Post-treatment of arc-welded aluminum alloy joints by laser shock peening

摘要

The possibility to improve aluminum alloy welded joints with laser shock penning was demonstrated. It was shown that microhardness of peened area in heat affected zone is higher than one without post-treatment. Also in this area the residual tensile stresses turns into residual compressive stresses. Laser peening process is proposed to carry out using low-energy lasers. In this case were analysed different types of ablative overlays.