Mechanical properties of the high-entropy alloy Al0.5CoCrCuFeNi in various structural states at temperatures of 0.5–300 K
| Autor: | Yu. A. Semerenko, Kornel Csach, M. A. Laktionova, A. V. Podolskiy, S. E. Shumilin, Jozef Miškuf, Elena D. Tabachnikova, M.A. Tikhonovsky |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Alloy General Physics and Astronomy Young's modulus 02 engineering and technology Plasticity engineering.material 021001 nanoscience & nanotechnology 01 natural sciences symbols.namesake 0103 physical sciences engineering symbols Compressibility Mechanical resonance Composite material 0210 nano-technology Thermal analysis Spectroscopy Quasistatic process |
| Zdroj: | Low Temperature Physics. 43:1108-1118 |
| ISSN: | 1090-6517 1063-777X |
| Popis: | The mechanical properties and fracture characteristics of the high-entropy alloy Al0.5CoCrCuFeNi are studied in different structural states (cast and after two heat treatments) at temperatures of 0.5–300 K with quasistatic deformation by uniaxial compression and distension. Mechanical resonance spectroscopy is used to measure the temperature variations of the Young modulus in the different structural states. It is found that heat treatment of the samples leads to an increase (by roughly 25%) in the Young modulus, the nominal yield point τ0.2, and the deforming stress. The form of the deformation curves is analyzed. The temperature interval for the transition from smooth to discontinuous plastic flow is determined. For the cast state the differences in τ0.2 under tension and compression are determined, an anomalous temperature dependence of τ0.2 (for temperatures in the 0.5–4.2 K range) is discovered, and thermal activation analysis of the experimental data yields empirical estimates for the parameters of ... |
| Databáze: | OpenAIRE |
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