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Phase transformation and microstructural evolution in Ti-44Al-4Nb-4Zr alloy during heat treatment

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Abstract

Phase transformation and microstructural evolution have been studied in Ti-44Al-4Nb-4Zr-0.2Si-0.1B alloys that were cooled from theα +β phase region with various cooling rates. It has been shown that the cooling rates have different influence on the morphology of the transformation products for the three phase transformations studied,α →α 2, B2 →ω, andα →γ. Under slow cooling, all three transformations can be fulfilled. Under rapid cooling, B2 →ω is partially detained and a diffuseω phase forms as metastable phase, butα →γ is almost completely suppressed, which supports that theγ lamellae formation is diffusion controlled.

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Author notes

  1. C. Lin (Graduate Assistant)

    Present address: Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, USA

Authors and Affiliations

  1. Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, 06269-3136, Storrs, CT

    H. W. Yang (Graduate Assistant)

  2. Materials Engineering Program, Department of Mechanical Engineering, Auburn University, 36849, AL

    C. Lin (Graduate Assistant)

Authors
  1. H. W. Yang
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  2. C. Lin
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Yang, H.W., Lin, C. Phase transformation and microstructural evolution in Ti-44Al-4Nb-4Zr alloy during heat treatment. Metall Mater Trans A 37, 3191–3196 (2006). https://doi.org/10.1007/BF02586153

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  • DOI: https://doi.org/10.1007/BF02586153

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