Effect of shot peening on the fatigue behavior of some sintered steels

被引：1

作者：

Baragetti, S. ^{[1
]}

Gerosa, R. ^{[2
]}

Silva, G. ^{[2
]}

Rivolta, B. ^{[2
]}

机构：

[1] Univ Bergamo, Dept Design & Technol, Vle Marconi 5, I-24044 Dalmine, Italy

[2] Politecn Milan, Dipartimento Meccan, Milan, Italy

来源：

ADVANCES IN FRACTURE AND DAMAGE MECHANICS X | 2012年 / 488-489卷

关键词：

sintered steels; shot peening; fatigue resistance;

D O I：

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

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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/cm(3) and 7.1g/cm(3).

引用

页码：511 / +

页数：2

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