セッションID: OS1812
会議情報
主催: 一般社団法人 日本機械学会
会議名: M&M2017 材料力学カンファレンス
開催日: 2017/10/07 - 2017/10/09
軸受用鋼球の圧縮疲労試験における剥離挙動に対する水素の影響
詳細
主催: 一般社団法人 日本機械学会
会議名: M&M2017 材料力学カンファレンス
開催日: 2017/10/07 - 2017/10/09
The effect of hydrogen on flaking and fatigue cracking in contact compressive fatigue of SUJ2 bearing steel were investigated using steel ball having artificial small hole. In this study, compressive fatigue test up to 107 cycles were carried out in 3 different environment : 1) 70 MPa high-pressure hydrogen, 2) ambient air and 3) 10-5 Pa high vacuum. In cases of high-pressure hydrogen, crack was initiated in all steel balls. on the other hand, in case of vacuum, there are no flaking. Therefore, it is seemed that hydrogen diffused to steel ball was harmful to fatigue properties of steel ball. But, in this time, there are no white etching area (WEA) at the flaking part of steel balls.
