セッションID: OS0818
会議情報
主催: 一般社団法人 日本機械学会
会議名: M&M2018 材料力学カンファレンス
開催日: 2018/12/22 - 2018/12/24
Ni基合金の疲労破壊における結晶粒界の影響
詳細
主催: 一般社団法人 日本機械学会
会議名: M&M2018 材料力学カンファレンス
開催日: 2018/12/22 - 2018/12/24
Existence of grain boundary has generally considered to influence on fatigue strengths of materials. To study the influence on a Ni-based superalloy (CMSX-4) at 650°C, fatigue tests were carried out for bicrystal specimens with a low-angle grain boundary. Fatigue failure criterion based on the maximum shear stress range on the octahedral slip systems was used, to evaluate influence of fatigue strengths of grain boundary. It was suggested that influence of a low-angel grain boundary was small for fatigue strength.
