Precipitation growth of a-phase along the interface in CoCrFeMnNi high-entropy alloy

被引：10

作者：

Lee, Unhae ^{[1
,2
]}

机构：

[1] BISTEP Evaluat & Anal Reg Innovat Program Div, Pusan 48058, South Korea

[2] POSCO Tech Res Labs, Gwangyang 57807, South Korea

来源：

VACUUM | 2023年 / 213卷

关键词：

High-entropy alloy; Precipitation; a-phase; (in)Coherent interface; Strengthening; SIGMA-PHASE; MECHANICAL-PROPERTIES; STABILITY; MICROSTRUCTURE; CRMNFECONI;

D O I：

10.1016/j.vacuum.2023.112103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The equiatomic CoCrFeMnNi high-entropy alloy (HEA) has a face-centered cubic (FCC) single-phase structure with a good balance of yield strength and elongation due to the twinning-induced plasticity (TWIP). In order to increase the usability of FCC-structured HEA, it is necessary to develop its mechanical properties. The hard precipitation of the a-phase might be a promising strengthening mechanism. Furthermore, developing an advanced manufacturing process is necessary to apply the a-phase-containing HEAs. This study focused on a-phase formation during annealing after hot compression of a CoCrFeMnNi HEA. The a-phase was primarily observed near the high-angle grain boundaries and acted as the obstacle for the boundary migration, resulting in grain growth during annealing. In addition, the development of the a-phase according to the interface type was investigated. This microstructure increased the hardness of the alloy and may contribute to the further development of high-strength HEAs.

引用

页数：5

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