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CF8M 주조 오스테나이트 스테인리스강의 열취화에 따른 재료물성치 평가
김철(C. Kim),방흥배(H. B. Park),진태은(T. E. Jin),정일석(I. S. Jeong),석창성(C. S. Seok),박재실(J. S. Park) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
CF8M cast austenitic stainless steel is used for several components such as primary coolant piping,<br/> elbow, pump casing, and valve bodies in light water reactors. These components are subject to thermal<br/> aging at the reactor operating temperature. Thermal aging results in spinodal decomposition of the<br/> delta-ferrite leading to increased strength and decreased toughness. In this study, three kinds of the<br/> aged CF8M specimen were prepared using an artificially simulated aging method. The objective of this<br/> study is to summarize the method of estimating ferrite contents, Charpy impact energy and J-R curve,<br/> and to evaluate the thermal embrittlement of the CF8M cast austenitic stainless steel piping used in the<br/> domestic nuclear power plants.