Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

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)
  • 김상천 (경북대학교 기계공학부 대학원) ;
  • 서창민 (경북대학교 기계공학부) ;
  • 황병원 (경북대학교 기계공학부) ;
  • 이태성 (경북대학교 기계공학부)
  • Published : 2004.05.01
Download PDF
⟨ Previous Next ⟩

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.

Keywords