In this paper the substantial meaning of C* parameter was clarified. And it was found that C* parameter does not relate to the local stress field but creep elongation rate. Also creep damage was found to be a concentrated region of micro cracking along the grain boundary and to be represented by one characteristic curve independent on gross stress, temperature, shapes of notch against the nondimensional time controlled by creep rupture life. Creep crack growth rate was influenced by creep damage and it was due to the accumulated creep damage before creep crack initiation, which was mainly influenced by the effect of notch shape.
|Number of pages||6|
|Journal||Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - 1991 Jul|
ASJC Scopus subject areas
- Mechanical Engineering