Tensile yield strength of a single bulk Al0.3CoCrFeNi high entropy alloy can be tuned from 160 MPa to 1800 MPa

SCRIPTA MATERIALIA

卷:162

Article

Gwalani, Bharat^1,2  Gorsse, Stephane^3,4  Choudhuri, Deep^1,2  Zheng, Yufeng⁵  Mishra, Rajiv S.^1,2  Banerjee, Rajarshi^1,2 

[1] Univ North Texas, Adv Mat & Mfg Proc Inst, Denton, TX 76207 USA

[2] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76207 USA

[3] CNRS, ICMCB, UMR 5026, F-33600 Pessac, France

[4] Bordeaux INP, ENSCBP, F-33600 Pessac, France

[5] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19th Ave, Columbus, OH 43210 USA

关键词: High entropy alloys;    Characterization;    Mechanical properties;    Complex concentrated alloys;    Clusters;   

DOI  :  10.1016/j.scriptamat.2018.10.023

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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