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Spot welding

About: Spot welding is a research topic. Over the lifetime, 12491 publications have been published within this topic receiving 89845 citations. The topic is also known as: Spot_welding.


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Journal Article
TL;DR: In this article, the authors examined the effects of fusion zone size on failure modes, static strength, and energy absorption of aluminum spot welded samples using a combined experimental, statistical, and analytical approach.
Abstract: This paper examines the effects of fusion zone size on failure modes, static strength, and energy absorption of aluminum spot welded samples using a combined experimental, statistical, and analytical approach. The main failure modes for aluminum spot welds are nugget pullout and interfacial fracture. First, static strength tests using coupon configurations of lap shear, cross tension, and coach peel were performed on the joint populations with a controlled fusion zone size. Thirty replicate static strength tests were performed for each coupon configuration. The resulting peak load and energy absorption levels associated with each failure mode were studied using statistical models. Next, an analytical model was developed to determine the failure mode of an aluminum resistance spot weld based on limit load analyses. It was found that fusion zone size, sheet thickness, and the level and location of weld porosity/defects are the main factors influencing the cross-tension failure mode of an aluminum spot weld. Two additional spot weld populations with different fusion zone sizes were then fabricated to validate the analytical failure mode model. Static cross-tension tests were again performed, and the experimental observations confirmed the analytically predicted failure modes for each population.

41 citations

Journal ArticleDOI
Yongbing Li1, ZeYu Wei1, YaTing Li1, Qi Shen1, Zhongqin Lin1 
TL;DR: In this paper, a multi-physics finite element model, which considered the coupling of electric field, magnetic field, fluid flow and heat transfer, was used to study the effect of the cone angle variation on resistance spot welding.

41 citations

Journal ArticleDOI
TL;DR: In this article, the effect of Mg in Al-Mg alloy on the strength and the interfacial microstructure of the joint was investigated, and the insert metal of commercially pure aluminum, which was put into the bonding interface, on the joint strength was examined.
Abstract: We tried to join steel to Al-Mg alloy using a resistance spot welding method. The effect of Mg in Al-Mg alloy on the strength and the interfacial microstructure of the joint was investigated. Additionally, the effect of insert metal of commercially pure aluminum, which was put into the bonding interface, on the joint strength was examined. The obtained results were as follows. The cross-tensile strength of a joint between SS400 steel and commercially pure aluminum (SS400/Al) was high and fracture occurred in the aluminum base metal. However, the strength of a joint between SS400 and Al-Mg alloy was remarkably low and less than 30% of that of the SS400/Al joint. An intermetallic compound layer developed so thickly at the bonded interface of the SS400/Al-Mg alloy joint that the joint strength decreased. The intermetallic compound layer developed more thickly as Mg content in the Al-Mg alloy increased. Using insert metal of commercially pure aluminum containing little Mg successfully improved the strength of the SS400/Al-Mg alloy joint and the strength was equivalent to that of the base metal.

41 citations

Journal ArticleDOI
TL;DR: In this article, a parametric study using some process parameters such as vibration amplitude and welding time was conducted using lateral-drive USW machine operating in time control mode, and the weld quality of USWed joint was analyzed based on the weld strength obtained by lap-shear tests and the fracture pattern subsequently characterized.

40 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023208
2022415
2021355
2020620
2019739
2018744