OS2106 軸受鋼の応力漸減回転曲げ疲労挙動に対する高応力域繰返し数依存性の一考察

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  • OS2106 A Study of Cyclic High Stress Counts Dependence on fatigue Behavior for Bearing Steel in Rotating Bending under Decremental Step Loading

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In order to examine the fine granular area (FGA) formed timing in high cycle fatigue for bearing steel, the rotating bending tests were carried out under two conditions of decremental step loading. The cumulative damage value of stress cycles at the high stress level was 0.1 against the average of the fatigue life in the interior inclusion induced fracture. And the cumulative damage values were 0.14 and 0.32 against the average of the fatigue life in the surface induced fracture. In this experiment, the roll processing performed in order to improve a fatigue life in surface induced fracture mode. From the experimental results, the different fine granular area aspect from stress constant cases was observed.

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