Effect of the interaction layer on the mechanical properties of Ti–6Al–4V alloy castings

G. Q. Wu, X. Cheng, Wei Sha, X. J. Cheng, J. Q. Zhao, H. Nan

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    3 Citations (Scopus)
    240 Downloads (Pure)

    Abstract

    The interaction between the face coat material of a mould and the titanium alloy will cause oxygen penetration during the casting and solidification process, resulting in the formation of an α-case interaction layer at the metal surface that influences the mechanical properties of the cast components. In this study, the influence of α-case thickness and loading positions in a Ti–6Al–4V (Ti64) alloy on metal hardness, impact properties and bending strength was investigated. The results showed that the metal surface α-case consisted of many coarse α laths which has a higher hardness than metal matrix. The mechanical properties of the alloy are influenced by the α-case. The alloy bending strength was observed to have changed linearly with the thickness of sample.
    Original languageEnglish
    Pages (from-to)125-130
    Number of pages6
    JournalMaterials Chemistry and Physics
    Volume175
    Early online date09 Mar 2016
    DOIs
    Publication statusPublished - 01 Jun 2016

    Keywords

    • Hardness
    • Optical microscopy
    • Mechanical testing
    • Solidification

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