moreover, we investigate a particular property of Weak Lefschetz algebras, the Betti Weak Lefschetz Property, which makes possible to completely determinate the graded Betti numbers of a generic linear quotient of such algebras.
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7

Abouda, Emna. "Étude de revêtements durs pour la tenue à l’usure par rechargement laser dans la robinetterie nucléaire sur des fonctions de guidage et d’étanchéité." Thesis, Paris, ENSAM, 2018. http://www.theses.fr/2018ENAM0007.

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Le remplacement des alliages durs à base cobalt par des alliages à base fer suscite un intérêt croissant pour la protection anti-usure des pièces métalliques fonctionnant dans le circuit primaire d’une centrale nucléaire. Dans le cadre de cette thèse, une étude métallurgique détaillée a été effectuée sur des dépôts épais en Norem 02™ élaborés par le procédé de projection laser.Un affinement significatif de la microstructure du Norem 02™ a été obtenu après optimisation des paramètres du procédé (puissance laser, vitesse de balayage et débit de poudre), par rapport à un procédé concurrent par Plasma à Arc Transféré. Les essais tribologiques montrent que l’amélioration de la microstructure n’empêche cependant pas l’apparition du grippage à 300°C.La deuxième partie de cette étude a été consacrée à l’amélioration du Norem 02™ avec ajout de différents éléments chimiques. Le choix de ces ajouts adéquats a été validé grâce aux tests de frottement réalisés sur des échantillons en Norem 02™ modifié, sous haute contrainte mécanique (1 GPa) et à haute température (300°C). Parmi une dizaine d’éléments d’ajouts testés, l’ajout de titane a permis une transformation complète de la microstructure du Norem 02™. Cette transformation métallurgique a amélioré son comportement tribologique avec un faible coefficient de frottement (<0.3) à 300°C.L’origine de cette amélioration du comportement mécanique du Norem 02-Ti a été étudiée et expliquée par différentes analyses microstructurales (MO, MEB, EDS, EBSD) ainsi que des essais de traction sur des éprouvettes extraites des revêtements épais
This study aims to substitute the cobalt-based hardfacing alloys with iron-based hardfacing alloys to protect mechanical parts operating in the primary circuit of a pressurized water reactor (PWR)Firstly, a detailed metallurgical study was carried out to characterize a thick deposit on Norem 02™ produced by the laser process (Direct Metal Deposition - DMD). Compared with a classical PTA process, a microstructure refinement was achieved after an optimization of process parameters (laser power, scanning speed and powder flow-rate). However, wear tests show that the improvement of the microstructure does not prevent the occurrence of galling at 300 ° C.The second part of this study is dedicated to Norem 02™ improvement with the addition of various chemical elements. The appropriate additions to this application have been validated by wear tests under high mechanical stress (1 GPa) and at high temperature (300°C). Among a dozen samples of modified Norem 02 ™, the addition of titanium was shown to provide a complete transformation of the initial Norem 02™’s microstructure. This metallurgical transformation improved its tribological behavior with a low friction coefficient (<0.3) obtained at 300 °C.Last, the origin of the mechanical behavior improvement of Norem 02-Ti was studied and explained by microstructural analysis (MO, MEB, EDS, EBSD) and tensile tests on specimens extracted from thick coatings
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8

Borozan, Valentin. "Proper and weak-proper trees in edges-colored graphs and multigraphs." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00738959.

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Dans la présente thèse nous étudions l'extraction d'arbres dans des graphes arêtes-coloriés.Nous nous concentrons sur la recherche d'arbres couvrants proprement arête-coloriés et faiblement arête-coloriés, notée PST et WST. Nous montrons que les versions d'optimisation de ces problèmes sont NP-Complete dans le cas général des graphes arêtes-coloriés, et nous proposons des algorithmes pour trouver ces arbres dans le cas des graphes arêtes-coloriés sans cycles proprement arêtes-coloriés.Nous donnons également quelques limites de nonapproximabilité. Nous proposons des conditions suffisantes pour l'existence de la PST dans des graphes arêtes-coloriés (pas forcément propre), en fonction de différents paramètres de graphes, tels que : nombre total de couleurs, la connectivité et le nombre d'arêtes incidentes dedifférentes couleurs pour un sommet. Nous nous intéressons aux chemins hamiltoniens proprement arêtes-coloriés dans le casdes multigraphes arêtes-coloriés. Ils présentent de l'intérêt pour notre étude, car ce sontégalement des arbres couvrants proprement arêtes-coloriés. Nous établissons des conditions suffisantes pour qu'un multigraphe contienne un chemin hamiltonien proprement arêtes-coloriés, en fonction de plusieurs paramètres tels que le nombre d'arêtes, le degré d'arêtes, etc. Puisque l'une des conditions suffisantes pour l'existence des arbres couvrants proprement arêtes-coloriés est la connectivité, nous prouvons plusieurs bornes supérieures pour le plus petit nombre de couleurs nécessaires pour la k-connectivité-propre. Nous énonçons plusieurs conjectures pour les graphes généraux et bipartis, et on arrive à les prouver pour k = 1.
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9

Zucca, Fabio, and Andreas Cap@esi ac at. "The Mean Value Property for Harmonic Functions on Graphs and Trees." ESI preprints, 2001. ftp://ftp.esi.ac.at/pub/Preprints/esi1002.ps.

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10

Braga, Bruno. "On the Borel complexity of some classes of Banach spaces." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1377115201.

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Книги з теми "WEAR PROPERTY"

1

Watt, Stanley. Firm heterogeneity and weak intellectual property rights. [Washington, D.C.]: International Monetary Fund, Middle East and Central Asia Dept., 2007.

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2

Brie, Michael. Wer ist Eigentümer im Sozialismus?: Philosophische Überlegungen. Berlin: Dietz, 1990.

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3

Stevenson, S. A. W. The performance and weak form efficiency of the Irish property market: Y Simon Stevenson. Dublin: University College Dublin, Department of Banking and Finance, 1995.

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4

Office, General Accounting. Financial management: Customs' accountability for seized property and special operation advances was weak : report to the Commissioner, U.S. Customs Service. Washington, D.C: The Office, 1993.

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5

United States. Government Accountability Office. Property Management: Lack of accountability and weak internal controls leave NASA equipment vulnerable to loss, theft, and misuse : report to the Chairman, Committee on Science and Technology, House of Representatives. Washington, D.C: U.S. Government Accountability Office, 2007.

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6

Wer konnte, griff zu: "arisierte" Güter und NS-Vermögen im Krauland-Ministerium (1945-1949). Wien: Böhlau, 1999.

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7

Office, General Accounting. Nuclear security: Weak internal controls hamper oversight of DOE's security program : report to the chairman, Subcommittee on Oversight and Investigations, Committee on Energy and Commerce, House of Representatives. Washington, D.C: U.S. General Accounting Office, 1992.

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8

Office, General Accounting. Nuclear security: Weak internal controls hamper oversight of DOE's security program : report to the Chairman, Subcommittee on Oversight and Investigations, Committee on Energy and Commerce, House of Representatives. Washington, D.C: U.S. General Accounting Office, 1992.

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9

United States. Army Materiel Command, ed. Financial management: Weak financial accounting controls leave commodity command assets vulnerable to misuse : report to the Commander, U.S. Army Materiel Command. Washington, D.C: The Office, 1992.

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10

Britain, Great. Northumberland, Tyne and Wear National Health Service Trust (Transfer of Trust Property) Order 2008. Stationery Office, The, 2008.

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Частини книг з теми "WEAR PROPERTY"

1

Li, Duo Sheng, Dun Wen Zuo, Xian Liang Zhou, Jiang Yun Zhang, and Xiao Zhen Hua. "Wear-Resistant Property of SiCp/Al Composites." In High-Performance Ceramics V, 1096–98. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-473-1.1096.

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2

Idris, Jamaliah, and J. C. Tan. "Wear Resistance Property and Microstructure of Magnesium AZ91 Composite." In Magnesium Technology 2000, 310–17. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118808962.ch43.

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3

Todd, Richard I., and Apichart Limpichaipanit. "Microstructure-Property Relationships in Wear Resistant Alumina/SiC "Nanocomposites"." In Advances in Science and Technology, 555–63. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908158-01-x.555.

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4

Liu, Ping, Shu Guo Jia, Feng Zhang Ren, Bao Hong Tian, and Mao Sheng Zheng. "Electrical Sliding Wear Property of Cu-Ag-Cr Alloy." In Solid State Phenomena, 497–502. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-25-6.497.

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5

Marshall, A. L., and S. Salamone. "Property and Microstructural Correlations to Wear on Reaction Bonded Materials." In Mechanical Properties and Performance of Engineering Ceramics and Composites VI, 297–304. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118095355.ch27.

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6

Kumaravel, D., and K. Arunkumar. "Improve the Wear Property of En19 Steel by Boronizing Process." In Lecture Notes in Mechanical Engineering, 123–31. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1724-8_12.

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7

Şahin, Y., M. Yankaş, A. M. Tokdede, and P. De Baets. "Wear Property of Epoxy Reinforced with Carbon Using a Response Surface Methodology." In Proceedings of the 7th International Conference on Fracture Fatigue and Wear, 591–601. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0411-8_53.

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Brackmann, Lukas, Arne Röttger, Hoang-Giang Bui, Sahir Butt, Golnaz Hoormazdi, Abdiel Ramon Leon Bal, Sebastian Priebe, et al. "Excavation Simulations and Cutting Tool Wear." In Interaction Modeling in Mechanized Tunneling, 93–164. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-24066-9_3.

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AbstractThe mechanized tunnel construction is carried out by tunnel boring machines, in which the soil in front of the working face is removed, and the tunnel lining is carried out with shotcrete or the setting of segments and their back injection. Advancements in this field aim towards increase of the excavation efficiency and increase of the tool lifetime, especially in rock-dominated grounds. The latter is achieved by understanding the wear mechanisms abrasion and surface-fatigue, and by knowledge of the microstructure-property relation of the utilized materials. Improvements for tool concepts are derived, based on experiments and simulations. A key parameter towards efficient rock excavation is the shape of the cutting edge of the utilized disc cutters. Sharp cutting edges have proven to generate higher rock excavation rates compared to blunt ones. The compressive strength of the utilized steel has to be high, to inhibit plastic deformation and thereby to maintain sharp cutting edges. This requirement competes with the demand for toughness, which is necessary to avoid crack-growth in the case of cyclic loading. Solutions for this contradiction lie in specially designed multiphase microstructures, containing both hard particles and ductile microstructural constituents. Besides adapting the alloying concept, these required microstructures and the associated properties can be adjusted by specific heat-treatments.
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Sun, Rong, Ruxu Du, Shuhui Yu, and Qunji Xue. "Friction and Wear Property of Amorphous Carbon Films Prepared by Ion Beam Assisted Deposition." In Advanced Tribology, 676–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03653-8_219.

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Yigezu, Belete Sirahbizu, M. M. Mahapatra, and P. K. Jha. "Mechanical Property and Abrasive Wear Characteristics of In-Situ Synthesized Al+12Si/10TiC Composites." In TMS2013 Supplemental Proceedings, 1053–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118663547.ch129.

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Тези доповідей конференцій з теми "WEAR PROPERTY"

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Hu, Zengrong, Zhuqiang Shao, Feng Chen, Jiale Xu, Changjun Chen, and Changjun Chen. "Wear and Friction Property of Laser Sintered Graphene Nickel Composite Coating." In 2017 2nd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/amcce-17.2017.107.

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Sawae, Y., T. Murakami, S. Tashima, and T. Shimotoso. "IMPROVEMENT IN MICROSTRUCTURE AND WEAR PROPERTY OF ALUMINA CERAMICS FOR JOINT PROSTHESES." In Proceedings of the 12th International Symposium on Ceramics in Medicine. WORLD SCIENTIFIC, 1999. http://dx.doi.org/10.1142/9789814291064_0024.

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3

Danlu Song and Lingling Yang. "Study on the alleviating fretting wear property of Ni-Tl-B coatings." In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5536546.

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4

Jingjing, Xu, Liu Ge, Li Zhixiong, Zhou Min, Shang Zhixuan, and Quan Yuxuan. "Computer Simulation Research on Wear Property of HVAS Coating by Fuzzy Model." In 2021 IEEE 3rd International Conference on Civil Aviation Safety and Information Technology (ICCASIT). IEEE, 2021. http://dx.doi.org/10.1109/iccasit53235.2021.9633581.

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5

Jin, Xiaoliang. "Identification of Process Damping Coefficient Based on Material Constitutive Property." In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4204.

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The contact between the tool flank wear land and wavy surface of workpiece causes energy dissipation which influences the tool vibration and chatter stability during a dynamic machining process. The process damping coefficient is affected by cutting conditions and constitutive property of workpiece material. This paper presents a finite element model of dynamic orthogonal cutting process with tool round edge and flank wear land. The process damping coefficient is identified based on the energy dissipation principle. The simulated results are experimentally validated.
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Ishikawa, Y., J. Kawakita, and S. Kuroda. "Tribological Property of WC Cermet Coatings Sprayed by Using an Improved HVOF Process." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63461.

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An improved HVOF spray process called “Gas-shrouded HVOF” (GS-HVOF) has been developed over the past several years. By using an extension nozzle at the exit of a commercial HVOF spray gun, GS-HVOF is capable of controlling the oxidation of sprayed materials during flight as well as achieving higher velocity of sprayed particles. These features result in extremely dense and clean microstructure of the sprayed coatings. The process has been successfully applied to corrosion resistant alloys such as SUS316L, HastelloyC, and alloy 625 as well as cermets such as WC-Cr3C2-Ni. Wear properties of WC cermet coatings were measured by using a pin-on-disk wear tester. The specific wear rates of the coatings prepared by the GS-HVOF with a reducing (fuel rich) flame were close to that of chrome plating. The wear amount of the heat-treated GS-HVOF coatings could not be detected after testing. It is believed that transition to mild wear appeared early because of the increased surface oxidation due to the heat treatment.
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Lin, Xue-Yan, Liang-Jun Xu, Yan-Chao Shao, Guo-Ping Luo, and Hong-Xue Zhang. "Research on Fretting Resistance and Fretting Wear Property of Ni-Au Contact Pair." In 2011 IEEE 57th Holm Conference on Electrical Contacts (Holm 2011). IEEE, 2011. http://dx.doi.org/10.1109/holm.2011.6034785.

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Park, J. M., S. W. Lee, and B. K. Kim. "Tribological Behavior of Plasma-Sprayed Coating Layers in Cr2O3/TiO2." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0121.

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Abstract Wear property of plasma spray coating in Cr2O3/TiO2 powder manufactured of spray dry method on the aluminum substrate was inspected for the application of piston-ring of automotive engine. The plasma spray coatings were varied with feed rate and particle size. Using the ball-on disc type tribometer, wear volume property and surface roughness were investigated. The delamination of the coating layers and wear track were observed with SEM. Also, the cross-section of wear track were investigated, using optical microscopy. As a result of experiment, wear mechanism was addressed.
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Wei, Shizhong, Jinhua Zhu, Liujie Xu, and Rui Long. "The Study on Abrasive Wear of Carbon of High Vanadium High Speed Steel Compared With That of High Chromium Cast Iron." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63590.

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It is studied the carbons abrasive wear property of high vanadium high speed steel compared with that of general high chromium cast iron (Cr20) in this paper. The vanadium content is 10% in the high vanadium high speed steel, and it is a kind of new wear material that has been studied in the past ten years. In the experiment the three materials were used to resist the abrasive wear of Al2O3, the wear test was conducted on a ML-10 abrasive wear-testing machine. The abrasive surfaces, cross-section and sloping -section surfaces were scanned by means of a SEM (JSM-5160LV) device. The typical morphology photos of VC and Cr7C3 were taken in course of abrasive wear, which not only describe the different abrasive wear property of the carbons in the two materials, but also make the cause of the excellent wear property of this HSS clear. The research results have showed that the service lives (V10) are three times longer than that of high chromium cast iron (Cr20). The excellent wear resistance of high vanadium high-speed steel depends on the characters of high hardness, lumpy morphology of VC which are scattered in hard matrix of HSS.
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Kharlamov, Yu A., and M. Y. Kharlamov. "A Systems Approach for Analyzing Structure-Property Relationships in Thermal Sprayed Coatings." In ITSC2004, edited by Basil R. Marple and Christian Moreau. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.itsc2004p0753.

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Abstract The short description of traditional methods of thermal sprayed coatings (TSC) structure characterization is given. The main parameters of structure and physico-mechanical properties of TSC, which influenced on their wear resistance are considered. The system approach for analyses of structure of TSC and the scheme of TSC properties prediction is proposed. The classification of structure levels of wear resistant coatings, obtained by thermal spraying, and models of their elements are proposed. The advisability of use of methods of structure-simulation modeling of TSC is shown.
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Звіти організацій з теми "WEAR PROPERTY"

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Pisani, William, Dane Wedgeworth, Michael Roth, John Newman, and Manoj Shukla. Exploration of two polymer nanocomposite structure-property relationships facilitated by molecular dynamics simulation and multiscale modeling. Engineer Research and Development Center (U.S.), March 2023. http://dx.doi.org/10.21079/11681/46713.

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Polyamide 6 (PA6) is a semi-crystalline thermoplastic used in many engineering applications due to good strength, stiffness, mechanical damping, wear/abrasion resistance, and excellent performance-to-cost ratio. In this report, two structure-property relationships were explored. First, carbon nanotubes (CNT) and graphene (G) were used as reinforcement molecules in simulated and experimentally prepared PA6 matrices to improve the overall mechanical properties. Molecular dynamics (MD) simulations with INTERFACE and reactive INTERFACE force fields (IFF and IFF-R) were used to predict bulk and Young's moduli of amorphous PA6-CNT/G nanocomposites as a function of CNT/G loading. The predicted values of Young's modulus agree moderately well with the experimental values. Second, the effect of crystallinity and crystal form (α/γ) on mechanical properties of semi-crystalline PA6 was investigated via a multiscale simulation approach. The National Aeronautics and Space Administration, Glenn Research Center's micromechanics software was used to facilitate the multiscale modeling. The inputs to the multiscale model were the elastic moduli of amorphous PA6 as predicted via MD and calculated stiffness matrices from the literature of the PA6 α and γ crystal forms. The predicted Young's and shear moduli compared well with experiment.
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Wilson, Nicole, and Leah Rosenzweig. Growth or Goods: Examining Tax Morale Among Property Owners in Lagos. Institute of Development Studies, November 2022. http://dx.doi.org/10.19088/ictd.2022.016.

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What motivates property owners to pay taxes in places where state enforcement is weak? Using an online experiment among property owners in Lagos, Nigeria, we evaluate the extent to which different appeals increase respondents’ tax morale, their willingness to pay taxes if there is no enforcement, and attitudes about government enforcement of tax collection. Respondents were randomly assigned to read either a vignette emphasising the role of property tax revenue in contributing to economic growth and increased property values, or one highlighting that tax revenue is used for public goods and services benefiting all residents. The growth message made respondents significantly more favourable towards enforcement of tax collection, but there was no difference in willingness to pay between the two treatment conditions. We also look at heterogeneity across class identification and attitudes toward redistribution, and find that support for a more equal society reduces the advantage of the growth appeal.
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Smith, Maureen. Habitat Evaluation Procedures (HEP) Report; Weig [Weir] Property Pend Oreille National Wildlife Refuge, Technical Report 1997-1998. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/947096.

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Helton, Jon C., Dusty Marie Brooks, and Cedric Jean-Marie Sallaberry. Property Values Associated with the Failure of Individual Links in a System with Multiple Weak and Strong Links. Office of Scientific and Technical Information (OSTI), February 2018. http://dx.doi.org/10.2172/1423533.

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Harman, Oliver, Anders Jensen, Farria Naeem, Moussa Saab, Shahrukh Wani, and Nick Wilkinson. COVID-19 and taxes: Policies for the post-pandemic recovery. The International Growth Centre, January 2021. http://dx.doi.org/10.35489/bsg-igc-pb_2021/1.

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The COVID-19 pandemic has placed unprecedented strain on public finances across developing countries. Large fiscal responses and weak economic activity have widened deficits and increased public debt, which for many will be unsustainable over the medium-term. It is important for policymakers to consider policies for mobilising additional revenue. To this end, this policy brief discusses reform options across four types of taxes: wealth, property, consumption, and corporate income. Wealth taxes are underutilised as a policy tool. There is an opportunity to leverage them in response to COVID-19 as they can help reduce inequality and pave the way for equitable recovery. Linked to this option is the expansion of taxes on land and property, targeting the most visible form of wealth in most countries. The brief also outlines policy recommendations on more conventional tools: consumption and corporate taxes, which can be used more effectively to raise revenue by, for example, rationalising tax expenditures and using technology.
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Johnson Gaither, Cassandra. “Have not our weary feet come to the place for which our fathers sighed?”: heirs’ property in the southern United States. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 2016. http://dx.doi.org/10.2737/srs-gtr-216.

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7

Johnson Gaither, Cassandra. “Have not our weary feet come to the place for which our fathers sighed?”: heirs’ property in the southern United States. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 2016. http://dx.doi.org/10.2737/srs-gtr-216.

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Iffat, Idris. Anti-corruption Measures in Post-conflict Reconstruction. Institute of Development Studies, June 2022. http://dx.doi.org/10.19088/k4d.2022.082.

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Corruption risks in post-conflict reconstruction are high, notably due to the typically large influx of international aid coupled with weak/illegitimate governments and low state capacity. Combatting corruption in post-conflict settings is vital in the short- and medium-term to promote development and growth, and in the long-term to prevent renewed conflict. Anti-corruption efforts can focus on strengthening the rule of law; public financial management; civil service reform to promote meritocratic hiring, proper training and proper remuneration; promoting transparency and accountability – on the part of both donors as well as recipient governments; and promoting external accountability mechanisms of the media and civil society.
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Hawley. PR-015-11707-R01 Test Diagnostic Methods for Turbine Gas Meters. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2013. http://dx.doi.org/10.55274/r0010671.

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Similar to most metering technologies, turbine meters are known to be affected by abnormal flow or abnormal mechanical conditions which can cause bias in flow measurement. These types of flow conditions include blockage at the flow meter or straightening vanes, grime or liquid contamination on the internal meter components, damage to the internal meter components, and pulsation in the flow. With the introduction of ultrasonic and Coriolis meters for gas applications, the natural gas industry has embraced the concept of meters with embedded diagnostic capabilities. These capabilities allow the detection of potential problems with the flow behavior or meter condition that may lead to measurement error. Diagnostic measurements also exist for turbine meters. Some turbine meter manufacturers provide techniques for diagnosing proper meter performance through approaches that include unique design attributes (e.g., dual-rotors) or by monitoring the characteristics (shape, timing, etc.) of the pulses produced as blades pass a sensor. Various analog and digital signal analysis methods exist to interpret the output pulse characteristics to determine meter condition attributes such as bent blades and bearing wear. The objective of this research was to assess, through flow testing, the ability of various diagnostic methods to detect abnormal flow and abnormal mechanical conditions for both single and dual-rotor turbine meters. A secondary objective was to determine the amount of flow measurement error that could be present for the various flow conditions that were tested. The approach was to test three different diagnostic methods on a single-rotor and dual-rotor turbine meter at the Metering Research Facility at Southwest Research Institute. The selected diagnostic methods were the Smith MeterTM AccuLERT II from FMC Technologies, TurbinScope from Elster-Instromet, and The Turbo Corrector from Mercury Instruments. Tests were performed under controlled conditions and were designed to determine the ability of the selected diagnostics to detect various levels of flow meter or tube bundle blockage, grime buildup on the rotor or rotor bearings, damage to the rotor, or flow pulsations.
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Megersa, Kelbesa. Tax Transparency for an Effective Tax System. Institute of Development Studies (IDS), January 2021. http://dx.doi.org/10.19088/k4d.2021.070.

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This rapid review examines evidence on the transparency in the tax system and its benefits; e.g. rising revenue, strengthen citizen/state relationship, and rule of law. Improvements in tax transparency can help in strengthening public finances in developing countries that are adversely affected by COVID-19. The current context (i.e. a global pandemic, widespread economic slowdown/recessions, and declining tax revenues) engenders the urgency of improving domestic resource mobilisation (DRM) and the fight against illicit financial flows (IFFs). Even before the advent of COVID-19, developing countries’ tax systems were facing several challenges, including weak tax administrations, low taxpayer morale and “hard-to-tax” sectors. The presence of informational asymmetry (i.e. low tax transparency) between taxpayers and tax authorities generates loopholes for abuse of the tax system. It allows the hiding of wealth abroad with a limited risk of being caught. Cases of such behaviour that are exposed without proper penalty may result in a decline in the morale of citizens and a lower level of voluntary compliance with tax legislation. A number of high-profile tax leaks and scandals have undermined public confidence in the fairness of tax systems and generated a strong demand for effective counteraction and tax transparency. One of the key contributing factors to lower tax revenues in developing countries (that is linked to low tax transparency) is a high level of IFFs. These flows, including international tax evasion and the laundering of corruption proceeds, build a major obstacle to successful DRM efforts. Research has also identified an association between organisational transparency (e.g. transparency by businesses and tax authorities) and stakeholder trust (e.g. between citizens and the state). However, the evidence is mixed as to how transparency in particular influences trust and perceptions of trustworthiness.
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