Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)94Ti3Al3 Medium Entropy Alloys

被引：35

作者：

Yi, Hai-long ^{[1
]}

Wei, Daixiu ^{[2
]}

Wang, Yingchen ^{[3
]}

Wang, Liqiang ^{[3
]}

Fang, Ming-yang ^{[1
]}

Yang, Kang ^{[1
]}

Kato, Hidemi ^{[2
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China

[2] Tohoku Univ, Inst Mat Res, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[3] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

METALS | 2020年 / 10卷 / 10期

基金：

中国博士后科学基金; 日本学术振兴会; 中国国家自然科学基金;

关键词：

medium entropy alloy; hot deformation; recrystallization; constitutive equation; microstructure; CR-MO ALLOY; EVOLUTION; MICROSTRUCTURE; FLOW;

D O I：

10.3390/met10101341

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The CoCrNi and precipitate-hardened (CoCrNi)(94)Ti3Al3 medium entropy alloys (MEAs) have attracted much attention, due to their exceptional mechanical properties, whereas the hot deformation characteristics have not been revealed. In the present study, we investigated the dynamic recrystallization behavior and microstructure evolutions of the two MEAs hot-compressed at single-phase temperatures. The constitutive equation was obtained, and microstructures were observed. Discontinuous dynamic recrystallization acted as a key mechanism of grain refinement at a relatively higher temperature and lower strain rate, which leads to the formation of a homogeneous grain structure. The addition of Ti and Al promoted dynamic recrystallization due to the solid solution hardening effect. The results provide valuable guidelines for microstructure refinement via thermomechanical processing.

引用

页码：1 / 14

页数：14

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