圧力容器用低合金鋼の高温高圧水中疲労き裂伝ぱ挙動に及ぼす流速の影響

概要

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Effect of water flow rate on fatigue crack growth behavior in high temperature water simulating BWR environments was examined by using a flow rate change test method. Materials used in thie work were two types of low alloy pressure vessel steels A533B cl 1; one was medium sulfur material (S=0.014 wt%) and the other low sulfur material (S=0.004 wt%). Corrosion potentials during the tests were successfully measured in the relevant conditios. As a result, the fatigue crack growth rate in high temperature water was more accelerated with decreasing flow wate, and this trend was more striking for the medium sulfur material compared to the low sulfur material. Change of corrosion potential during the tests showed a good correlation with the change of water flow rate.
社団法人日本材料学会の論文
1992-11-15