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    Volume 48, Issue 2 (March 2020)

    Influence of Surface Finish on Small Punch Testing of 9Cr Eurofer-97 Steel

    (Received 31 August 2018; accepted 20 December 2018)

    Published Online: 2020

    CODEN: JTEVAB

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    Abstract

    This study investigated the effect of surface finish on the deformation behavior of Eurofer-97 steel during room-temperature small punch testing. The surface finish of specimens was varied from coarse to fine (ranging from P240-grit silicon carbide paper to a polished finish using 0.06-μm colloidal silica). Testing was conducted on 8-mm diameter by 0.5-mm-thick disks using a 1-mm-radius punch head. No significant change was observed in the elastic-plastic transition load, maximum load, displacement at maximum load, or displacement at failure. Similarly, in all cases, failure occurred in a ductile manner, yielding a dimpled fracture surface. Although friction and surface defects may influence the output of small punch tests, the effect of altering the specimen surface finish alone was negligible in this case, indicating this is not a dominant factor in small punch testing.

    Author Information:

    Richardson, M. D.
    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon,

    Connolly, S.
    Department of Materials, University of Oxford, Oxford,

    Gorley, M.
    Department of Materials, University of Oxford, Oxford,

    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon,

    Wynne, B. P.
    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon,

    Department of Materials Science & Engineering, University of Sheffield,

    Surrey, E.
    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon,


    Stock #: JTE20180619

    ISSN:0090-3973

    DOI: 10.1520/JTE20180619

    Author
    Title Influence of Surface Finish on Small Punch Testing of 9Cr Eurofer-97 Steel
    Symposium ,
    Committee E10