抄録
Creep fracture characteristics consist of the initiation and growth behavior of creep voids , creep fracture mode, and rupture life. However, initiation and growth behavior of creep voids in multi-axial stress states have not been made clear. In this study, using ductile austenitic steel SUS310S. tensile creep, torsional creep and tensile-torsional creep tests with tubular specimens are conducted at 700℃. Creep voids in test-stopped specimens are examined in detail by observation on the scanning electron micrographs. The initiation and growth behaviors of creep voids under multi-axial stress conditions are discussed.
