Overview Of The Effects Of Surface Enhancement Processes On Plastic Strain, Work Hardening And Residual Stresses

Author:  B Bhuvaraghan, O Prakash, Sivakumar M.S., Y Potdar
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008057
Year of Publication:  2008
Abstract:  
ABSTRACT Compressive surface stresses are found to enhance the fatigue life of components, as fatigue cracks originate mostly from surfaces. From among the various surface enhancement processes, this review paper focuses on shot peening methods since they are the most complex in evaluating the material response due to the inherent stochastic nature of several variables. Peening can produce different amounts of near surface plastic deformation for the same residual stress and vice versa for different combinations of input parameters. Knowing the reasons why such variations occur will enhance the understanding of shot peening and other residual stress inducing processes. Many researchers have done experimental and theoretical studies to understand the underlying mechanisms of shot peening. This paper provides an overview of that extensive research and suggests some remaining tasks.