工具鋼の高サイクル疲労強度に及ぼす介在物, 炭化物の影響(<特集>疲労)

概要

論文の詳細を見る
Rotating bending, high-cycle fatigue properties of tool steels JIS SKD61 and SKD11 were discussed from viewpoints of the effects of non-metallic inclusion and carbide on the fatigue crack initiation and on the relationship between fatigue strength and hardness. Fatigue cracks initiated mostly from non-metallic inclusions or carbides depending on materials and heats. As the results, the fatigue strength at 10^8 cycles decreased compared with that estimated from the relationship between fatigue strength σ_<wb> and hardness HV for steels without any defect or with hardness less than HV400. In the case of inclusions being the crack initiation site, the value of σ_<wb>/HV decreased with increasing the weighted value of inclusions and with increasing hardness.
社団法人日本材料学会の論文
1996-01-15