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Microstructural control of Ti-Al-Mo-Nb alloy system with respect to variation of B

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Abstract

In the current study, phase stability of Ti-Al-Mo-Nb alloys was investigated, and the effect of B addition was examined for cast alloys. The fabricated cast alloys were mainly composed of α2 / γ lamellar with a β phase, when they were heat treated at 1100 °C followed by air cooling, the alloy was composed of α2 / γ lamellar with γ+β necklace phase at the colony boundary for the Ti-45Al-3Mo-2Nb-1B alloy, and the colony size was refined to ~ 20 μm. In order to identify the effect of the microstructures on mechanical strength, compressive tests were performed on the fabricated alloys of Ti-45Al-3Mo-2Nb and Ti-45Al-3Mo-2Nb-1B at room temperature and at 800 °C. The microstructural variations and phase stability were discussed in terms of pseudo-binary phase diagram calculated by Pandat software™.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Hanbat National University, Daejeon, 34156, Republic of Korea

    Minseok Kim, Kwangsoo Choi & Joon Sik Park

  2. CompuTerm LCC, Greenway bluoevard, Middleton, WI, 53719, USA

    Jun Zhu & Fan Zhang

  3. Agency for Defense Development, Daejeon, 34060, Republic of Korea

    Youngbuem Song

  4. Gamteck LLC, Beavercreek, 45431, USA

    Youngwon Kim

  5. Department of Materials Science and Metallurgical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea

    Seonghoon Yi

Authors
  1. Minseok Kim
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  2. Kwangsoo Choi
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  3. Jun Zhu
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  4. Fan Zhang
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  5. Youngbuem Song
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  6. Youngwon Kim
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  7. Seonghoon Yi
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  8. Joon Sik Park
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Corresponding authors

Correspondence to Seonghoon Yi or Joon Sik Park.

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Kim, M., Choi, K., Zhu, J. et al. Microstructural control of Ti-Al-Mo-Nb alloy system with respect to variation of B. Met. Mater. Int. 23, 625–631 (2017). https://doi.org/10.1007/s12540-017-6667-z

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  • DOI: https://doi.org/10.1007/s12540-017-6667-z

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