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<p>(Nb,W) co-alloyed TiAl alloys have excellent creep/rupture properties at high temperature. (Nb,Fe) co-alloyed TiAl alloys have excellent hot workability at high temperature. The B2 phase can improve the plasticity of the alloy at high temperature. At low temperature, the mechanism of action of B2 phase on the alloy and the hot workability of the alloy still need to be studied. In this paper, the hot processing performance of three alloys (Ti-44Al-8Nb-0.1B (8Nb), Ti-44Al-4Nb-1W-0.1B (4Nb1W) and Ti-44Al-6Nb-2Fe-0.1B (6Nb2Fe) was evaluated by engineering hot compression experiments at lower temperatures (750–850&#xa0;°C) and different compression rates (0.001–0.0001&#xa0;s<sup>−1</sup>). The experimental data indicate that 6Nb2Fe has excellent hot workability at 800–850&#xa0;°C. The B2 phase can still improve the plasticity of the alloy at low temperature. The γ phase, DRX and γ/γ<sub>T</sub> play an auxiliary role in the hot workability of the alloy.</p>

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Low-temperature hot compression behavior of Nb-, W-, and Fe-containing TiAl alloys at 750–850 °C

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Mingxu Zhang,
  • Shulin Dong,
  • Yingdong Qu,
  • Guanglong Li,
  • Wei Zhang,
  • Siruo Zhang,
  • Shibing Liu

摘要

(Nb,W) co-alloyed TiAl alloys have excellent creep/rupture properties at high temperature. (Nb,Fe) co-alloyed TiAl alloys have excellent hot workability at high temperature. The B2 phase can improve the plasticity of the alloy at high temperature. At low temperature, the mechanism of action of B2 phase on the alloy and the hot workability of the alloy still need to be studied. In this paper, the hot processing performance of three alloys (Ti-44Al-8Nb-0.1B (8Nb), Ti-44Al-4Nb-1W-0.1B (4Nb1W) and Ti-44Al-6Nb-2Fe-0.1B (6Nb2Fe) was evaluated by engineering hot compression experiments at lower temperatures (750–850 °C) and different compression rates (0.001–0.0001 s−1). The experimental data indicate that 6Nb2Fe has excellent hot workability at 800–850 °C. The B2 phase can still improve the plasticity of the alloy at low temperature. The γ phase, DRX and γ/γT play an auxiliary role in the hot workability of the alloy.