The Evaluation for Elastic-Plastic Fracture Toughness in a Reactor Pressure Vessel Steel(SA508-3)

J. Ocean Eng. Technol. 1993;7(2):91-102.

원자력 압력용기강(SA508-3)의 탄소성 파괴인성 평가

오세욱,윤한기,임만배

동아대학교 공과대학기계공학과,동아대학교 공과대학기계설계과,동아대학교 공과대학기계공학과

Keywords: Elastic-Plastic Fracture Toughness, Blunting Line, R-curve, Stretched Zone Width

핵심용어: 탄소성 파괴인성, 둔화직선, R곡선, 스트레치존 폭

Abstract

The elastic-plastic fracture thoughness J sub(IC) of Nuclear Reactor Vessel Steel(SA 508-3) which has high toughness was discussed at temperatures RT, $-20^{circ}C$, $200^{circ}C$ and 1/2/CT specimen was used for this study. Especially the two methods recommended in ASTM and JSME were compared. It was difficult to find J sub(IC) by ASTM R-curve method with the specimen used for this research, while JSME R-curve method yielded good result. The stretched zone width menthod gave slightly larger J sub(IC) values than those by the R-curve method for SA 508-3 steel.