scholarly journals Dissimilar metal joining of aluminum to steel by ultrasonic plus resistance spot welding - Microstructure and mechanical properties

2019 ◽  
Vol 165 ◽  
pp. 107585 ◽  
Author(s):  
Ying Lu ◽  
Ellis Mayton ◽  
Hyeyun Song ◽  
Menachem Kimchi ◽  
Wei Zhang
Keyword(s):  
Mechanical Properties ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Resistance Spot ◽  
Dissimilar Metal ◽  
Microstructure And Mechanical Properties ◽  
Dissimilar Metal Joining

scholarly journals Effect of Welding Current on Weld Formation, Microstructure, and Mechanical Properties in Resistance Spot Welding of CR590T/340Y Galvanized Dual Phase Steel

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2310 ◽  
Author(s):  
Xinge Zhang ◽  
Fubin Yao ◽  
Zhenan Ren ◽  
Haiyan Yu
Keyword(s):  
Mechanical Properties ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Welding Current ◽  
Dual Phase ◽  
Weld Formation ◽  
Resistance Spot ◽  
Microstructure And Mechanical Properties ◽  
Body Production

During resistance spot welding, the welding current is the most important process parameter, which determines the welding heat input and then has a great influence on the welding quality. In present study, the CR590T/340YDP galvanized dual phase steel widely used as automobile material was carried out using resistance spot welding. The effect of welding current on the weld formation, microstructure, and mechanical properties was studied in detail. It was found that the quality of weld appearance decreased with the increase of welding current, and there was a Zn island on the weld surface. The microstructure of the whole resistance spot welded joint was inhomogeneity. The nugget zone consisted of coarse lath martensite and a little of ferrite with the columnar crystal morphology, and the microstructure of weld nugget became coarser when the welding current was higher. There was an optimum welding current value and the tensile strength reached the maximum. This investigation will provide the process guidance for automobile body production.

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