Effect of Shot Peening on Delayed Fracture of High Strength Steel

Author:  Y. Watanabe and N. Hasegawa
Source:  Conf Proc: ICSP-5, (p.219-225)
Doc ID:  1993074
Year of Publication:  1993
Abstract:  
A study has been made on the effect of shot peening on delayed fracture susceptibility of high strength steel at a level of 1300MPa. By means of bending type testing, it was confirmed that the delayed fracture resistance improves due to an increase in compressive residual stress by shot peening. Further study indicates that the increased resistance to delayed fracture of shot peened specimens is caused mainly by the prologed incubation period to crack initiation.