Factors by Which Shot Peening Influences the Fatigue Strength of Parts

Author:  Horace J. Grover
Source:  The Shot Peener magazine, Vol 12/Issue 2, Summer 1998
Doc ID:  1998036
Year of Publication:  1998
Abstract:  
INTRODUCTION It is somewhat less than a quarter of a century since shot peening was first used consciously to improve the fatigue strength of metal parts. During this time, considerable effort has been spent toward finding the improvement attainable in specific applications and methods for attaining this improvement. While all the factors which affect the improvement are not completely understood, a number of useful ideas concerning the mechanism of improvement have been advanced. The objective of this paper is to review these ideas toward an appreciation of the present status of understanding the effect of shot peening upon fatigue strength.