Shot Peenig to Prevent Intergranular Corrosion of Ferritic Stainless Steel

Author:  E. Lamaire, y. LeGuernic, F. Roch, C. Scott
Source:  Conf Proc: ICSP-6, (p. 61-72)
Doc ID:  1996052
Year of Publication:  1996
Abstract:  
Shot peening is usually considered as a sensible method to prevent cracking related to stress fatigue or stress corosion. The prevention of intergranular corrosion (IGC) is not, up to now, a typical application of the process. The reason why is probably that IGC has no connection with mechanics. However, some authors have noted a beneficial effect for austenitic steels when shot peening is performed before sensitization (i.e. depletion of Cr by precipitation at the grain boundry). We provide in this paper a new insight by illustrating the effect of shot peening on a ferritic stainless steel when the treatment is applied after sensitization.