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http://dx.doi.org/10.3795/KSME-A.2002.26.11.2399

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

Kim, Jong-Sung (한국전력기술(주))
Lee, Seung-Gun (한국전력기술(주))
Jin, Tae-Eun (한국전력기술(주))
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.11, 2002 , pp. 2399-2408 More about this Journal
Abstract
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.
Keywords
Welding; Heat Affected Zone; Microstructure; Mechanical Material Property; Pressure Vessel Steel; Post Weld Heat Treatment; Temperature Analysis; Thermodynamics; Reaction Kinetics Model;
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