DataVXScience and Technology of Welding and JoiningPaper
journal article·2021-02-17

Investigation on microstructure and properties of dissimilar joint between TRIP800 and QP980 fabricated by laser welding

Yanbing Guo, Yue Wu, Wang Zhang, Mengjia Xu, Liqun Li, Zhenggang Wu

Science and Technology of Welding and Joining· Volume 26· Issue 2
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Source abstract

Abstract

Dissimilar weld joints of QP980 and TRIP800 were fabricated by a fibre laser. The microstructure and mechanical properties of dissimilar weld joints were studied. The tensile properties of weld joints were not influenced by the narrow softening zone with a less reduction in hardness of ∼25 HV from the QP980, which contributed to fracture in TRIP800. The DIC images showed that the location of maximum strain was changed from the QP980 side to TRIP800 side during the tensile test of QP980 (1.2 mm)–TRIP800 (1.4 mm) joints. The dissimilar weld joints were characterised by the limited dome height test (LDH). The LDH values were varied with the punch pole location, as a result of the softening zone and non-uniform microstructure on the heat-affected zone of joints.
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Research context

OpenAlex topics: Microstructure and Mechanical Properties of Steels · Welding Techniques and Residual Stresses · High Temperature Alloys and Creep

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Engineering, Shanghai Dianji University, Shanghai, People’s Republic of China

Shanghai Key Lab of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, People’s Republic of China

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Haerbin, People’s Republic of China

College of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China

Funding

National Natural Science Foundation of China · State Key Laboratory of Advanced Welding and Joining

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