Effect of Shot Peening on Fatigue Behavior of AISI 4340 in Different Loading Conditions

Marcelo A.S. Torres; D.T. Harada; Carlos Antonio Reis Pereira Baptista; Maria P. Cindra Fonseca

doi:10.4028/www.scientific.net/KEM.713.30

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 713Effect of Shot Peening on Fatigue Behavior of AISI...

Effect of Shot Peening on Fatigue Behavior of AISI 4340 in Different Loading Conditions

Abstract:

Shot peening is a method widely used to improve the fatigue strength of materials, through the creation of a compressive residual stress field (CRSF) in their surface layers. In the present research the gain in fatigue life of AISI 4340 steel, obtained by shot peening treatment, is evaluated under the three different hardnesses used in landing gear. Rotating bending fatigue tests and alternating tension tests were conducted and the CRSF was measured by x-ray tensometry prior and after interrupted fatigue tests. The evaluation of fatigue life after shot peening in relation to the relaxation of CRSF, of the crack initiation sites and surface roughness is done.

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Periodical:

Key Engineering Materials (Volume 713)

Pages:

30-33

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.713.30

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Online since:

September 2016

Authors:

Marcelo A.S. Torres*, D.T. Harada, Carlos Antonio Reis Pereira Baptista, Maria P. Cindra Fonseca

Keywords:

AISI 4340 Steel, Fatigue, Residual Stresses, Shot Peening

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* - Corresponding Author

References

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