Abstract
In automotive industries, employing advanced high-strength steels such as dual-phase steels by taking advantage of high dynamic force absorption during car accidents and lightweight is one of the major challenges. In this regard, the effect of resistance spot welding parameters on the above great properties of advanced high-strength DP590 steel has been studied. In this study, the effect of optimized welding (spot resistance welding) on the weld microstructure was evaluated using optical microscopy as well as scanning electron microscope equipped with electron backscatter diffraction analysis (EBSD). Also, hardness profile along with the welding section was determined as mechanical property. The results showed that the welding practice has a significant influenced on the microstructure and microhardness of welded samples. The final microstructure of the nugget consisted of lath martensite, whereas in the HAZ, the microstructure was found to be mixture of coarse and fine martensite. The hardness profile was relevant to the above phase configuration. The phase variations along with different weld region were extensively characterized and discussed using EBSD technique.
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Ghandi, A., Shamanian, M., Rezaeian, A. et al. Study of DP590 Microstructure Welded with Resistance Spot Welding Method by Using EBSD Technique. Metallogr. Microstruct. Anal. 10, 266–275 (2021). https://doi.org/10.1007/s13632-021-00727-9
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DOI: https://doi.org/10.1007/s13632-021-00727-9