Influence of the deformation intensity of different mechanical surface treatments on the fatigue strength

Author:  T. Nitschke-Pagel, K. Dilger and H. Eslami-Chalandar
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.173-178)
Doc ID:  2014071
Year of Publication:  2014
Abstract:  
The residual stress condition of post weld treated of welded high strength aluminium alloys is of great interest because it is related often to the fatigue behaviour. Systematic investigations on welded AIMgSi1Mn-joints show the influence of different peening procedures on the near surface residual stresses as those in deeper layers. However under service conditions the initial residual stresses are changed due to plastic deformations. The investigations shall give an answer to the question of the correlation between residual stress relaxation and the consequences for the fatigue performance of such welds.