Grain boundary engineering of austenitic steel PNC316 for use in nuclear reactors

作者：Sekine M; Sakaguchi N^*; Endo M; Kinoshita H; Watanabe S; Kokawa H; Yamashita S; Yano Y; Kawai M

来源：Journal of Nuclear Materials, 2011, 414(2): 232-236.

DOI：10.1016/j.jnucmat.2011.03.049

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.

• 出版日期2011-7-15