期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 9, 期 5, 页码 11231-11243出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2020.07.056
关键词
High-entropy alloys; Alloy design; Phase transformation; Intermetallics; Microstructure; Multiphase
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2218-E-005-003]
- High Entropy Materials Center from The Featured Areas Research Center Program by the Ministry of Education (MOE)
- Ministry of Science and Technology (MOST) in Taiwan [MOST 109-2634-F-007-024]
Despite the large amount of literature on high entropy alloys (HEAs) in recent years, reports on the equilibrium/near-equilibrium phase and microstructure of HEAs are still very limited. Here, we investigate the phase constituents of four CoCrFeNiX (X = Y, Ti, Zr, Hf) HEAs after prolonged annealing. It is found that the alloys typically contain two major phases - a dominating intermetallic (IM) phase and a BCC phase. The major phases in general remain unchanged regardless of annealing temperature. Annealing at lower temperatures, however, typically leads to the formation of new minor phases. In particular, the formation of sigma phase during annealing is observed in all the alloys. Existing phase formation theories are applied to the alloys. The theories successfully predict that the present alloys do not form simple solid solution phases only. Phase-specific stability criteria also explain the prevalence of Laves and sigma phases quite well. (C) 2020 The Authors. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据