Effects of alloying additions on the thermal stability of the lamellar structure of γ-TiAl-based cast alloys

G. W. Qin, L. Wulff, K. Oikawa, T. Ikeshoji, S. Sumi, G. Zhao, M. Jiang, D. W. Mao, J. L. Ma, S. M. Hao

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The stability of the as-cast lamellar structure in the Ti-48Al, Ti-45Al-3Ga, Ti-45Al-2Nb-2Cr, Ti-46Al and Ti-46Al-1.0-Si alloys at 1150 and 1000 °C was studied. The coarsening was very marked in the case of the first three alloys at 1150 °C and the alloying additions of 3Ga and 2Nb+2Cr to the Ti-45Al alloy did not improve the thermal stability of primary lamellae, but impeded the growth of the coarsened grains. The 2Nb+2Cr additions to the Ti-45Al alloy were favorable to the thermal stability of primary lamellae at 1000 °C. The effect of the 1.0Si addition was even more excellent for the as-cast lamellar structure stability at high temperatures.

Original languageEnglish
Pages (from-to)173-177
Number of pages5
JournalIntermetallics
Volume9
Issue number2
DOIs
Publication statusPublished - 2001 Feb

ASJC Scopus subject areas

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

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