Residual Stress Evolution during Fatigue Test of a Shoot Peened Steel Sample

Abstract:

Directly-generated compressive residual stress has become a widely used surface modification technique. Intentional residual stress in solid materials can be produced by different surface compression methods. It is well known how residual stress field is influenced by the parameters of inducing technology, but during the operation of a surface compressed machine element the problem of compressive residual stress relaxation can occur. Only few articles address this phenomenon. The literature on residual stress decrease caused by fatigue load is scarce and the kinetics of this mechanism is not yet investigated. The present work reports on the examination of the effect of the fatigue load on compressive residual stress strengthened specimens. Investigations have been conducted at three stress levels. Residual stress data have been measured before fatigue load and measurements have been repeated after defined fatigue cycles.

• Periodical: Materials Science Forum (Volume 752)
• Pages: 95-104
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.752.95
• Online since: March 2013
• Authors: Dávid Cseh, Valéria Mertinger, János Lukács
• Keywords: Fatigue, Modified sin²ψ, Residual Stress, X-Ray Diffraction (XRD)

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