Estimation of laser shock peening induced plastic deformation in Hastelloy-X superalloys

Subhasisa Nath, Pratik Shukla, Xiaojun Shen, Jonathan Lawrence, Ajit Behera

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    The goals of the present study are to strengthen a new, Hastelloy-X superalloys by prestressing the surface with laser-plasma driven shock waves and also to quantify the effect of Laser Shock Peening (LSP) on the evolution of phase, residual stress (both through thickness and on the surface), dislocation density, and hardness of Hastelloy-X superalloys. Dislocation densities in the peened and unpeened samples were measured by Wiliamson and Smallman approach to analyze the severity of plastic deformation following LSP surface treatment. The maximum compressive residual stress measured on the peened surface of Hastelloy-X samples using incremental hole drilling technique was 850 MPa. In addition, it was found that the LSP parameters have a dominant effect in tailoring the surface hardening behavior and residual stress in Hastelloy-X superalloys.
    Original languageEnglish
    Pages (from-to)233-257
    Number of pages25
    JournalInternational Journal of Peening Science & Technology
    Publication statusPublished - 1 Sept 2019

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    • Laser shock peening
    • residual stress
    • ncremental hole drilling
    • dislocation density
    • strain hardening


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