Creep-fatigue tests were conducted using smooth specimens of a Type 304 stainless steel at 923K through 1073K and the characteristics of small cracks were observed. The morphology of the fracture was classified into three types; (1) transgranular cracking on the specimen surface, which is similar to that in room temperature fatigue, (2) intergranular cracking on the specimen surface due to creep, and (3) intergranular cracking inside the specimen due to creep. Type (2) was mainly caused by grain boundary sliding at the specimen surface where the constraint was weak, while Type (3) was brought about by cavities due to grain boundary diffusion coupling with creep deformation of grains, which showed the shortest fatigue lives. The creep-fatigue failure map was constructed in terms of three types of cracking in the 3D-expression of tensile strain rate, compressive strain rate and temperature.
|Number of pages||6|
|Journal||American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP|
|Publication status||Published - Dec 1 1995|
|Event||Proceedings of the 1995 1995 Joint ASME/JSME Pressure Vessels and Piping Conference - Honolulu, HI, USA|
Duration: Jul 23 1995 → Jul 27 1995
ASJC Scopus subject areas
- Mechanical Engineering