한국압력기기공학회 논문집 (Transactions of the Korean Society of Pressure Vessels and Piping)

한국압력기기공학회 (Korean Society of Pressure Vessels and Piping)
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주조 오스테나이트 스테인리스강 상경계 균열부 산화물 분석

Analysis of Oxide Layers in Phase Boundary Crack of Cast Austenitic Stainless Steel

  • 최민재 (한국원자력연구원 재료안전기술연구부) ;
  • 김성우 (한국원자력연구원 재료안전기술연구부)
  • Min-Jae Choi ;
  • Sung-Woo Kim
  • 투고 : 2023.12.01
  • 심사 : 2023.12.21
  • 발행 : 2023.12.30
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초록

For the phase boundary crack found in the gasket made of cast austenitic stainless steel in the nuclear power plant, the oxide layers were analyzed through SEM and TEM. The results showed that cracks initiated and propagated along the austenite/δ-ferrite phase boundary, the propagation path was changed to penetrate the inside of the phase. The oxide layer located at the periphery of the crack along the phase boundary was identified as a complex multi-layered spinel structure, and Cr-rich carbides were also detected in the oxide. The cracks that propagated inside the austenite matrix were attributed to the presence of high external stresses and impurities.

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과제정보

이 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(2021M2E4A1037979).

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