Microstructure and mechanical properties of as-built and heat-treated electron beam melted Ti–6Al–4V

Abdul Syed, Mustafa Awd, Frank Walther, Xiang Zhang

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    24 Citations (Scopus)
    55 Downloads (Pure)

    Abstract

    This paper investigates the effect of post-deposition heat treatment on porosity, microstructure, and mechanical properties of Ti–6Al–4V produced via an Electron Beam Melting process. Samples were studied in the conditions of as-built and heat treated at 920°C and 1030°C. The as-built samples were characterised by columnar β grains consists of α+β microstructure with Widmanstätten and colony morphologies were found. Heat treatment resulted in increased α lath width. The yield strength and ultimate tensile strength was greater in the as-built condition than wrought material. Porosity re-growth occurred after heat treatment but it did not affect the tensile properties. Greater ductility after heat treatment was attributed to the larger α lath width which increases effective slip length.
    Original languageEnglish
    Pages (from-to)653-660
    Number of pages8
    JournalMaterials Science and Technology
    Volume35
    Issue number6
    Early online date19 Feb 2019
    DOIs
    Publication statusPublished - 13 Apr 2019

    Bibliographical note

    This is an Accepted Manuscript of an article published by Taylor & Francis in Materials Science and Technology on 19/02/2019, available online: http://www.tandfonline.com/10.1080/02670836.2019.1580434

    Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

    Keywords

    • Additive manufacturing
    • electron beam melting
    • heat treatment
    • microstructure
    • tensile properties
    • titanium alloys

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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