Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)
- 2004.05a
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- Pages.370-375
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- 2004
Fatigue Characteristic of Bearing Steel(STB2) in Gigacycle
베어링강의 기가사이클 피로 특성에 관한 연구
- KIM SANG-CHUN (Graduate School of Mechanical Engineering, Kyungpook National University) ;
- SUH CHANG-MIN (School of Mechanical Engineering, Kyungpook National University) ;
- HWANG BYUNG-WON (School of Mechanical Engineering, Kyungpook National University) ;
- LEE TAE-SUNG (School of Mechanical Engineering, Kyungpook National University)
- Published : 2004.05.01
Abstract
Fatigue tests were carried out to find the fatigue characteristics in the super-long life range by using a cantilever type rotational bending fatigue test machine. Three kinds of specimen in bearing steels with the quenched and tempered in air (A and B, B: shot peened after heal treatment) and under vacuum conditions(C:non-shot peened)were tested in this study. S-N curves obtained from fatigue tests of C specimen tend to come dawn again in the super-long life range due to fish-eye type cracking, while most of A and B specimens fractured by surface defects such as scratches and slip lines. This duplex S-N behavior for the high strength steels have to be reviewed by the change of fracture modes.
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