Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy

Fengming Qiang, Hongchao Kou, Guang Yang, Bin Tang, Jinshan Li

科研成果: 期刊稿件文章同行评审

19 引用 (Scopus)

摘要

A multi-step heat treatment is proposed to optimize the lamellar structure of as-cast high Nb containing TiAl alloys. The β-segregation is removed effectively after the first two step heat treatment, a short-time holding within β single phase field then annealing in α+β phase field. During the third step heat treatment, a subsequent low-temperature aging, new γ lamellae precipitate by the means of isolated nucleation or twin-related nucleation. After the proposed multi-step heat treatment, the alloy presents nano-scaled lamellar structure with the colony size about 140 μm.

源语言英语
页(从-至)35-40
页数6
期刊Intermetallics
79
DOI
出版状态已出版 - 1 12月 2016

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