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Title: Influence of shot peening intensity on fatigue design reliability of 65Si7 spring steel
Authors: Aggarwal, M L
Khan, R A
Agrawal, V P
Issue Date: Dec-2005
Publisher: CSIR
IPC CodeC22F1/00, G01N3/00
Abstract: A lot of research has been done to improve the fatigue strength of metallic materials by creating compressive residual stress field (CRSF) in their surface regions through shot peening. In this paper, the axial fatigue strength of 65Si7 spring steel is evaluated experimentally as a function of shot peening intensity for the application in the automotive vehicles. Fatigue life at various shot peening conditions is determined with S/N curves and optimum shot peening intensity is also determined. The effect of Almen intensity on compressive residual stress and relaxation of compressive residual stress have been discussed for fatigue life extension. Shot peening of leaf springs is illustrated to cause improvement in fatigue strength, reduction in weight and reliability. A flow chart has been developed for improvement in fatigue design of components for economy.
Page(s): 515-520
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.12(6) [December 2005]

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