Browse/search for people

Publication - Dr Matthew Peel

    Localised prior strain-hardening increases the tearing resistance of ductile steel

    Citation

    Coules, H, Horne, G, Peel, M & Connolley, T, 2019, ‘Localised prior strain-hardening increases the tearing resistance of ductile steel’. International Journal of Mechanical Sciences, vol 150., pp. 103-111

    Abstract

    In structural materials, ‘intrinsic’ toughening originates from plastic dissipation of strain energy at the tips of cracks. This depends on a material's microstructure and its stress–strain response. By introducing a spatially-varying distribution of prior strain-hardening into a material, we can modify the stress field which develops around a crack as it is loaded, producing an increased resistance to ductile tearing. We demonstrate this toughening effect using synchrotron X-ray diffraction and digital image correlation measurements of the crack tip region in a ductile ferritic steel. Localised strain-hardening also introduces a residual stress, but this is shown not to contribute significantly to the initiation of tearing in this material.

    Full details in the University publications repository