Author(s)

M. Hilpert & L. Wagner

Abstract

The effect of peening medium and Almen intensity on fatigue performance of the high-strength magnesium alloy AZ 80 was studied in air and in aqueous NaCl solutions. When tested in air, the fatigue life given Almen intensity was independent of the peening medium However, the Almen intensity had a very significant effect, causing dramatic improvements in fatigue life at low intensities while hardly any improvement was found at higher intensities. For tests in aqueous NaCl solutions, peening with glass beads was superior to steel shot, presumably due to iron contamination of the magnesium surface and its effect on the resistance to corrosion fatigue crack nucleation. Reducing the process-induced roughness by polish

Keywords