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The effect of residual stresses induced by prestraining on fatigue life of notched specimens

  • R. Sadeler
  • A. Ozel
  • I. Kaymaz
  • Y. Totik
Testing and Evaluation
  • 119 Downloads

Abstract

The effect of tensile prestraining-induced residual stress on the fatigue life of notched steel parts was investigated. The study was performed on AISI 4140 steel. Rotating bending fatigue tests were carried out on semicircular notched specimens with different notch radii in the as-quenched and tempered conditions. Metallography of the specimens was performed by means of light optical microscopy. The finite-element method was used to evaluate the residual stress distribution near the notch region. Fatigue tests revealed fatigue life improvement for notched specimens, which changes depending on the notch radii and applied stress. Scanning electron microscopy was used to examine the fracture surfaces of the specimens.

Keywords

finite-element analysis prestraining residual stress rotating bending fatigue 

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Copyright information

© ASM International 2005

Authors and Affiliations

  • R. Sadeler
    • 1
  • A. Ozel
    • 1
  • I. Kaymaz
    • 1
  • Y. Totik
    • 1
  1. 1.Department of Mechanical Engineering, Faculty of EngineeringAtaturk UniversityErzurumTurkey

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