대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제26권11호
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  • Pages.2399-2408
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  • 2002
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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압력용기강 용접 열영향부에서의 미세조직 및 기계적 물성 예측절차 개발 및 적용성 평가

Development and Evaluation of Predictive Model for Microstructures and Mechanical Material Properties in Heat Affected Zone of Pressure Vessel Steel Weld

  • 발행 : 2002.11.01
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초록

A prediction procedure has been developed to evaluate the microtructures and material properties of heat affected zone (HAZ) in pressure vessel steel weld, based on temperature analysis, thermodynamics calculation and reaction kinetics model. Temperature distributions in HAE are calculated by finite element method. The microstructures in HAZ are predicted by combining the temperature analysis results with the reaction kinetics model for austenite grain growth and austenite decomposition. Substituting the microstructure prediction results into the previous experimental relations, the mechanical material properties such as hardness, yielding strength and tensile strength are calculated. The prediction procedure is modified and verified by the comparison between the present results and the previous study results for the simulated HAZ in reactor pressure vessel (RPV) circurnferential weld. Finally, the microstructures and mechanical material properties are determined by applying the final procedure to real RPV circumferential weld and the local weak zone in HAZ is evaluated based on the application results.

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참고문헌

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피인용 문헌

  1. Numerical Evaluation of Backward Extrusion and Head Nosing for Producing a 6.75L Small Seamless AA6061 Liner vol.22, pp.4, 2013, https://doi.org/10.5228/KSTP.2013.22.4.204