Effect of Laser peenenig process on the fatigue strength of aluminum alloy MIG welded joint

Abstract

In the study, the effect of Laser peenenig process on the fatigue strength, Vickers hardness, and residual stress of aluminum alloy MIG welded joint. The following results were confirmed: (1)fatigue strength of aluminum alloy welded joint were improved by laser peening; (2)surface hardness of aluminum alloy welded joint were improved as high as that of the base metal; (3)compressive residual stress were developed at the weld toe of aluminum alloy welded joint.