Effect of Shot-Peening on Fatigue Strength: A literature Survey and Alalysis

Author:  R. P. Felgar
Source:  General Electric Co, Schenectady, New York
Doc ID:  1958026
Year of Publication:  1958
Abstract:  
During the last twenty years numerous papers have been published in which the beneficial effects of shot-peening are discussed. The results of fatigue tests are presented for two types of specimens: service parts such as springs, axles and crankshafts and laboratory specimens such as are used in a R. R. Moore or Krouse fatigue testing machine. The beneficial effects of shot-peeing service parts are usually more pronounced than the beneficial results of shot-peening laboratory specimens. On the other hand, it is more difficult to isolate the effects of shot-peening producing an increased fatigue strenth of service parts than it is to isolate these effects in shot-peened laboratory specimens. In this paper some of the results which are available in the literature for fatigue tests on service parts will be presented, followed by the results of fatigue tests on laboratroy specimens. The factors responsible for the increased fatigue strength will then be isolated and treated in a rational manner where possible.