EFFECT OF LASER SURFACE TREATMENT ON HIGH CYCLE FATIGUE OF AISI 316L STAINLESS STEEL |
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Authors: | H. Stamm U. Holzwarth D. J. Boerman F. Dos Santos Marques A. Olchini R. Zausch |
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Affiliation: | European Commission, Joint Research Centre, Institute for Advanced Materials TP 750, I-21020 Ispra (Varese), Italy |
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Abstract: | Abstract— The effect of a laser surface treatment on the high-cycle fatigue behaviour of the austenitic stainless steel AISI 316L was investigated. The specimens were subjected to a surface melting using a CO2-laser. Although this treatment introduced tensile residual stresses in the melted and resolidified surface layer and intensified the surface roughness, the fatigue limit could be increased by 20% with respect to the as-received specimens. It is suggested that grain refinement in the rapidly resolidified surface layer is mainly responsible for this improvement. |
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Keywords: | 316 stainless steel Laser surface treatment Fatigue limits |
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