Effects of Shot peening and Ball-burnishing on the Fatigue Performance of Al 6082

Author:  M. Abdulstaar, M. Mhaede, M. Wollmann, L. Wagner
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.142-146)
Doc ID:  2014065
Year of Publication:  2014
Abstract:  
In this study, the effects of shot peening (SP) and ball-burnishing (BB) on the fatigue performance of the aluminum alloy Al 6082 in naturally aged {T 4) and artificially aged conditions (T6) were investigated. SP was conducted using spherically conditioned cut wire (SCCW14) with an Almen intensity of 0.20 mmA. BB was performed using a hard metal ball (HG6) and a burnishing pressure of 100 bar. Surface property (roughness) and near-surface properties (microhardness and residual stresses) were evaluated. SP and BB markedly enhanced the fatigue performance of the electropolished reference condition. The fatigue enhancement due to mechanical surface treating in T4 is more pronounced than in T6. This is explained by the differences in work-hardening capability of the two temper conditions.