Microstructure, oxidation resistance and high-temperature strength of γ′ hardened Pt-base alloys

M. Wenderoth, R. Völkl, S. Vorberg, Y. Yamabe-Mitarai, H. Harada, U. Glatzel

研究成果: Article査読

34 被引用数 (Scopus)

抄録

Starting from the base composition with 12 at.% Al, 6 at.% Cr, 5 at.% Ni and Pt balance, precipitation hardened Pt-Al-Cr-Ni alloys with additions of 2 at.% Mo, Re, Ru and W, respectively, were investigated. After homogenization heat treatment and air cooling, all five-component alloys show a bimodal distribution of γ′ precipitates. Along with a fraction of fine γ′ precipitates embedded in a Pt-rich matrix, some coarse primary γ′ particles are observed. Mo, Re and W additions increase strength above 1000 °C, whereas Ru has no beneficial effect on strength. W increases the γ′ volume fraction most effectively, however, the oxidation resistance is worsened dramatically by W additions. The Re-containing alloy shows the best resistance against γ′ growth and coarsening during long-term ageing.

本文言語English
ページ(範囲)539-549
ページ数11
ジャーナルIntermetallics
15
4
DOI
出版ステータスPublished - 2007 4月
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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