Evaluation on High Temperature Fracture toughness of Pressure Vessel SA516/70 Steel

J. Ocean Eng. Technol. 2001;15(2):99-104.

압력용기용 SA516/70강의 고온파괴인성평가

박경동,김정호,윤한기,박원조

부경대학교 기계공학부,부경대학교 대학원 기계공학과,동의대학교 기계산업시스템 공학부,경상대학교 기계수송공학부

Keywords: Pressure vessel steel, High temperature fracture toughness, fracture resistance curve, Unloading compliance method, Side groove effect

핵심용어: 압력용기용, 고온파괴인성, 파괴저항곡선, 제하컴플라이언스법, 측면홈 효과

Abstract

Elastic-plastic fracture toughness $J_{lc}$ can be used as an effective design criterion in elastic plastic fracture mechanics. Most of these systems are$J_{lc}$ $J_{lc}$ value at high temperature must be determined for use of integrity evaluation and designing of such systems. Elastic-plastic fracture toughness $J_{lc}$ tests were performed on SA516/70 carbon steel plate and test results were analyzed according to ASTM E 813-87, ASTM E 813-89 and ASTM E 1152-87.safety and integrity are required for reactor pressure vessels because, they are operated in high temperature. There are single specimen method, which used as evaluation of safety and integrity for reactor pressure vessels. In this study, elastic-plastic fracture toughness($J_{lc}$) and J-$Delta$a of SA 516/70 steel used as reactor pressure vessel steel are measured and evaluated at room temperature, 150$^{circ}C $, 250$^{circ}C $ and 370$^{circ}C $ according to unloading compliance method.