Modeling the precipitation processes and the formation of hierarchical microstructures in a single crystal high entropy superalloy

Stéphane Gorsse, Yung Ta Chen, Wei Che Hsu, Hideyuki Murakami, An Chou Yeh

Research output: Contribution to journalArticlepeer-review

Abstract

Although superior high temperature tensile yield strength of high entropy superalloys (HESAs) arises from their hierarchical microstructure, the precipitation processes driving its formation remains unclear. In the present study, we analyze the kinetics of γ’ and γ precipitations by treating the concurrent nucleation, growth and coarsening using common computational thermodynamic and kinetic tools to simulate the microstructure genesis and evolution in HESA during thermal treatments. The ability of the simulations to reproduce the experimentally observed microstructure parameters is evaluated. Temperature-time-transformation (TTT) diagrams are calculated to serve as guidelines for further optimization of the hierarchical microstructure of HESAs.

Original languageEnglish
Pages (from-to)147-152
Number of pages6
JournalScripta Materialia
Volume193
DOIs
Publication statusPublished - 2021 Mar 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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