The effect of residual stresses induced by prestraining on fatigue life of notched specimens |
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| Authors: | R Sadeler A Ozel I Kaymaz Y Totik |
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| Affiliation: | (1) Department of Mechanical Engineering, Faculty of Engineering, Ataturk University, 25240 Erzurum, Turkey |
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| 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. |
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| Keywords: | finite-element analysis prestraining residual stress rotating bending fatigue |
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