Influence of heat treatment and thermochemical surface engineering on the hierarchical microstructures of 3d printed austenitic stainless steel

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    Abstract

    This research focuses on characterisation of the hierarchical microstructure of AMmanufactured austenitic stainless steel and the effect of post-processing. The austenitisation treatment is found to dissolve the cellular structure and to reduce hardness, particularly in the layer closest to the support structure. The effect of substrate on low temperature surface hardening (LSTH) is investigated. It is found that the prior annealing and homogenisation of the austenitised specimen change both the depth of expanded austenite formation and the hardness profile.
    Original languageEnglish
    Title of host publicationProceedings of the 10th European Stainless Steel Conference – Science and Market and 6th European Duplex Stainless Steel Conference & Exhibition (ESSC & DUPLEX 2019)
    PublisherAustrian Society for Metallurgy and Materials
    Publication date2019
    Pages22-31
    ISBN (Print)978-1-7138-0301-0
    Publication statusPublished - 2019
    EventESSC & DUPLEX 2019 - Schloss Schönbrunn, Vienna, Austria
    Duration: 30 Sep 20192 Oct 2019

    Conference

    ConferenceESSC & DUPLEX 2019
    LocationSchloss Schönbrunn
    Country/TerritoryAustria
    CityVienna
    Period30/09/201902/10/2019

    Keywords

    • Additive manufacturing
    • Austenitic stainless steel
    • Austenitisation
    • Low temperature surface hardening
    • Microstructure stability

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