2313 硬さの異なるSCM435H鋼の疲労特性に及ぼす微粒子ピーニングの影響(S07-3 疲労強度,S07 構造材料の疲労強度とき裂進展問題)

概要

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In order to clarify the effect of FSP treatment on fatigue properties of SCM435H steel with two levels of hardness, high cycle fatigue tests were carried out with a rotational bending machine at room temperature. The effect of substrate hardness on efficiency of FSP treatment was discussed. In the case of higher hardness substrate, the fatigue strength was dominantly increased by FSP treatment. However, in the case of lower hardness substrate, the increasing level was very small. This was because compressive residual stress generated on the surface of the higher hardness specimen was much larger than that generated on the lower hardness specimen. Furthermore, the higher compressive residual stress was very stable under the application of cyclic loading. These results imply that the FSP treatment is very effective for higher hardness substrate.
社団法人日本機械学会の論文
2007-09-07