Characterization of oxide film on the SCC fracture surface was examined by using TEM and Micro Raman Spectrosc opy. The SCC sample cut from cracked component of the Onagawa Nuclear Power Plant was compared to CT-type labo ratory samples. The a-Fe2O3 distribution in the outer layer of the oxide film was the most characteristic of c rack growth rate. The enrichment of Cr was observed at crack tip and inner layer of all SCC samples with TEM....
英字タイトル:
Evaluation of Oxide Film on the Surface of SCC at Onagawa Nuclear Power Plant

The core shroud specimens (316L stainless steel) were used to characterize the surface hardening layer introduced by machining and to evaluate the SCC susceptibility in the simulated BWR coolant environment. Based on the results obtained, the effect of the surface hardening layer on the SCC susceptibility and its mechanism are discussed. It is suggested that the wall part has clearly higher SCC susceptibility than the support ring part when compared between the as-received materials (with surface hardening ...
英字タイトル:
Evaluation of SCC susceptibility of austenitic stainless steel with surface hardening layer in high-temperature water