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Title: Shot Peening Effect on Fatigue Crack Initiation of Surface Notches
Author: J. Ferreira, L. Borrego, J. Costa
Source: Conf Proc: ICSP-5, (p.238-245)
Publication year 1993
Document number: 1993076
Number of pages: 7
Abstract:
This paper presents results of a fatigue crack initiation life investigation carried out in notched bend specimens. The material of the specimens was the A515 Grade 70
steel. The life initiaion was pedicted for a range of the notch size. The nonotonic and cyclic mechanical properties were experimentally determined in this work. The stress
notch size in the initiation life was obtained experimentally for the stress ratios of 0 to 0.4 and for shot peening specimens. A good agreement was obtained between the
predictions and experimentally results for the two stress ratios. An improtant improvement of the initiaion life was observed for the shot peening specimens.
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