Effect of Cr content on precipitation behavior of (CoCrNi)94Ti3Al3 medium entropy alloys

被引：0

作者：

Bai X. ^{[1
]}

Fang W. ^{[1
,2
]}

lv J. ^{[1
]}

Chang R. ^{[1
]}

Yu H. ^{[1
]}

Yan J. ^{[1
]}

Zhang X. ^{[1
]}

Yin F. ^{[1
,2
]}

机构：

[1] Research Institute for Energy Equipment Materials, School of Materials Science and Engineering, Hebei University of Technology, Tianjin

[2] Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin

来源：

Intermetallics | 2021年 / 132卷

基金：

中国国家自然科学基金;

关键词：

Chromium addition; Coarsening kinetics; Hardness response; High entropy alloys; Medium entropy alloys; Precipitation behavior;

D O I：

10.1016/j.intermet.2021.107125

中图分类号：

学科分类号：

摘要：

The L12 nanoparticles-enhanced alloys have huge potential in high temperature applications. In this study, the effects of Cr content on precipitation behaviors of (CoCrNi)94Ti3Al3 medium entropy alloys are investigated. The results indicate the fraction of L12 phase increases with the rising Cr content, meanwhile, the size and coarsening rate of L12 phase decrease, which suppresses the overaged degradation of hardness. The Cr concentration gradient between L12 phase and FCC phase plays an important role in the coarsening process. It is instructive to obtain exceptional nanostructure stability of L12 phase in precipitation-strengthened high entropy alloys via compositional optimization of base elements. © 2021 Elsevier Ltd

引用

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