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    Volume 7, Issue 4 (May 2018)

    Special Issue Paper

    Cold Compression of 7075 and Factors Influencing Stress Relief

    (Received 11 August 2017; accepted 9 October 2017)

    Published Online: 08 May 2018

    CODEN: MPCACD

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    Abstract

    The residual stresses in heat-treated 7075 aluminum alloy blocks have been characterized using neutron diffraction, X-ray diffraction, and incremental center-hole drilling. Specimens were quenched to induce high-magnitude residual stresses, which were then stress relieved by the controlled application of plastic deformation using a cold compression technique. The experimental variables investigated were the quench water temperature and the postquench delay. This delay is considered to influence the final residual stress magnitudes because of hardening precipitation occurring by natural aging during the period between quenching and the application of plastic deformation. Cold compression significantly lowered the residual stresses in all specimens. Neutron diffraction measurements demonstrated a benefit to applying plastic deformation as soon as possible after quenching. However, this beneficial effect was not evident when characterizing surface residual stresses using hole drilling or X-ray diffraction.

    Author Information:

    Robinson, J. S.
    School of Engineering, University of Limerick,

    Wimpory, R. C.
    Helmholtz Zentrum Berlin für Materialien und Energie, Berlin,

    Tanner, D. A.
    School of Engineering, University of Limerick,

    Mooney, B.
    School of Engineering, University of Limerick,

    Truman, C. E.
    Department of Mechanical Engineering, University of Bristol,

    Panzner, T.
    Materials Science and Simulations, Paul Scherrer Institute, Villigen,


    Stock #: MPC20170130

    ISSN:2379-1365

    DOI: 10.1520/MPC20170130

    Author
    Title Cold Compression of 7075 and Factors Influencing Stress Relief
    Symposium ,
    Committee B07