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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
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Author(s)

  • Feng He
  • Jing Wang
  • Qingfeng Wu
  • Bin Han
  • Junjie Li
  • Jincheng Wang

Detail(s)

Original languageEnglish
Pages (from-to)281-285
Journal / PublicationScripta Materialia
Volume146
Online published16 Dec 2017
Publication statusPublished - 15 Mar 2018

Abstract

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.

Research Area(s)

  • High entropy alloys, Phase transformation, Precipitation

Citation Format(s)

Abnormal γ″ - ε phase transformation in the CoCrFeNiNb0.25 high entropy alloy. / He, Feng; Wang, Zhijun; Wang, Jing; Wu, Qingfeng; Chen, Da; Han, Bin; Li, Junjie; Wang, Jincheng; Kai, J. J.

In: Scripta Materialia, Vol. 146, 15.03.2018, p. 281-285.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review