Effect of Re and Ru on the phase stability and coarsening kinetics of L12 phase in a Ni29Co27Fe27Cr3Al7Ti7 high entropy alloy

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

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Author(s)

  • Kaiwei Zhang
  • Feng He
  • Zhongsheng Yang
  • Dingcong Cui
  • Junjie Li
  • Zenan Yang
  • Jincheng Wang

Detail(s)

Original languageEnglish
Article number158904
Journal / PublicationJournal of Alloys and Compounds
Volume866
Online published2 Feb 2021
Publication statusPublished - 15 Jun 2021

Abstract

The thermal stability of precipitates is a major concern for L12-type strengthening high entropy alloy at elevated temperatures. In this study, we systematically investigated the effect of Re and Ru on the phase stability an d coarsening kinetics of L12 precipitates in the Ni29Co27Fe27Cr3Al7Ti7 HEA. The L12 phase exhibited a high volume fraction of 40.29% in the explored HEA and remained a stable morphology during the long-term exposure. Re addition did not change the volume fraction of L12 phase, while Ru addition decreased it to 34.42%. Both Re and Ru facilitated the formation of L21 precipitates slightly. Minor Re significantly decreased the coarsening rate of L12 phase and minor Ru also retarded the coarsening of L12 phase to some degree, which were mainly ascribed to the sluggish diffusion of Re and Ru atoms. These findings provide a feasible strategy to improve the coarsening resistance of L12 precipitates in HEA system through sluggish atomic diffusion.

Research Area(s)

  • Coarsening kinetics, High entropy alloy, Phase stability

Citation Format(s)

Effect of Re and Ru on the phase stability and coarsening kinetics of L12 phase in a Ni29Co27Fe27Cr3Al7Ti7 high entropy alloy. / Zhang, Kaiwei; He, Feng; Yang, Zhongsheng; Cui, Dingcong; Li, Junjie; Yang, Zenan; Wang, Jincheng; Wang, Zhijun.

In: Journal of Alloys and Compounds, Vol. 866, 158904, 15.06.2021.

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