Effect of prestrain on and prediction of fatigue limit in carbon steel

The effect of prestrain on the fatigue limit of 0.1% (annealed) and 0.5% (quenched and tempered) carbon steel was investigated. Formulas for predicting the fatigue limit of carbon steels were proposed. The fatigue limit of 0.1% carbon steel increased with increasing surface hardness and surface comp...

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Bibliographic Details
Published in:International journal of fatigue 2007-09, Vol.29 (9), p.1855-1862
Main Authors: Kang, Minwoo, Aono, Yuuta, Noguchi, Hiroshi
Format: Article
Language:English
Subjects:
Applied sciences
Carbon steel
Exact sciences and technology
Fatigue
Fatigue limit
Hardness
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Precrack
Prestrain
Residual stress
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Summary:The effect of prestrain on the fatigue limit of 0.1% (annealed) and 0.5% (quenched and tempered) carbon steel was investigated. Formulas for predicting the fatigue limit of carbon steels were proposed. The fatigue limit of 0.1% carbon steel increased with increasing surface hardness and surface compressive residual stress imposed by prestrain. The fatigue limit decreased when precracks were generated on the surface, in spite of a large surface compressive residual stress in the case of 0.5% carbon steel. The precrack, variation of surface hardness and surface residual stress were considered to be parameters applicable in formulas for predicting the fatigue limit of prestrained carbon steels. The calculated results of such formulas showed good agreement with the experimental results.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2007.01.024