Phase equilibria and microstructure evolution of Al-Mo-Ti ternary alloys

Rikiya Nino, Juri Fujinaka, Hiroyuki Shimamura, Seiji Miura, Tetsuo Mohri

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Phase equilibria in Ti-lean part of the Al-Mo-Ti ternary system is investigated to understand the microstructure evolution of near-equi-atomic MoAl alloys containing Ti up to 17 at.%. A partial reaction scheme is proposed based on experimental study. A high temperature ternary A2(bcc)-β phase with Ti concentrations ranging from 13 to 17 at.% decomposes into A15 Mo3Al-D022 Al3Ti two-phase lamellar structure in a manner similar with a eutectoid reaction through a continuous cooling. The decomposition kinetics of the high temperature A2 phase is suppressed by adding Ti. Fine equi-axed two-phase structure is also obtained by an isothermal aging of a retained high temperature A2 phase.

Original languageEnglish
Pages (from-to)611-623
Number of pages13
JournalIntermetallics
Volume11
Issue number6
DOIs
Publication statusPublished - 2003 Jun 1

Keywords

  • A. Aluminides, miscellaneous
  • B. Phase diagram
  • D. Microstructure

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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