Influence Of Shot Peening On The Initiation And Propagation Of Fatigue Crack In Some Construc.steels

Author:  Deng, Jin, Zhou
Source:  Conf Proc: ICSP-1, (p.389-394)
Doc ID:  1981035
Year of Publication:  1981
Abstract:  
The results of an experimental investigation on the effect of shot peening upon the initiation and propagation of fatigue cracks and its relation to the mechanical behavior parameters of the materials are presented. Shot peening predominantly elongates the crack initiation period N sub i and has comparatively minor effect on the crack propagation period N sub p. The correlation between N sub i for shot-peened specimens with residual stress sigma sub r and strain hardening exponent n of the material may be expressed by the formula: N sub i (s) = A + B (--sigma sub r) exp (an + b). Tests were conducted on steels 18CrNiW, 20SiMnMoV and 35CrMo. Descriptors: Shot peening-- Mechanical properties; Crack propagation; Low alloy steels-- Mechanical properties; Fatigue (materials); Strain hardening