Effect of ball milling on microstructure and mechanical properties of 6061Al matrix composites reinforced with high-entropy alloy particles

被引：72
作者：
Chen, Weiping [1 ]
Li, Zixuan [1 ]
Lu, Tiwen [1 ,2 ]
He, Tianbing [2 ]
Li, Ruikai [1 ]
Li, Bing [1 ]
Wan, Bingbing [1 ]
Fu, Zhiqiang [1 ]
Scudino, Sergio [2 ]
机构：
[1] South China Univ Technol, Guangdong Key Lab Adv Metall Mat Proc, Guangzhou 510640, Guangdong, Peoples R China
[2] IFW Dresden, Inst Complex Mat, Helmholtzstr 20, D-01069 Dresden, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 762卷
关键词：
Metal matrix composites; High-entropy alloy reinforcement; Milling time; Heterogeneous structure; Mechanical properties; AL COMPOSITES; THERMAL-STABILITY; HYBRID COMPOSITES; AGING BEHAVIOR; HIGH-STRENGTH; CR PARTICLES; DUCTILITY; DESIGN; ORIENTATION; FABRICATION;
D O I：
10.1016/j.msea.2019.138116
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
6061Al matrix composites reinforced by 7.5 vol.% nanocrystalline CoNiFeAl0.4Ti0.6Cr0.5 high-entropy alloy (HEA) particles have been synthesized by powder processing of powder mixture ball milled for 10 h, 20 h and 40 h. Results indicated that the average ultimate tensile strength and fracture strain of the 6061Al-HEA-10 h composite were 378 MPa and 8.4%, better than those of the 6061Al-HEA-20 h composite, which was related to the homogeneous distribution of HEA particles. Specifically, the 6061Al-HEA-40 h composite had the highest ultimate strength and yield strength, and the fracture strain was close to the 6061Al-HEA-20 h composite, related with the formation of fine HEA particle clusters and a heterogeneous grain structure. The strengthening mechanisms for the improved strength of the composites are mainly derived from the Hall-Petch effect and geometrically necessary dislocations.
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页数：12
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