Author(s)

U. Noster, I. Altenberger & B. Scholtes

Abstract

Combined mechanical and thermal surface treatment of magnesium wrought alloy AZ31 U. Noster, I. Altenberger & B. Scholtes Institute of Materials Technology, University Gh Kassel, Germany Abstract Modern magnesium wrought alloys are very attractive for light-weight constructions due to their relatively high strength-to-density ratio and their good corrosion resistance. In addition, mechanical surface treatments, like shot peening or deep rolling, lead to considerable enhancements of fatigue strength. In this paper, the influence of deep rolling combined with heat treatment on room temperature fatigue behavior of wrought magnesium alloy AZ31 is studied. Annealing of AZ31 after plastic deformation can lead to an increase of hardness. Here, the influence of annealing after deep rolling, which also plastically deforms near-surface regions, on fatigue lifetime compared to polished and as deep rolled specimens is investigated. The material and residual stress state of

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