Designing high entropy superalloys for elevated temperature application

Yung Ta Chen, Yao Jen Chang, Hideyuki Murakami, Stéphane Gorsse, An Chou Yeh

Research output: Contribution to journalArticle

Abstract

In the context of cast alloy development for high temperature applications, high entropy superalloys (HESA) have exhibited superior cost specific tensile strength than that of superalloys such as CM247LC. Compositions of HESA are distinctively different from those of cast superalloys with higher contents of Fe and Ti, making HESA cheaper and lighter. Comparing to superalloys, although HESA has adopted the template of FCC-structured (γ) matrix and coherent L12-structured (γ′) precipitates, γ′ is enriched with solutes with higher intrinsic strength, rendering positive lattice misfit, and the high entropy γ matrix may have attributed to a good combination of strength and ductility.

Original languageEnglish
Pages (from-to)177-182
Number of pages6
JournalScripta Materialia
Volume187
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • Cost performance
  • High entropy superalloys
  • High temperature properties
  • Superalloys

ASJC Scopus subject areas

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

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