抄録
In order to clarify the fatigue behavior in a wide life region, fatigue tests in the life region of N=(10)^3∿(10)^9 were performed for high strength steel of SCM435 by means of a multi-type testing machine. Moreover, the statistical fatigue tests were carried out at several stress levels, and the statistical characteristics of the fatigue life distribution were investigated. The origin of fracture was observed using a microscope and the fatigue process was discussed.
