Microstructural evolution and mechanical properties of Al3Ti-based multi-phase alloys

Seiji Miura, Juri Fujinaka, Rikiya Nino, Tetsuo Mohri

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

A preliminary study on the phase relations in Al-Mo-Ti-X quaternary systems in the vicinity of Ti-trialuminide phases is carried out with various additives X= Mn, Cr, Fe, Ni and Ag. In the Al-Mo-Ti ternary system, a bcc-phase field extends from the Ti-Mo edge to high Al region at high temperatures and it equilibrates with a D022-Al3Ti phase containing a large amount of Mo. It is found that, by additions of X= Mn, Cr, Fe or Ni, an Ll2-(Al, X)3Ti phase appears near the two-phase region composed of the D022-Al3Ti and bcc phases in the Al-Mo-Ti ternary system. By heat treatment at 1223 K, the bcc phase of quaternary alloys decomposes into the A15-Mo3Al, D022, Ll2 and/or σ phases, and no voids are observed. The mechanical properties of these alloys are also investigated by Vickers hardness.

Original languageEnglish
Pages (from-to)N5151-N5156
JournalMaterials Research Society Symposium - Proceedings
Volume646
Publication statusPublished - 2001 Dec 1
EventHigh Temperature Ordered Intermetallic Alloys IX - Boston, MA, United States
Duration: 2000 Nov 272000 Nov 29

ASJC Scopus subject areas

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

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