Phase separation of metastable CoCrFeNi high entropy alloy at intermediate temperatures

• Published in: Scripta materialia Vol. 126; pp. 15 - 19
• Main Authors: He, Feng, Wang, Zhijun, Wu, Qingfeng, Li, Junjie, Wang, Jincheng, Liu, C.T.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2017
• Subjects: Annealing; Decomposition; Entropy; Face centered cubic lattice; Ferrous alloys; High entropy alloys; Lattice parameters; Phase separation; Phase stability; Stability; Superalloys; High entropy alloys; Annealing; Phase separation

CoCrFeNi alloy is an exemplary stable base for high entropy alloys (HEAs), but its phase stability is still suspicious. Here, the CoCrFeNi HEA was firstly identified to be thermally metastable at 750°C. Composition decomposition occurred after annealed at 750°C for 800h. The minor addition of Al acc...