High Hardness and Wear Resistance in AlCrFeNiV High-Entropy Alloy Induced by Dual-Phase Body-Centered Cubic Coupling Effects
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High-entropy alloys (HEAs) with high hardness are promising materials for advanced industrial manufacturing. In this study, the AlCrFeNiV HEA was designed and successfully prepared using a plasma instantaneous process. The hardness test showed that AlCrFeNiV had a high hardness of 1076 ± 15 HV, which was much higher than those reported in the literature. The microstructure of AlCrFeNiV was composed of two different types of body-centered cubic (BCC) structures, BCC1 (Al, Cr, Fe, and Ni) and BCC2 (enriched V and Cr). A mixture of different BCC systems produced solution strengthening, which was responsible for the superior hardness. Moreover, the reciprocating sliding wear behavior of HEA against Al2O3 balls under dry and lubricated conditions at ambient temperature was investigated. The wear rates of AlCrFeNiV against Al2O3 under dry wear and lubrication were 17.2 × 10-5 mm3 N-1·m-1 and 12.4 × 10-5 mm3N-1·m-1, respectively, which were of the same order of magnitude as the wear rates of BCC HEAs. Regardless of the dry wear or wear with lubrication, the wear mechanism of the HEA was abrasive and delamination wear.Keywords:
Reciprocating motion
High-Entropy Alloys
Vickers hardness test
Reciprocating motion
Brass
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Under laborator conditions,impact abrasive wear resistame of high-V alloy,high-Cr white cast iron and bainitic steel was investigated with amsler-135 type wear machine. The results show that the abrasive wear resistance of high-V alloy is better than those of the two usual materials applied in test.The test results of abrasive wear resistance of three wear resistant materials are analysed through microstructure.
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Wear is one of the main surface failure mechanisms in materials and it will play a leading role in substitutive dental biomaterials. The aim of the present study is to compare the abrasive wear of different metallic materials used in dental applicati
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Cryogenic Treatment
Carbon steel
High carbon
Carbon fibers
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Improvement of wear resistance and durability of machine elements with sliding friction pairs is the important tribological problems. The wear resistance
has been determined with many configurative parameters, technological parameters, and operational parameters. In this study kinematics of cylindrical joint (CJ), whose motion is reciprocating and rotating, and influence of various parameters on wear resistance of friction pair was investigated.
Reciprocating motion
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A comparison of abrasive wear between uni-directional friction and reciprocating friction was made on annealed plain carbon steels sliding aginst fresh Al2O3 abrasive clothes and repeatedly used ones. Wear tests of the two sliding modes were carried out with a testing machine remodeled from a lathe under similar conditions in air. The experiments indicated that in case of fresh abrasive clothes, a heavier wear always resulted from uni-directional friction, and the wear differrences between the two sliding modes increased with increasing normal forces and abrasive garin sizes; in case of repeatedly used ones, a heavier wear resulted from reciprocating friction in steady conditions. The wear differences between the two sliding modes can be explained in terms of the differences in the degree of work-hardening of the rubbed surfaces and the amount of the abrasive grains being blunted, fractured, eroded out of the resin base, clogged and capped with metal chips etc.
Reciprocating motion
Spall
Work hardening
Hardening (computing)
Adhesive wear
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Surface layer
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Abstract : The article examines the dependence of wear resistance of metals during abrasive wear on the basic physicomechanical parameters. The dependence of wear resistance and critical velocity on the same parameters during friction of metals on an abrasive surface indicates the presence of thermoelastic processes in the surface layer, influencing wear resistance. (Author)
Thermoelastic damping
Surface layer
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