Synthesis and properties of multiprincipal component AlCoCrFeNiSix alloys

被引:197
作者
Zhu, J. M. [1 ,2 ]
Fu, H. M. [1 ]
Zhang, H. F. [1 ]
Wang, A. M. [1 ]
Li, H. [1 ]
Hu, Z. Q. [1 ]
机构
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 27-28期
基金
中国国家自然科学基金;
关键词
High-entropy alloy; Mechanical properties; Microstructure; HIGH-ENTROPY ALLOYS; WEAR-RESISTANCE; MICROSTRUCTURE; CORROSION; CARBON; SYSTEM;
D O I
10.1016/j.msea.2010.07.049
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
By introducing nonmetallic Si element, AlCoCrFeNiSix (x values in molar ratio, x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) alloys are designed and prepared. One kind of nanoscale cellular structure forms due to the introduction of nonmetallic Si element. The alloy is composed mainly of BCC solid solution and possesses excellent room-temperature compressive mechanical properties. The excessive introduction of Si element leads to the precipitation of 8 phase at grain boundary. The improvement of mechanical properties is attributed to the solid solution of Si element and precipitation strengthening of nanoscale cellular structure. The precipitated 8 phase at grain boundary should be responsible for transition of alloy from plastic fracture to brittle fracture. Among them, Si-0.4 alloy exhibits excellent comprehensive mechanical properties, yield stress of 1481 MPa, fracture strength of 2444 MPa and plastic strain of 13.38%, respectively. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:7210 / 7214
页数:5
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