Effects of an Artificial Small Defect on Torsional Fatigue Strength of Steels
- 1 April 1987
- journal article
- Published by ASME International in Journal of Engineering Materials and Technology
- Vol. 109 (2) , 124-129
- https://doi.org/10.1115/1.3225951
Abstract
In order to elucidate the effect of small defects on the torsional fatigue strength of steels, reversed torsion tests were carried out on the 0.46 percent C steel specimens containing a small hole. The hole diameter ranges from 40 to 500μm. The fatigue behaviors on the specimen surface and near the hole were observed with the aid of a microscope. The torsional fatigue strength of steels containing small holes can be predicted from the results of rotating bending fatigue test by considering the threshold condition for crack propagation.Keywords
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