Microstructure and wear behavior of AlxCo1.5CrFeNi1.5Tiy high-entropy alloys

被引：1237
|
作者：
Chuang, Ming-Hao [1 ]
Tsai, Ming-Hung [2 ]
Wang, Woei-Ren [3 ]
Lin, Su-Jien [1 ]
Yeh, Jien-Wei [1 ]
机构：
[1] Natl TsingHua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
[2] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
[3] Ind Technol Res Inst, Tainan 709, Taiwan
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 16期
关键词：
High-entropy alloys; Wear mechanism; Microstructure; Hardness; Oxidation; NI-BASE SUPERALLOYS; COMPRESSIVE PROPERTIES; PHASE PRECIPITATION; DELAMINATION THEORY; OXIDATIONAL WEAR; ETA-PHASE; RESISTANCE; MECHANISM; CO; SIMULATION;
D O I：
10.1016/j.actamat.2011.06.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A series of AL(x)Co(1.5)CrFeNi(1.5)Ti(y) high-entropy alloys with different Al and Ti contents were designed, and their phase and microstructure were investigated. The adhesive wear behavior and mechanism were also studied and compared with the conventional wear-resistant steels SUJ2 and SKH51. The amounts of Al and Ti strongly affect the phase and microstructure, particularly the amount and morphology of the hard eta-(Ni, Co)(3)Ti phase. It was found that the wear resistance of the Co1.5CrFeNi1.5Ti and Al0.2Co1.5CrFeNi1.5Ti alloys is at least two times better than that of conventional wear-resistant steels with similar hardness. The excellent anti-oxidation property and resistance to thermal softening in these high-entropy alloys are proposed to be the main reasons for the outstanding wear resistance. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：6308 / 6317
页数：10
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