Abstract
The present study focused on single and multiple dissimilar joints between DP980 and high-strength low-alloy (HSLA) galvanized steels. The tensile properties of the dissimilar joint between the strong DP980 and the relatively soft HSLA reflected only the properties of HSLA with plastic deformation, and final fracture took place entirely in HSLA. The fatigue properties of the dissimilar joints were more intriguing, with the strong DP980 outperforming at high stress amplitude and the ductile HSLA outperforming at low stress amplitude. For different load amplitudes, fatigue failure occurred in different materials and at different locations. The fatigue strength of DP980 was more negatively impaired by weld defects than that of HSLA.
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Acknowledgments
The authors would like to thank the National Natural Science Foundation of China (No. 51304045), the China Scholarship Council (CSC), Natural Sciences and Engineering Research Council of Canada (NSERC) and AUTO21 Network of Centers of Excellence for providing financial support. The financial support from International Zinc Association (IZA) and Arcelor-Mittal Dofasco is highly acknowledged. One of the authors (D.L.Chen) is grateful for the financial support by the Premier’s Research Excellence Award (PREA), NSERC-Discovery Accelerator Supplement (DAS) Award, Canada Foundation for Innovation (CFI), and Ryerson Research Chair (RRC) program. The authors would like to thank Dr. J. Chen and Dr. Y.L. He (CANMET-Materials Technology Laboratory, Natural Resources Canada, Hamilton, Canada), Mr. E. Biro (ArcelorMittal Global Research, Hamilton, Canada), and Dr. J. Villafuerte (CenterLine (Windsor) Ltd., Windsor, Canada) for their support and helpful discussion. The assistance of Q. Li, A. Machin, J. Amankrah, and R. Churaman in performing the experiments is gratefully acknowledged.
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Cui, Q.L., Parkes, D., Westerbaan, D. et al. Tensile and Fatigue Properties of Single and Multiple Dissimilar Welded Joints of DP980 and HSLA. J. of Materi Eng and Perform 26, 783–791 (2017). https://doi.org/10.1007/s11665-016-2454-0
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DOI: https://doi.org/10.1007/s11665-016-2454-0