Effect of advancing direction on fatigue life of 316L stainless steel specimens treated by double-sided laser shock peening
作者： J.A. Porro , J.L. Ocaña , C. Correa , L. Ruiz de Lara , M. Díaz
DOI: 10.1016/J.IJFATIGUE.2015.04.018
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摘要: Abstract Laser shock peening (LSP) is considered as a well-established technology for inducing compressive residual stresses under the surface of metallic components. As result, fatigue life increased and material becomes more resistant to corrosion wear. This paper studies effect significant parameter LSP, advancing direction laser scanning pattern, on induced stress fields stainless steel 316L samples using experiments 3D finite element analysis. The chosen interest nuclear biomedical applications. Two different processing strategies (two pulse sequences varying direction) were performed specimens. Their lives compared revealing decisive role played by treatment generated stresses. Fatigue in peened specimens was from +166% +471% optimizing sequence. improvement explained stress–strain
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