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AISI 304L 스테인리스 강의 크리프-피로 상호작용에 미치는 인 (P) 의 영향
위당문,남수우,윤영철,김중재 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.11
Effect of phosphorus on the creep-fatigue interaction of 304L stainless steel was investigated at the test temperature of 823K. The microstructural observation was very distinctive. As the content of phosphorus increases, the density of grain boundary carbide decreases. The results of creep-fatigue test for the three materials show that the effect of phosphorus is beneficial for the fatigue life under creep-fatigue loading condition. Since the segregation of phosphorus on grain boundary lowers grain boundary diffusivity and the density of grain boundary carbides, the nucleation site and growth rate of cavity is considered to be decreased as the content of phosphorus increases. Therefore, the addition of phosphorus to 304L stainless steel is believed to prolong the creep-fatigue life.