Tensile yield strength of a single bulk Al0.3CoCrFeNi high entropy alloy can be tuned from 160 MPa to 1800 MPa
Tensile yield strength of a single bulk Al0.3CoCrFeNi high entropy alloy can be tuned from 160 MPa to 1800 MPa
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DOI：
10.1016/j.scriptamat.2018.10.023
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发表时间：
2019-03-15
影响因子：
6
通讯作者：
Banerjee, Rajarshi
中科院分区：
文献类型：
--
作者：
Gwalani, Bharat;Gorsse, Stephane;Banerjee, Rajarshi
虽然最近文献中有许多关于高熵合金屈服强度和延展性的特殊组合的报道，但还没有报道讨论在这些系统中相同合金的机械性能的非凡可调性。结果表明，通过对整体合金进行热机械加工，使Al0.3CoCrFeNi高熵合金（或复合浓缩合金）的拉伸屈服强度从160 MPa提高到1800 MPa （1.8 GPa）以上，提高了1025%。同样成分的强度变化在任何其他种类的合金中都是前所未有的。(C) 2018材料学报Elsevier Ltd.出版。版权所有。
While there have been multiple recent reports in the literature of exceptional combinations of yield strength and ductility in high entropy alloys, there have been no reports discussing the extraordinary tunability of the mechanical properties in the same alloy in these systems. This paper shows that the tensile yield-strength of a single Al0.3CoCrFeNi high entropy alloy (or complex-concentrated alloy), can be enhanced from 160 MPa to over 1800 MPa (1.8 GPa), a 1025% increase, via microstructural engineering enabled by thermo-mechanical processing of the bulk alloy. Such strength variations for the same composition are unprecedented in any other class of alloys. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.