Effect of External Constant Magnetic Field on Weld Nugget of Resistance Spot Welded Dual-Phase Steel DP590

Influencing mechanism of an external magnetic field on fluid flow, heat transfer and microstructure in aluminum resistance spot welding

“…Under the effect of the combined flow in MA-RSW, the temperature gradient inside the nugget decreases significantly, and the maximum temperature drops from 774°C for RSW to 725°C. (4) The increase rate of the nugget diameter is mainly in the range of 6% ∼ 15% in steels MA-RSW as reported by Shen et al (2011) and Qi et al (2020).…”

“…To improve the weld quality in a energy-efficient method, magnetically assisted resistance spot welding (MA-RSW) technology was proposed by Shen et al (2011). Experimental studies on dual-phase steel (Qi et al, 2020), stainless steel (Li et al, 2018), aluminum CONTACT Yongbing Li yongbinglee@sjtu.edu.cn alloy (Huang et al, 2020), magnesium alloy (Yao et al, 2014) and Al/Ti dissimilar materials (Li et al, 2015) have shown that an external magnetic field (EMF) can enlarge the nugget size, reduce the shrinkage defects, and improve the mechanical performance of weld joints.…”

Recent developments in the design, development, and analysis of the influence of external magnetic-field on gas-metal arc welding of non-ferrous alloys: review on optimization of arc-structure to enhance the morphology, and mechanical properties of welded joints for automotive applications

“…Shen et al. [ 35 ] examined the influence of additional fixed “magnetic-field” on weld size in spot weld of steel. It established the increased size of the nugget and better surface features, grain shape, and mechanical characteristics.…”

Impact of electromagnetic stirring upon weld quality of Al/Ti dissimilar materials resistance spot welding

“…Watanabe et al have proposed that the weld nugget of a spot-welded 301-type stainless steel became larger with an increasing magnetic field applied perpendicular to the welding direction [7]. Shen et al have found that EMS could refine the grain structure, increase the weld nugget diameter, reduce the risk of shrinkage cavities, and improve the mechanical properties of the joint in RSW of advanced high-strength steel DP590 [8] and DP780 [9,10]. Li et al have studied the effect of EMS upon the nugget formation of DP980 steel and they found that, under the action of EMS, the nugget symmetry improved and the macrocrystallization direction in the fusion became less obvious [11].…”