EFFECT OF ROUGHNESS ON RESIDUAL STRESSES MEASURED BY X-RAY DIFFRACTION USING CONVENTIONAL psi/Omega GEOMETRIES

abstract

This work investigates the behavior of the residual stress field produced by shot peening process in the samples of AISI 1070 steel as a function of subsequent mechanical polishing of the sample surface. Different depths of the near surface zone were probed by X-ray measurements and respective residual stresses values were confronted with the surface roughness parameter, Ra, varied by mechanical polishing. Three regimes of the sample's thickness variation as a function of surface roughness are identified.

subject category

Engineering; Materials Science

authors

Kuznetsov, A; Franca, C; Maru, M; Silva, R; Hirsch, T; Achete, C

our authors

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