Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 22, 2018 - December 24, 2018
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.
