Abnormal γ″ - ε phase transformation in the CoCrFeNiNb0.25 high entropy alloy

Feng He, Zhijun Wang, Jing Wang, Qingfeng Wu, Da Chen, Bin Han, Junjie Li, Jincheng Wang, J. J. Kai

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50 引用 (Scopus)

摘要

Thermodynamically, the multi-principal-component compositions of high entropy alloys (HEAs) bring diversified phase transformation paths. In this study, we report that a γ″ phase precipitates from the face centered cubic (FCC) matrix and then abnormally transforms into a ε phase, instead of the δ phase as reported in superalloys. The ε phase has a (NiCo)3Nb-type hexagonal crystal structure. The phase transformation takes places in a manner of peritectoid reaction: γ″ + FCC → ε. The present findings indicate a high probability for researchers to find new efficient strengthening phases as well as interesting phase transformation mechanism in HEAs.

源语言英语
页(从-至)281-285
页数5
期刊Scripta Materialia
146
DOI
出版状态已出版 - 15 3月 2018

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