Saturated solid-solution hardening behavior of Ir-Hf-Nb refractory superalloys for ultra-high temperature applications

J. B. Sha, Y. Yamabe-Mitarai

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The principles of multi-component alloying and saturated solid-solution hardening were combined for the design and development of Ir-based alloys for ultra-high temperature applications. It is found that as a solute, the transition metal Hf combined with Nb exerts its full potential for solid-solution hardening on the solvent Ir at room temperature and higher. With a monolithic saturated face-centered cubic structure, the Ir-3Hf-5Nb alloy has a 0.2% yield strength of as high as 140 MPa even at 1950°C.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalScripta Materialia
Volume54
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

Keywords

  • Compression test
  • High-temperature strength
  • Iridium alloys
  • Solid-solution hardening

ASJC Scopus subject areas

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

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