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The age hardening effect in Ti-6 Al-4 V due to ω and α precipitation in the β grains

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Abstract

The structure at room temperature of a quenched TA6V titanium alloy has been investigated. This structure isα +α′ orα +β according to the treatment temperature; it is always metastable. During ageing theβ grains decomposed by the reactionβ →β +ω +α →β +α; this decomposition was accompanied by a large increase of the 0.2% yield stress. No structural modification was observed inα. Theα andβ phase of TA6V were separately investigated in the form of single-phase alloys. The hardness ofα was insensitive to ageing, whileβ was considerably hardened byω andα; we deduced that the strengthening of the minor phaseβ during ageing is mainly responsible for the hardening of TA6V.

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Authors and Affiliations

  1. Office National d'Etudes et de Recherches Aérospatiales (ONERA), 92320, Châtillon, France

    Alain Lasalmonie & Marc Loubradou

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  1. Alain Lasalmonie
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  2. Marc Loubradou
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Lasalmonie, A., Loubradou, M. The age hardening effect in Ti-6 Al-4 V due to ω and α precipitation in the β grains. J Mater Sci 14, 2589–2595 (1979). https://doi.org/10.1007/BF00610627

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  • DOI: https://doi.org/10.1007/BF00610627

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