改良9Cr-1Mo鋼の高温疲労寿命に及ぼす圧縮ひずみ保持の影響

概要

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The present paper describes a study on the effect of compressive strain hokding on the high-temperature strength of Modified 9Cr-1Mo steel,a candidate steel for steam generator in a Japanses demonstrative fast breeder reactor,FBR.As usually known,the high-temperature fatigue strength of the Modified 9Cr-1Mo steel was significantly reduced by compressive strain holding.According to our observation by a scanning electron microscope,SEM,on the main-crack surface of the specimens failed under compressive strain holding,striations were clearly observed under compressive strain holding in air and tearing dimples in vacuum.It was guessed that compressive strain holding conditions and this resulted in the reduction of the high temperature fatigue strength under compressive strain holding conditions.
社団法人日本材料学会の論文
1993-11-15