Selection Of Optimum Peening Parameters To Improve Stress Corrosion Cracking Resist.of 18mn 4cr Generator End Ret.ring Steel

Author:  Mukhopadhyay, Prasad, Sharma
Source:  Conf Proc: ICSP-4, (p.543-550)
Doc ID:  1990060
Year of Publication:  1990
Abstract:  
The effect of peening parameters such as shot size, nozzle pressure and peening time on 18Mn4Cr austenitic steel has been studied. Peening led to the formation of compressive residual stress layer on the surface, martensite transformation in some cases and reduced the surface roughness. Based on the results, a set of optimum peening parameters was evolved. Unpeened and peened specimens were tested for their susceptibility to stress corrosion in oxygenated aqueous chloride medium at 70+