Role of Shot Peening on Life Extension of 12% Cr Turbine, Blading Martensitic Steel Subjected to SCC and Corrosion Fatigue

Author:  G V Prabhugaunkar, M S Rawat, C R Prassad
Source:  Conf Proc: ICSP-7 (pg 177-183)
Doc ID:  1999028
Year of Publication:  1999
Abstract:  
Shot peening is known to enhance the fatigue strength of the materials. A systematic study of the role of shot peening on surface residual stresses and its effect on SCC and corrosion fatigue has been investigated in 3.5% NaCl solution. Controlled shot peening depth in relation to pit size is found to enhance resistance to SCC as well as corrosion fatigue. The role of surface stresses and mechanism controlling crack initiation and propagation are discussed.