Strength-ductility synergy of additively manufactured (CoCrNi)87Al13 medium entropy alloy with heterogeneous multiphase microstructure

被引：20

作者：

Zheng, Mengyao ^{[1
]}

Li, Chuanwei ^{[1
]}

Ye, Zhenhua ^{[1
]}

Zhang, Xinyu ^{[1
]}

Yang, Xudong ^{[1
]}

Wang, Qing ^{[3
]}

Gu, Jianfeng ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Inst Mat Modificat & Modelling, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[3] Shanghai Univ, Inst Mat, Lab Microstruct, Shanghai 200444, Peoples R China

来源：

SCRIPTA MATERIALIA | 2023年 / 222卷

基金：

中国国家自然科学基金;

关键词：

Additive manufacturing; Medium -entropy alloy; Heterogeneous multiphase microstructure; Mechanical properties; Fracture mechanisms; CORROSION PROPERTIES; MECHANICAL-PROPERTIES; PHASE; EVOLUTION; STEEL; FCC;

D O I：

10.1016/j.scriptamat.2022.115016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, a (CoCrNi)87Al13 medium-entropy alloy was fabricated by using laser-based directed energy deposition (L-DED). The yield strength and ultimate tensile strength of the (CoCrNi)87Al13 alloy were improved by 67% and 59%, respectively, compared with those of a L-DEDed CoCrNi alloy, and the ultimate elongation remained at 24%. A heterogeneous multiphase microstructure with multiscale ordered/disordered body-centered cubic phases was obtained by adding Al during the rapid solidification and thermal cycle history of the L-DED. The heterogeneous multiphase microstructure was closely correlated with the mechanical performance improvement, deformation, and fracture mechanisms of the alloys.

引用

页数：7

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