**4. Conclusions**


continuously, the tensile shear force decreased because of a large number of spatters and the high indentation rate. The failure modes mainly depended on the weld nugget width at the overlap surface and welding defect. Therefore, while the CR590T/340YDP galvanized dual phase steel sheets with 2 mm thickness were performed using resistance spot welding, the recommended welding current was 10.0~10.5 kA with a 20 cycles welding time and 4.0 kN electrode force.

**Author Contributions:** Writing, funding acquisition and investigation, X.Z.; conceptualization, methodology and supervision, Z.R.; validation and investigation, F.Y.; formal analysis and data curation, H.Y.

**Funding:** This research was funded by Jilin Scientific and Technological Development Program (20160520055JH).

**Conflicts of Interest:** The authors declare no conflict of interest.
