Fatigue Fracture Behavior of Bearing Steel GCr15 in Very High CycleRegime
In order to investigate the fatigue behaviors in very high cycle fatigue regime of bearingsteel GCr15 (Chinese standard),cantilever-type rotary bending fatigue test was carried out,by usingan hourglass-shaped specimen.As a result,the S-N data were classified into surface grinding flawor inclusion induced fracture mode,subsurface inclusion without granular-bright-facet (GBF) areainduced fracture mode and subsurface inclusion with GBF area induced fracture mode.Formationof a GBF area was clearly observed in the vicinity of subsurface inclusion on the fracture surfaceruptured at high-cycle fatigue regime.The cause of the S-N curves of GCr15 obtained by thisexperiment continuously decreased,which is different from the common duplex S-N curve.Experiments on fracture surface was carried out based on the dispersive decohesion of sphericalcarbide model aimed to clarify the mechanism of the formation of GBF area.
Very High Cycle Fatigue Subsurface Crack Bearing Steel Inclusion GBF
J.W.Zhang K.Shiozawa L.T.Lu W.Li W.H.Zhang
State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China Department of Mechanical and Intellectual System Engineering,Toyama University,Toyama 930-8555,Japan School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,C
国际会议
成都
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）