Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength-ductility combination

被引：16

作者：

Dasari, S. ^{[1
]}

Jagetia, A. ^{[1
]}

Soni, V. ^{[1
]}

Gwalani, B. ^{[1
]}

Gorsse, S. ^{[2
]}

Banerjee, R. ^{[1
]}

机构：

[1] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA

[2] Univ Bordeaux, CNRS, Bordeaux INP, ICMCB,UMR 5026, F-33600 Pessac, France

来源：

MATERIALS RESEARCH LETTERS | 2020年 / 8卷 / 11期

关键词：

High entropy alloys; complex concentrated alloys; multicomponent intermetallic precipitation; multi-phase microstructure; mechanical properties; HIGH-ENTROPY ALLOY; MULTICOMPONENT;

D O I：

10.1080/21663831.2020.1777215

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Impact statement This paper reports a novel multi-phase microstructure in a HEA/CCA similar to the microstructure observed in dual-phase stainless steel. This report exemplifies the novelty of HEA/CCA compositional space. Guided by thermodynamic modeling, engineering phase transformation pathways via thermo-mechanical processing, in a complex concentrated alloy/high entropy alloy (HEA) of composition Al0.3CoFeNi, lead to a novel multi-scale microstructure consisting of fine-scale FCC + L1(2)grains mixed with B2 + BCC grains. The two-step pathway comprises initial decomposition of the parent single-phase FCC to form a fine-grained FCC + B2 microstructure, which further decomposes in the second step into the complex four-phase mixture, exhibiting an excellent combination of tensile yield stress of similar to 1490 MPa, ultimate tensile strength of similar to 1663 MPa, with a good ductility of similar to 12% at room temperature.

引用

页码：399 / 407

页数：9

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