High strength and ductility in a dual-phase hetero-structured AlCoCrFeNi2.1 eutectic high-entropy alloy by powder metallurgy

被引：17
作者：
Peng, Siyuan [1 ,2 ]
Feng, Shuai [3 ]
Jiang, Zhenfei [2 ]
Ren, Jie [3 ]
Zhang, Shengbiao [3 ]
Liu, Yanfang [4 ]
Zhang, Liang [1 ]
He, Wenyi [2 ]
Liu, Zhongqiang [2 ]
Guan, Shuai [3 ,5 ]
Xiao, Zhiyu [2 ,6 ]
Chen, Wen [3 ,5 ]
机构：
[1] Xiamen Univ Technol, Sch Mat Sci & Engn, Fujian Key Lab Funct Mat & Applicat, Xiamen, Peoples R China
[2] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Met Mat, Guangzhou, Peoples R China
[3] Univ Massachusetts, Dept Mech & Ind Engn, Amherst, MA USA
[4] Hohai Univ, Sch Mat Sci & Engn, Changzhou, Peoples R China
[5] Univ Massachusetts, Dept Mech & Ind Engn, Amherst, MA 01003 USA
[6] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Met Mat, Guangzhou 510640, Peoples R China
来源：
MATERIALS RESEARCH LETTERS | 2024年 / 12卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Eutectic high-entropy alloy; powder metallurgy; heterogeneous structure; strength-ductility trade-off; mechanical property; LOCAL BOUNDARY MIGRATION; ENHANCED STRENGTH; RECRYSTALLIZATION; MICROSTRUCTURE; DEFORMATION; MECHANISMS; PLASTICITY; EXTRUSION; BEHAVIOR;
D O I：
10.1080/21663831.2024.2332608
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We used powder hot extrusion followed by annealing to fabricate a dual-phase AlCoCrFeNi2.1 eutectic high-entropy alloy consisting of both non-recrystallized and recrystallized grains with dense nano-sized precipitates arranged in heterogeneous structures. The resulting alloy exhibits superior tensile properties with a yield strength of similar to 1.2 GPa, an ultimate tensile strength of similar to 1.5 GPa, and a uniform elongation of similar to 18%. Such multiscale microstructure results in exceptional strain hardening of the AlCoCrFeNi2.1 alloy by activating remarkable hetero-deformation induced (HDI) stresses. Our study provides an effective approach to fabricating high-performance structural materials via dual-phase heterogeneous microstructure design.
引用
收藏
页码：363 / 372
页数：10
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