9~12% Crフェライト系耐熱鋼の微細構造と粒界析出物
2004 年 90 巻 1 号 p. 27-32
詳細
2004 年 90 巻 1 号 p. 27-32
Observation of electropolished surface by FE-SEM revealed a multiscale structure composed of prior austenitic grains, packets, blocks and precipitates for ferritic heat-resisting steels. After the creep-fatigue tests the microstructure showed little change except for the precipitate's size and density. Drastic changes of dislocation subgrains within the block were observed by TEM. Occupancy of the precipitates on prior austenitic grain boundaries was newly proposed as an index of creep-fatigue damage.
