The Influence of Stress Ratio on Super-Long-Life Fatigue Behavior in High Carbon-Chromium Bearing Steel, SUJ2
抄録
In this study, fatigue tests were performed to investigate of the influence of stress ratio on super-long-life fatigue properties of high-carbon chromium bearing steel (SUJ2) under axial loading at three different stress ratios, R, -1, 0 and 0.5. From the experimental results, interior inclusion induced fracture occurred in each stress ratio and the fatigue life of subsurface fracture mode under axial loading was decreased as compared with that of rotating bending fatigue tests. The granular bright facet (GBF) area was observed in the vicinity of the inclusion of fracture origin in the long life region of N_f>10^6 cycles, the roughness of the GBF area correlated with the stress intensity factor range of the inclusion.
高炭素クロム軸受鋼SUJ2の超長寿命軸疲労特性に及ぼす応力比の影響(S22-1 高強度鋼,S22 ギガサイクル疲労)
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