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Shot peening is commonly used to retard initiation and growth of fatigue cracks in fracture critical components. During service, the shot-peened residual stresses may change due to thermal-mechanical loading. This paper describes an approach for characterizing and modeling residual stress relaxation in supersolvus IN100 at 650 °C. The model incorporates the dominant creep deformation mechanism, coupling...
Creep tests on shot-peened nickel-base superalloy specimens, subject to applied stresses near and above monotonic yield, have been performed to characterize residual stress relaxation under sustained loading at 650°C in IN100. Retained residual stress–depth profiles, measured on crept samples, show that yielding during initial loading produces the largest change in the residual stress profile. Furthermore,...
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