Relevant bibliographies by topics / SPECIFIC WEAR RATE (K)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'SPECIFIC WEAR RATE (K)'

Author: Grafiati
Published: 16 January 2024

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Journal articles on the topic "SPECIFIC WEAR RATE (K)"

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Arieira, Ana, Sara Madeira, Flávio Rodrigues, and Filipe Silva. "Tribological Behavior of TiO2 PEEK Composite and Stainless Steel for Pediatric Crowns." Materials 16, no. 6 (2023): 2420. http://dx.doi.org/10.3390/ma16062420.

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Dental decay still presents a major health problem among children. Its treatment usually requires the use of stainless steel crowns. This study compares the wear behavior of 316 L stainless steel and polyetheretherketone (PEEK) composite under identical test conditions. The wear tests were conducted in a reciprocating ball-on-plate tribometer (Plint TE67/R) using alumina balls as a counterface and artificial saliva as a lubricant at 37 °C to faithfully mimic oral conditions. The coefficient of friction (COF) and specific wear rate (k) values were determined and SEM/EDS examinations were perfor
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Carmona-Cervantes, Isabel Ariadna, Iván Campos-Silva, Ulises Figueroa-López, and Andrea Guevara-Morales. "Effect of Recycled Polyvinyl Butyral (rPVB) Addition on the Tribological Performance of Glass–Fiber Reinforced Polyamide (PAGF) during Reciprocating Sliding Wear Conditions." Polymers 15, no. 11 (2023): 2580. http://dx.doi.org/10.3390/polym15112580.

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Plastic recycling in the automotive industry is a priority. In this study, the effect of adding recycled polyvinyl butyral (rPVB) from automotive windshields on the coefficient of friction (CoF) and specific wear rate (k) of a glass–fiber reinforced polyamide (PAGF) is investigated. It was found that, at 15 and 20 wt.% of rPVB, it acts as a solid lubricant, reducing CoF and k up to 27% and 70%, respectively. Microscopical analysis of the wear tracks showed that rPVB spreads over the worn tracks, forming a lubricant layer, which protects the fibers from damage. However, at lower rPVB content, f
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da Cruz, Crislaine, Ivan Mathias, Mariza Veiga Senk, Gelson Biscaia de Souza, and Francisco Carlos Serbena. "Effect of crystal size on the tribological properties of lithium disilicate glass-ceramics sliding against alumina and tungsten carbide spheres." Industrial Lubrication and Tribology 72, no. 9 (2020): 1109–16. http://dx.doi.org/10.1108/ilt-08-2019-0352.

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Purpose Lithium disilicate glass-ceramics (LS2 GC) are widely used as dental prosthetics and dental restorations. Based LS2 GC have hardness and translucency similar to that of natural teeth. This study aims to investigate the tribological features of LS2 GC with crystalline volume fraction of 64% and different crystal sizes from 8 µm to 34 µm for different counterparts. Design/methodology/approach The tribological behavior was investigated using a pin-on-disc tribometer with alumina and tungsten carbide (WC) spheres, applied load of 5 N and sliding speed of 5 cm/s at normal conditions. The co
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Hvizdoš, P., M. Besterci, P. Kulu, and T. Kvačkaj. "Tribological Characteristics of Copper Based Composites with Al2O3 Particles at Various Temperatures." High Temperature Materials and Processes 32, no. 5 (2013): 437–42. http://dx.doi.org/10.1515/htmp-2012-0161.

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AbstractTwo copper based composites: an experimental Cu-Al2O3 and commercial GlidCop AL-60 grade (with 1.1 wt.% Al2O3) with grains size approximately 1–2 µm were treated by Equal Channel Angular Pressure (ECAP) technique in order to induce severe plastic deformation and to reduce the grain size by about an order of magnitude. Microstructure of the as-received and ECAPed states of both systems were observed. Hardness of the experimental materials was measured by instrumented indentation. Tribological properties were studied by pin-on-disk technique in dry sliding against a steel ball at a vario
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Karim, Zailan, Mohd Zaki Nuawi, Jaharah A. Ghani, Shahrum Abdullah, and Mariyam Jameelah Ghazali. "Wear Monitoring of Connecting Rod Bearing via Air-Borne Method Analyzed by Using I-KazTM Multi Level Value." Advanced Materials Research 445 (January 2012): 941–46. http://dx.doi.org/10.4028/www.scientific.net/amr.445.941.

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Different techniques have been developed in the area of bearing wear monitoring. This paper proposes a different experimental study on bearing wear monitoring by using an airborne technique. The data captured in the airborne technique will be analyzed by using I-kazTM Multi Level (7Z) coefficient and then will be correlated with the conventional specific wear rates, K. The wear tests were carried out by using a pin-on-disc configuration at a sliding speed of 7.85 m/s. A set of sliding distance ranging from 20 160 km at a fixed load of 200 N was utilized and the K value was measured at every in
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Singh, Paramjit, Harish Pungotra, and Nirmal S. Kalsi. "Parametric optimization of deep cryogenic treatment for the wear response of implant material UNS R56700: Taguchi’s approach." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 234, no. 1 (2019): 61–73. http://dx.doi.org/10.1177/0954411919884775.

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Using the Taguchi’s robust design of experiments methodology, this article presents the systematic identification and optimization of most influential parameters of deep cryogenic treatment process to minimize the specific wear rate of UNS R56700 (Ti6Al7Nb). In addition to the different soaking durations (0–96 h) at 77 K and different tempering temperatures (room temperature, 403–523 K), three commonly used variables of pin-on-disk test, namely, sliding speed (1.047–2.723 ms−1), contact pressure (0.641–1.282 MPa), and sliding time (600–2280 s) were chosen to conduct the tests. During dry slidi
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Pessolano Filos, Irene, Raffaella Sesana, Massimiliano Di Biase, and Rocco Lupoi. "New Abrasive Coatings: Abraded Volume Measurements in Ceramic Ball Production." Journal of Manufacturing and Materials Processing 5, no. 3 (2021): 81. http://dx.doi.org/10.3390/jmmp5030081.

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Technological progress in hybrid bearings developed high wear and abrasion resistant materials for rolling elements. The manufacturing process of bearing balls presents new challenges, as nowadays, it requires time-consuming and costly processes. In this frame, the bearing manufacturing industry is demanding improvements in materials, geometry, and processes. This work aims to investigate new abrasive coatings for grinding wheels for Si3N4 ball manufacturing. Tribological pin on disk tests are performed on samples of grinding materials (disk) versus a Si3N4 ball (pin). Two samples of specimens
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Osman, Omer, Necar Merah, Mohammed Abdul Samad, Amjad Al-Shaarawi, and Meshari Alshalan. "Effects of Drilling Parameters and Mud Types on Wear Factors and Mechanisms of SM2535 Casings." Lubricants 11, no. 10 (2023): 420. http://dx.doi.org/10.3390/lubricants11100420.

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This work aims to explore the impact of side loads, drill-pipe tool-joint (DP-TJ) speed (rpm), and mud type on the austenitic stainless steel SM2535-110 casing wear characteristics. Actual field drill pipe tool joints, casings, and drilling muds are used in this study. The results of the study show that under both types of lubrication, the wear volume increased with radial load and DP-TJ speed. SM2535-110 casing specimens tested under oil-based mud (OBM) lubrication had higher casing wear volumes than those obtained under water-based mud (WBM) lubrication. This unexpected behavior is mainly du
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Hernández-Sierra, M. T., R. Ortega-Álvarez, M. G. Bravo-Sánchez, L. D. Aguilera-Camacho, J. S. García-Miranda, and K. J. Moreno. "Tribological improvement of hardened and tempered AISI 4140 steel against Al2O3 by using bio-lubricant." MRS Advances 2, no. 62 (2017): 3873–81. http://dx.doi.org/10.1557/adv.2018.2.

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ABSTRACTAISI 4140 steel is a popular low alloy steel due to its wide applications as workpiece in the metal-mechanic industry; there are extensive research about surface modification to enhance its properties for specific applications. The focus of this study was to investigate the influence of the nature of lubricants, mineral and vegetable oils, on the tribological performance of the hardened and tempered AISI 4140 steel against alumina (Al2O3). For this purpose, friction tests were conducted in a pin on disc tribometer according to ASTM standard G 99-05, at room temperature of 25 °C and in
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Neamah, Z. J., and S. H. Mahdi. "Effect of zirconia addition on thermal and mechanical properties of poly-methyl methacrylate composites." Digest Journal of Nanomaterials and Biostructures 18, no. 3 (2023): 927–32. http://dx.doi.org/10.15251/djnb.2023.183.927.

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The goal of this study was to improve the mechanical and thermal properties of PolyMethyl Meth Acrylate (PMMA) by adding Zirconia nanoparticles in various weight fraction percentages (0, 1, 1.5, 2, 2.5, 3)%. The cast technique was utilized of to prepare the (PMMA/zirconia) nanocomposites. The thermal and mechanical characterized of (PMMA/zirconia) nanocomposites were studied. Increased zirconia percentages in (PMMA/zirconia) nanocomposites lead to increase thermal conductivity (K), glass transition temperature, specific heat capacity (Cp), effusivity, impact strength, hardness, flexural streng
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Dissertations / Theses on the topic "SPECIFIC WEAR RATE (K)"

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Cora, Omer Necati. "DEVELOPMENT OF RAPID DIE WEAR TEST METHOD FOR ASSESSMENT OF DIE LIFE AND PERFORMANCE IN STAMPING OF ADVANCED/ULTRA HIGH STRENGTH STEEL (A/UHSS) SHEET MATERIALS." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/2003.

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Automotive companies are actively pursuing to increase the use of high-strength-lightweight alloys such as aluminum, magnesium, and advanced/ultra high-strength steels (A/UHSS) in body panel and structural part applications to achieve fuel efficiency while satisfying several environmental and safety concerns. A/UHSS sheet materials with higher strength and crashworthiness capabilities, in comparison to mild steel alloys, are considered as a near-term (i.e., ~5 years) choice of material for body and structural components due to their relatively low cost when compared with other lightweight mate
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Mazen, Ahmed Z., Nejat Rahmanian, Iqbal M. Mujtaba, and A. Hassanpour. "Estimation of Dulling Rate and Bit Tooth Wear Using Drilling Parameters and Rock Abrasiveness." 2019. http://hdl.handle.net/10454/17485.

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No<br>Optimisation of the drilling operations is becoming increasingly important as it can significantly reduce the oil well development cost. One of the major objectives in oil well drilling is to increase the penetration rate by selecting the optimum drilling bit based on offset wells data, and adjust the drilling factors to keep the bit in good condition during the operation. At the same time, it is important to predict the bit wear and the time to pull out the bit out of hole to prevent fishing jobs. Numerous models have been suggested in the literature for predicting the time to pull the
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Books on the topic "SPECIFIC WEAR RATE (K)"

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Schulev-Steindl, Eva, Monika Hinteregger, Gottfried Kirchengast, et al., eds. Climate Change, Responsibility and Liability. Nomos Verlagsgesellschaft mbH & Co. KG, 2022. http://dx.doi.org/10.5771/9783748930990.

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The recent past has seen a rise in litigation seeking to hold specific private and public actors liable for their contribution to and impacts of climate change, with a relatively low success rate. This highlights the need for further research into the reasonable and just distribution of responsibility for mitigation and adaptation. This book unites renowned researchers from various disciplines to explore the challenges and opportunities of assigning responsibility and liability for climate change to specific actors. Thereby, the importance of interdisciplinary scientific dialogue on climate ch
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Skiba, Grzegorz. Fizjologiczne, żywieniowe i genetyczne uwarunkowania właściwości kości rosnących świń. The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 2020. http://dx.doi.org/10.22358/mono_gs_2020.

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Bones are multifunctional passive organs of movement that supports soft tissue and directly attached muscles. They also protect internal organs and are a reserve of calcium, phosphorus and magnesium. Each bone is covered with periosteum, and the adjacent bone surfaces are covered by articular cartilage. Histologically, the bone is an organ composed of many different tissues. The main component is bone tissue (cortical and spongy) composed of a set of bone cells and intercellular substance (mineral and organic), it also contains fat, hematopoietic (bone marrow) and cartilaginous tissue. Bones a
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Book chapters on the topic "SPECIFIC WEAR RATE (K)"

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Fujimoto, Kyoko, Leonardo M. Angelone, Sunder S. Rajan, and Maria Ida Iacono. "Simplifying the Numerical Human Model with k-means Clustering Method." In Brain and Human Body Modeling 2020. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45623-8_15.

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AbstractCurrently, the safety assessment of radio-frequency (RF) heating using computational modeling is limited by the available numerical models which are not patient specific. However, RF-induced heating depends on the physical characteristics of the patient. The numerical model generation is difficult due to the highly time-consuming segmentation process. Therefore, having fewer types of segmented structures simplifies the generation of numerical models and reduces computational burden as a result. In this study, we used the k-means clustering method to reduce the number of dielectric properties of an existing numerical model and investigated the resulting difference in specific absorption rate (SAR) with respect to the number of clusters.
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Xie, Caibo, Songhan Nie, Yiqi Tao, and Zhanpeng Lu. "Correlating IASCC Growth Rate Data to Some Key Parameters for Austenitic Stainless Steels in High Temperature Water." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_89.

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AbstractAustenitic stainless steels have been widely used for fabricating reactor core-internal components in PWRs due to its high strength, ductility and fracture toughness. The accelerated failure or degradation of austenitic stainless steel represented by IASCC has become one of the key problems affecting the safe and efficient operation of reaction core-internal in PWR nuclear power plants. IASCC is generally divided into three stages: crack initiation, crack propagation and instable fracture. Among the three stages, the crack initiation stage would occupy the major service time, the crack growth stage is featured by quasi-steady crack propagation at a certain rate, and the instable fracture stage should be avoided. Stress intensity factor K at the crack tip is often used to represent the mechanical driving force for SCC as well as IASCC.In this paper, SCC crack growth rate (CGR) data of austenitic stainless steels irradiated in high temperature water were compiled and reanalyzed to evaluate the influence of key parameters such as radiation dose and mechanical properties on IASCC sensitivity and crack growth rate of these materials in PWR nuclear power plant environment. The CGR-K curves of the irradiated materials were also analyzed. The effects of low, medium and high doses of neutron irradiation are compared, and the analysis process is illustrated with examples. In the research process, abnormal CGR and K of materials under a specific irradiation dose was found, so this phenomenon was analyzed. The CGR data and irradiation dose of austenitic stainless steel in different K range were analyzed. And proposed a way to judge the type of change:type I, type II and type III. Finally, the yield strength of the material under the same irradiation dose was found, and combined with other research data, it was further demonstrated that the neutron irradiation dose had a significant effect on the crack growth rate.
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"Wear Factor (K) and Wear Rate." In Fatigue and Tribological Properties of Plastics and Elastomers. Elsevier, 1995. http://dx.doi.org/10.1016/b978-1-884207-15-0.50106-1.

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Hiraoka, Naofumi. "Wear Life of Bonded MoS2 Film Lubricant." In Tribology [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99802.

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Bonded MoS2 film lubricants are widely used in industry as solid lubricants. It has excellent lubrication properties, but it also has characteristics that require careful consideration. As is well known, its friction and wear are greatly affected by the environmental atmosphere and its wear life depends on the pre-treatment of the substrate. It was found that in many cases the wear life could not be correctly estimated by a specific wear rate and could be explained by the fatigue life, especially under high loading conditions. The atmosphere dependent wear life can also be explained by the fatigue life.
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Parikh, Hiral H., and Piyush P. Gohil. "Composites as TRIBO Materials in Engineering Systems." In Processing Techniques and Tribological Behavior of Composite Materials. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7530-8.ch007.

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This chapter starts with the importance of composite materials over single-phase materials and further explores the importance of natural fiber reinforced composites over synthetic fiber reinforced composites followed by chemical and physical modifications of the fiber surface to enhance the adhesion between the fiber and the matrix. The chapter also focuses on the different types of wear mechanisms that lead to shutting down the industries and types of different wear test rings to measure the wear rate of a material. Current work also represents a comprehensive literature study on tribological characterisation of composite materials. In addition, it focuses composites as TRIBO material in engineering systems. The effect of tribological operating parameters like load, sliding velocity, sliding distance, temperature, and other influential parameters like fiber length, fiber volume fraction, fiber orientation, and surface treatment on friction and wear rate of composites are also described. Over the past few years composites have been dominant in the emerging materials. The applications areas of composite materials have grown steadily in the various systems of Mechanical Engineering, Civil Engineering, Electrical Engineering, Medical Engineering, and Automobile Engineering. In engineering systems, failure of parts may occur due to different types of wear mechanisms. The availability of a range of fiber reinforcements, fillers, matrices, and processing techniques offers ample scope for tailoring properties in composites as required for specific applications.
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Zhong, Jun. "Atomistic Simulation of Severely Adhesive Wear on a Rough Aluminum Substrate." In Tribology [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94025.

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In this Chapter, a severely adhesive wear on a rough aluminum (Al) substrate is simulated by molecular dynamics (MD) under a high velocity impact of a hard-asperity (a hard-tip) with the Al-asperity. Multiple simulations include effects of four factors: the inter-asperity bonding, the geometry overlap between two asperities, the impact velocity between two asperities and the starting temperature of the Al-substrate. It is observed that the deformation mechanism on the Al-substrate would involve a local melting (from 1200 to 2500 K) which forms liquid type layers (amorphous textures) in the contact area between two asperities. Also, temperature profiles on the hard-tip and the Al-substrate is depicted. Moreover, a method in the Design of Experiments (DOE) is employed to interpret above all simulations. The DOE results indicate that the inter-asperity bonding and the geometry overlap between two asperities would substantially increase the wear rate (for about 53.56% and 67.29% contributions), while the starting temperature of the Al-substrate and the impact velocity between two asperities would play less important roles (about 10.30% and 6.61%) in raising the wear rate.
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Alhaji Ibrahim, Musa, Yusuf Şahin, Auwal Ibrahim, Auwalu Yusuf Gidado, and Mukhtar Nuhu Yahya. "Specific Wear Rate Modeling of Polytetraflouroethylene Composites Via Artificial Neural Network (ANN) and Adaptive Neuro Fuzzy Inference System (ANFIS) Tools." In Virtual Assistant [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95242.

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Lately, artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) models have been recognized as potential and good tools for mathematical modeling of complex and nonlinear behavior of specific wear rate (SWR) of composite materials. In this study, modeling and prediction of specific wear rate of polytetraflouroethylene (PTFE) composites using FFNN and ANFIS models were examined. The performances of the models were compared with conventional multilinear regression (MLR) model. To establish the proper choice of input variables, a sensitivity analysis was performed to determine the most influential parameter on the SWR. The modeling and prediction performance results showed that FFNN and ANFIS models outperformed that of the MLR model by 45.36% and 45.80%, respectively. The sensitivity analysis findings revealed that the volume fraction of reinforcement and density of the composites and sliding distance were the most and more influential parameters, respectively. The goodness of fit of the ANN and ANFIS models was further checked using t-test at 5% level of significance and the results proved that ANN and ANFIS models are powerful and efficient tools in dealing with complex and nonlinear behavior of SWR of the PTFE composites.
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Snizhnoi, Gennadii. "Dependence of Corrosion Resistance of Austenitic Chromium-Nickel Steels on the Magnetic State of Austenite." In Stainless Steels [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102388.

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Corrosive behavior of austenitic chromium-nickel steels from the magnetic state (parameter χ0) of austenite, pre-formed to interact with aggressive media are research. Correlation between the rate K of pitting corrosion and the specific magnetic susceptibility χ0 of austenite was experimentally established. It is experimentally established that the corrosion resistance of austenitic steels AISI304, 08Cr18Ni10, AISI 321, 08Cr18Ni10Тi (containing a low amount of δ-ferrite ∼0.005…0.5%) depends on the magnetic state of austenite: the corrosion rate of steel decreases with increases χ0 austenite. The tendency of change in the corrosion rate of austenitic alloy with a high nickel content 06Crh28NiMoCuTi (not contain δ-ferrite) has the opposite character: with increasing χ0, the corrosion rate of the alloy increases is revealed. For austenitic chromium-nickel steels, the corrosion rates of the individual (austenite (A), δ-ferrite (F), strain-induced α′-martensite (M)) and total (A + F, A + M and A + F + M) phases are determined. It is proposed to predict corrosion according to the specific magnetic susceptibility χ0 of austenite and the amount δ-ferrite.
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Ali, Salma, and James Hernandez. "Identifying In-Service Teachers' Perceptions of Developing 21st Century Skills Through Science Education Using TPACK-21 Framework." In Advances in Early Childhood and K-12 Education. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-5585-2.ch009.

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In this digital age, science teachers are continuously confronted with new emerging opportunities and challenges as a result of the rapid rate of discoveries in science and technology and information technology as well. Science educators, therefore, emphasize restructuring the education system to prepare 21st century learners to face complex challenges and prepare them to avail the opportunities at their fullest. This present study aimed to identify in-service science teachers' perceptions of developing 21st century skills through science education by employing an updated TPACK-21 framework. A mixed-methods study, using a survey-based questionnaire and focus group interviews with selected teachers, was undertaken to collect teachers' perspectives. The study revealed that when technology is used by teachers, it is often paired with specific content and pedagogically very different from what teachers are used to performing. The results highlight the need to use technology for innovation and to renovate contemporary teaching practices for 21st century learning.
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Chizoo, Esonye. "Alkali Homogeneous Catalyzed Methyl Ester Synthesis from Chrysophyllum albidum Seed Oil: An Irreversible Consecutive Mechanism Approach." In Alkaline Chemistry and Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.95519.

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This chapter considers the application of alkaline (NaOH) based catalyzed methanolysis of seed oil from Chrysophyllum albidum (African star apple) as a viable route for synthesis of methyl esters (biodiesel). Specific consideration was given to the chemical kinetics and thermodynamics of the irreversible consecutive mechanism of the process on the basis of higher application of methanol/molar ratio (&gt;3:1) as a feasible approach for generating required data for commercial scale-up of the process. The application of power rate law revealed that second order model was the best fitted model on the 328 K, 333 K and 338 K temperature and 0–100 min ranges studied. Rate constants of the glyceride hydrolysis were 0.00710, 0.00870 and 0.00910 wt% min−1 for the triglyceride (TG), 0.02390, 0.03040 and 0.03210 wt% min−1 for the diglycerides (DG) and 0.01600, 0.03710 and 0.04090 wt% min−1 for the monoglycerides (MG) at the above respective temperatures. The activation energies were 2.707, 7.30 and 23.33 kcal/mol respectively. TG hydrolysis to DG was the rate determining step. Rates of reactions were found to increase with increase temperature and mixing rate (200, 400 and 800 rpm). No optimal mixing rate was detected and the highest mixing rate of 800 rpm was the most favorable in the mixing range under investigation. The possible reason for the absence of lag period is formation of methyl esters, which acted as a solvent for the reactants, and consequently, made the reaction mixture a homogeneous single phase. The quality of the produced methyl esters were found to compare with international standards. All the results lead to more diverse and novel applications of the seed oil in biodiesel productions.
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Conference papers on the topic "SPECIFIC WEAR RATE (K)"

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Tian, Long, Mingzhu Chen, Zeyu Zheng, et al. "Real-Time Monitoring Model of PDC Bit Wear Based on GRU Neural Network." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0195.

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ABSTRACT Improving drilling efficiency is crucial in reducing drilling costs, and monitoring drill bit wear provides an intuitive reflection of drilling efficiency. However, collecting on-site parameters that directly reflect drill bit wear is challenging, and few monitoring methods are available for assessing the degree of wear. Thus, quantitatively evaluating the wear of PDC drill bits has been a persistent research challenge. Evaluating drill bit wear status mainly relies on rock breaking efficiency and mechanical specific energy. In this study, a physical model was used to calculate mechan
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Gipon, Elodie. "Improvement of FAC Maintenance Program Issued From BRT-CICERO™ via CFD Calculations." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60136.

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Flow Accelerated Corrosion (FAC) is very effective for nuclear power plant. This generalized corrosion can lead to the rupture of pipe and in some dramatic cases to casualties. During the last 20 years Electricité de France (EDF) has developed software called BRT-CICERO™ for the surveillance of the carbon steel piping system of its Nuclear Power Plants (NPPs). This software enables the operator to calculate the FAC wear rates by taking into account all the influencing parameters such as pipe isometrics, alloy content, chemical conditioning, design and operating parameters of the steam water ci
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Frick, Thomas M. "An Empirical Wear Projection Technology With Steam Generator Tube Applications and Relations to Work-Rate and Wear Simulations / Tests." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0121.

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Abstract This paper introduces an empirical Wear Projection Technology (WPT) which relies solely on data from two (or more) time-independent wear related measurements at a wear site. The development and application of this WPT insures that it is completely general in nature. Thus, WPT is potentially useful for all wear experiences where measurements and related extrapolations and interpolations can be made before a “failure” occurs. When applied to nuclear plant steam generator tubes using non-destructive examination measurements (obtained during in-service inspections) as input, WPT enables m
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Suresha, B., T. Jayaraju, Siddaramaiah, and Kunigal N. Shivakumar. "Investigations on Mechanical and Abrasive Wear Behaviour of Carbon and Glass Fabrics Reinforced Vinyl Ester Composites." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44429.

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The aim of the research article is to study the mechanical and abrasive wear behaviour of carbon and glass fabric reinforced vinyl ester composites. The measured wear volume loss increases with increasing load/abrading distance. However, the specific wear rate decreases with increase in abrading distance and load. The results showed that the highest specific wear rate is for glass fabric reinforced vinyl ester composite with a value of 8.96 × 10−11 m3/Nm and the lowest wear rate is for carbon fabric reinforced vinyl ester composite with a value of 5.84 × 10−11 m3/Nm. Mechanical properties were
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Mertiny, Pierre, Mohammad Bashar, Avinash Parashar, and Kulvinder Juss. "Technological Advances for Improved Performance and Operation of Fiber-Reinforced Polymer Piping." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25146.

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Fiber-reinforced polymer (FRP) piping has been recognized for excellent corrosion resistance and high specific properties such as its strength-to-weight ratio. Despite the positive characteristics, FRP piping has limited, albeit growing utilization in industrial service. This is in part due to initial cost when compared to conventional metallic pipe. Reduced life cycle expenditures in conjunction with operational advantages may foster an increased implementation of FRP piping. This may be achieved through installation procedures, longevity and operational capabilities that are superior to thos
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Sakano, Y., T. Iwai, and Y. Shoukaku. "Friction and Wear Properties of PTFE Composites Against 6061-T6 Aluminum Alloy Under Hydrogen Atmosphere." In ASME/STLE 2011 International Joint Tribology Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ijtc2011-61258.

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The friction and wear properties of polymer were investigated under a hydrogen atmosphere, by using PTFE (polytetrafluoroethylene) and two kinds of PTFE composites. Experiments were also conducted in air, nitrogen, and vacuum environment. The experiment carried out by pin-on-disk friction and wears apparatus in the vacuum chamber. Pin specimens are no filling PTFE, Gr-filled PTFE (Gr filled with 25 wt%) and MoS2–filled PTFE (MoS2 filled with 25 wt%). Friction disk is aluminum alloy 6061-T6 with 0.02μm surface roughness. Aluminum alloy 6061-T6 is able to use for apparatus for hydrogen. After ex
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Sawae, Y., A. Yamaguchi, K. Nakashima, T. Murakami, and J. Sugimura. "Wear Behavior of Polymeric Sealing Material in Gaseous Hydrogen." In STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71225.

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Wear behavior of polymeric sealing material sliding against austenitic stainless steel was evaluated within gaseous hydrogen atmosphere to ensure the durability and longevity of polymeric seals used in fuel cell vehicles and related hydrogen infrastructures. In this study, unfilled polytetrafluoroethylene (PTFE) was considered as a representative polymeric material for seals and its wear behavior was evaluated by using 3pin-on-disk wear tester coupled with the environmental test chamber. Results indicated that the specific wear rate of unfilled PTFE became significantly smaller in gaseous hydr
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Ayvaz, Safiye İpek, and Mehmet Ayvaz. "Investigation of the Wear Behavior of AA6082 Against Different Counterparts." In International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.045.

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In this study, the effect of different counterparts on the wear resistance of AA6082 aluminum alloy was investigated. In tests using pin-on-disk method, 6 mm diameter Al2O3, 100Cr6 and WC-6Co balls were used as counterparts. The tests were carried out using 500 m sliding distance and 5N load. The lowest specific wear rate was measured as 7.58x10-4 mm3/Nm in WC-6Co / AA6082 couple, and the highest value was measured as 9.71x10-4 mm3/Nm in 100Cr6/AA6082 couple. In the Al2O3/AA6082 couple, the specific wear rate of the AA6082-T6 sample was determined as 8.23x10-4 mm3/Nm.While it was observed that
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Uchiyama, Yoshitaka, Tomoaki Iwai, Naoya Amino, and Kiichiro Shimosaka. "Effect of Crosslink Density and Mechanical Properties on the Wear of Silica-Filled Styrene-Butadiene Rubbers." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63476.

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In this study the effects of silica size (or specific surface area), mechanical properties and crosslink density on the wear of silica-filled SBRs (styrene butadiene rubbers) were examined. The modulus of each silica-filled SBR examined was proportional to crosslink density. The wear rate of silica-filled SBRs was reduced as the modulus and crosslink density increased. The wear rates increased as the specific surface area of the silica fill particles decreased, when the content of silane coupling agent was constant. As a result, the wear rate was shown to be lower as the modulus and crosslink
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Singh, S. "Machine learning: approaches to predicting reliability and developing maintenance strategies." In Structural Health Monitoring. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902455-40.

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Abstract. Current approaches to maintenance of rolling stock bogies are focused on compliance to wear limits as stipulated by OEM specifications. OEM recommendations are critical to providing an industry wide approach to safety and compliance. These are not operation specific and are often not the most cost-effective solutions. A system approach to reliability is an established approach that is applied in less complex systems where the relationships between components are well defined with historical data and predictable conditions. Extending this approach to more complex multi-variate systems
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Reports on the topic "SPECIFIC WEAR RATE (K)"

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Hansen, Peter J., and Amir Arav. Embryo transfer as a tool for improving fertility of heat-stressed dairy cattle. United States Department of Agriculture, 2007. http://dx.doi.org/10.32747/2007.7587730.bard.

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The overall objective of the current proposal is to develop procedures to improve the pregnancy rate achieved following transfer of fresh or cryopreserved embryos produced in the laboratory into heat-stress recipients. The overall hypothesis is that pregnancy rate in heat-stressed lactating cows can be improved by use of embryo transfer and that additional gains in pregnancy rate can be achieved through development of procedures to cryopreserve embryos, select embryos most likely to establish and maintain pregnancy after transfer, and to enhance embryo competence for post-transfer survival thr
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