Effect of Shot Peening on the Fatigue Behavior of some Sintered Steels

Sergio Baragetti; Riccardo Gerosa; Giuseppe Silva; Barbara Rivolta

doi:10.4028/www.scientific.net/KEM.488-489.511

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 488-489Effect of Shot Peening on the Fatigue Behavior of...

Effect of Shot Peening on the Fatigue Behavior of some Sintered Steels

Abstract:

Shot peening is a mechanical treatment usually performed on metals for improving the mechanical properties of the surface layers. The application of such treatment to sintered steels causes a local surface densification and the birth of residual compression stresses. In this paper, the effect of different shot peening cycles, selected after a preliminary optimization, has been investigated focusing especially on the fatigue resistance measured by bending tests and on the surface residual stresses measured by XRD technique. Two high performances PM steels were considered: the former was sintered starting from a diffusion bonded powder, whereas the latter is based on a pre-alloyed powder. Two different nominal densities were considered, 6.9g/cm³ and 7.1g/cm³.

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Periodical:

Key Engineering Materials (Volumes 488-489)

Pages:

511-514

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.488-489.511

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Online since:

September 2011

Authors:

Sergio Baragetti, Riccardo Gerosa, Giuseppe Silva, Barbara Rivolta

Keywords:

Fatigue Resistance, Shot Peening, Sintered Steel

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