Fatigue improvement of aluminium welds by means of deep rolling and diamond burnishing

Abstract Deep rolling is an industrially widely established mechanical surface treatment process for the modification of roughness and fatigue resistance. However, has not been considered as a potential method post welded joints yet. Even, deep increasing strength comparably well-known in case non-welded components. Therefore, effect (hydrostatic mounted tool) diamond burnishing (mechanical to increase butt was approved this work aluminium alloy AlMg4,5Mn0,7 (EN AW 5083). For purpose, tests under full tensile loading were performed as-welded rolled, burnished ultrasonic impact treated conditions. Different residual stress states well hardening are determined rolled condition. similar significant life improvement both processes.