Effect of Zr on microstructure and oxidation behavior of α and α + α2 Ti-Al-Nb alloys

Sae Matsunaga, Ai Serizawa, Yoko Yamabe-Mitarai

研究成果: Article

6 引用 (Scopus)

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To develop high-temperature Ti alloys, microstructure and oxidation behavior were investigated in Ti-(10,15)Al-2Nb-(1,2)Zr (at%) alloys. For reference, ternary Ti-15Al-2Zr alloy was also investigated. A single α phase exists in Ti-10Al-2Nb-(1, 2)Zr alloys; on the other hand, an α and α2 two-phase was observed in Ti-15Al-2Nb-(1, 2)Zr alloys. Fine α2 precipitates of about 10 nm were observed in the Ti-15Al alloys. The oxidation behavior of Ti-Al-Nb-Zr and Ti-Al-Zr ternary alloys was investigated to understand the effect of Zr on oxidation behavior at 1023 K. It was found that Zr improves the oxidation resistance of the α phase more effectively than Nb. TiO2 was formed in all tested alloys. The addition of Zr drastically decreased the growth rate of TiO2. It was also found that the addition of Nb improved adhesion of the oxide layer.

元の言語English
ページ(範囲)1902-1907
ページ数6
ジャーナルMaterials Transactions
57
発行部数11
DOI
出版物ステータスPublished - 2016

ASJC Scopus subject areas

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

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