Optimizing Mechanical Properties of AlCoCrFeNiTix High-Entropy Alloys by Tailoring Microstructures

被引：62
|
作者：
Wang, Yinfeng [1 ]
Ma, Shengguo [2 ]
Chen, Xiaohua [2 ]
Shi, Juyan [1 ]
Zhang, Yong [2 ]
Qiao, Junwei [1 ,3 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[3] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2013年 / 26卷 / 03期
基金：
中国国家自然科学基金;
关键词：
High-entropy alloy; Microstructure; Compressive property; Hardness; Heat treatment; COMPRESSIVE PROPERTIES; BEHAVIORS; ELEMENTS; DESIGN;
D O I：
10.1007/s40195-012-0174-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of Ti addtions and the heat treatment on the mechanical properties of AlCoCrFeNiTix (x = 0, 0.2, 0.3, 0.4 and 0.5) high-entropy alloys (HEAs) were studied. The results show that the dendrite phase with a body-centered-cubic (bcc) structure transforms into the interdendrite phase with a new bcc structure. With the increase of the Ti contents and heat-treatment temperature, the average hardness and yield strengths are greatly improved, and the highest hardness and yielding strength are 583 HV and 2.07 GPa, respectively in the investigated HEA system. The as-cast and annealed HEAs exhibit excellent mechanical properties, combining with high yielding strength and plasticity. The solid solution strengthening mechanism of Ti additions is responsible for the strengthening effect of AlCoCrFeNiTix HEAs.
引用
收藏
页码：277 / 284
页数：8
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