シンターハードニング高強度焼結鋼の疲労強度及び疲労亀裂伝播特性

概要

論文の詳細を見る
Fatigue strength and fatigue crack propagation behavior have been investigated for high tensile sinter-hardened steels about 500～1000MPa. The relation between the tensile strength and the fatigue strength has been established and the maximum fatigue strength has been obtained under 1000～1100MPa tensile strength range. The crack propagation behavior has been obtained using the compact tension specimens. The relation between the crack propagation rate and the lower limit of stress intensity factor range of Δ K_<th> has been made clear. The relation have been influenced by Ni content and sintered density. Propagation rate of high tensile sinter-hardened steel is faster than conventional high tensile steel. As for high tensile sinter-hardened steel, it was found that fatigue crack propagated through prior particle and grain boundaries.
福井工業大学の論文
2004-03-20