K-2217 炭素鋼のBWR模擬環境中疲労寿命に及ぼす流速の影響(J14-4 & J12 伝熱現象の応用)(J14 & J11 & J12 原子力利用技術と熱問題)

概要

論文の詳細を見る
Fatigue tests were performed under simulated BWR conditions with changing the water flow rates between 1×10^<-5> m/s and 7 m/s. No fatigue life difference was found between different flow rates under high strain rate condition of 0.4%/s. Under low strain rate conditions of 0.01%/s however, fatigue lives were longer under high flow rate conditions than those under low flow rate conditions. Under the low flow rate condition, there was evidence on the fracture surface that the large size MnS inclusion caused the acceleration of the crack propagation rate. On the contrary, no such evidence was found under high flow rate conditions. Flushing of corrosive environment that is induced by dissolution of the MnS inclusion is considered to be the main factor that lowered the environmental effect of water on fatigue lives.
一般社団法人日本機械学会の論文
2001-08-22