Study on Ductility Dip Cracking susceptibility in Filler Metal 82 during welding  

作　　者：Jing-Qing CHEN Hao LU Wei CUI 

机构地区：[1]School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Frontiers of Materials Science》2011年第2期203-208,共6页材料学前沿（英文版）

基　　金：Acknowledgements This research was sponsored by the National Natural Science Foundation of China （Grant No. 50975176）.

摘　　要：In this paper, Ductility Dip Cracking （DDC） susceptibility in Inconel600 companion Filler Metal 82 （FM82） under different stress states is investigated. Inconel600 is a Ni-Cr-Fe alloy with excellent resistance to general corrosion, localized corrosion, and stress corrosion, which has been widely used in nuclear power plants. However, the companion FM82 has been shown to be susceptible to DDC in welding process. To resolve the problem, this work is mainly focused on evaluating DDC susceptibility in FM82 in welding process. First of all, Strain to Fracture （STF） test is used to achieve the DDC criterion under simple stress state, and the formation mechanism of DDC was explained. Real welding is a process with complex stress state. Later, to get the DDC susceptibility under complex stress state, models about multi-pass welding were built up by means of finite element method. According to numerical simulation results, relationship of deformation and temperature history is achieved. Moreover, susceptible locations and moments could be determined associated with STF results. The simulation results fairly agree with welding experiment from another research.In this paper, Ductility Dip Cracking （DDC） susceptibility in Inconel600 companion Filler Metal 82 （FM82） under different stress states is investigated. Inconel600 is a Ni-Cr-Fe alloy with excellent resistance to general corrosion, localized corrosion, and stress corrosion, which has been widely used in nuclear power plants. However, the companion FM82 has been shown to be susceptible to DDC in welding process. To resolve the problem, this work is mainly focused on evaluating DDC susceptibility in FM82 in welding process. First of all, Strain to Fracture （STF） test is used to achieve the DDC criterion under simple stress state, and the formation mechanism of DDC was explained. Real welding is a process with complex stress state. Later, to get the DDC susceptibility under complex stress state, models about multi-pass welding were built up by means of finite element method. According to numerical simulation results, relationship of deformation and temperature history is achieved. Moreover, susceptible locations and moments could be determined associated with STF results. The simulation results fairly agree with welding experiment from another research.

关 键 词：Ductility Dip Cracking （ODC） welding inconel600 numerical simulation 

分 类 号：TG409[金属学及工艺—焊接] TU528.01[建筑科学—建筑技术科学]