Author/Authors :
Sekine، نويسنده , , M. and Sakaguchi، نويسنده , , N. and Endo، نويسنده , , M. and Kinoshita، نويسنده , , H. and Watanabe، نويسنده , , S. and Kokawa، نويسنده , , H. Toshihiko Yamashita، نويسنده , , S. and Yano، نويسنده , , Y. and Kawai، نويسنده , , M.، نويسنده ,
Abstract :
Austenitic stainless steel PNC316 was subjected to grain boundary engineering (GBE). It was found that the grain boundary engineered PNC316 (PNC316-GBEM) had a coincidence site lattice (CSL) fraction of 86% and that the network of random grain boundaries was perfectly divided by the CSL boundaries. The thermal stability and the void swelling behavior of PNC316-GBEM were investigated by means of SEM and TEM analyses. After thermal aging at 973 K for 100 h, structural changes were observed neither in the grain boundary networks of PNC316-GBEM nor in another sample of PNC316-GBEM subjected to 20% additional cold rolling, PNC316-GBEM20%CW. PNC316-GBEM showed a higher void swelling rate than as-received PNC316 (PNC316-AS). However, with additional 20% cold rolling after GBE, the void swelling rate decreased to as low as that of PNC316-AS.
