抄録
In order to clarify investigate influence factors on the high-cycle fatigue of high strength steel SUJ2,the fatigue tests have been carried out up to (10)^8 cycles under rotating bending at room temperature. The higher stress amplitude damage to specimen surface under the condition of two step stress amplitude, Surface failure is observed even in the specimen broken in high cycle region. It considered that fretting corrogion of specimen's handle has an effect on fatigue life in high cycle region.
