Prediction of the Residual Welding Stress in 2.25Cr-1Mo Steel by Taking into Account the Effect of the Solid-State Phase Transformations
来源期刊：Acta Metallurgica Sinica2013年第3期
论文作者：Dean DENG Yangang TONG Ninshu MA Hidekazu MURAKAWA
文章页码：333 - 339
摘 要：A computational approach based on the thermal elastic plastic finite element method was developed for predicting welding residual stress in low carbon alloyed steel welds by taking into account the effect of the solid-state phase transformations. The kinetics of phase transformations was described by Johnson Mehl Avrami Kolmogrov （JMAK） equation for bainitic transition and by Koistinen-Marburger （K-M） relationship for martensitic transition. Moreover, an additive rule depending on volumetric phase fraction was adopted to represent the material property changes during heating and cooling. Consequently, the residual welding stresses in a 2.25Cr1Mo steel TIG welded plate were computed. Early calculation results suggest that the bainitic and martensitic transformations took place in the weld the heat-affected zone drastically reduce the residual longitudinal tensile stress in the region.
Dean DENG1,2，Yangang TONG1，Ninshu MA3，Hidekazu MURAKAWA3
1. College of Materials Science and Engineering, Chongqing University2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology3. JWRI, Osaka University,11-1, Mihogaoka,Ibaraki, Osaka 567-0047, Japan
摘 要：A computational approach based on the thermal elastic plastic finite element method was developed for predicting welding residual stress in low carbon alloyed steel welds by taking into account the effect of the solid-state phase transformations. The kinetics of phase transformations was described by Johnson Mehl Avrami Kolmogrov （JMAK） equation for bainitic transition and by Koistinen-Marburger （K-M） relationship for martensitic transition. Moreover, an additive rule depending on volumetric phase fraction was adopted to represent the material property changes during heating and cooling. Consequently, the residual welding stresses in a 2.25Cr1Mo steel TIG welded plate were computed. Early calculation results suggest that the bainitic and martensitic transformations took place in the weld the heat-affected zone drastically reduce the residual longitudinal tensile stress in the region.
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