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Electric resistance welding

About: Electric resistance welding is a research topic. Over the lifetime, 16761 publications have been published within this topic receiving 154851 citations.


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Patent
19 Oct 1999
TL;DR: In this paper, a tab attachment for a thin metal layer consisting of a metal layer, a metal tab, and a wire and the wire is bonded to the thin metal and the metal tab is attached to the wire.
Abstract: The difficulties encountered with attaching tabs to very thin metal layer. e. g., a layer of gold from 0.3 μm to 50 μm thick are severe. Typically, in the uses envisioned for the thin metal layer, which is for a compact battery, a plastic sheet such as polyimide underlies the thin metal layer. Polyimide has a relatively low melting point. The thin polyimide substrate melts when resistance welding is used. Ultrasonic welding doesn't work because the sound wave energy is absorbed by the polyimide. This invention solves the attachment problem by using wire bonding to the thin metal sheet and to its tab. The tab attachment for a thin metal layer comprises a thin metal layer, a metal tab, and a wire and the wire is bonded to the thin metal layer and the wire is bonded to the metal tab. The thin metal layer may be gold; the thickness of the gold is between 0.3 μm and 50.0 μm.

40 citations

Journal ArticleDOI
TL;DR: In this article, a new generation of high power fiber laser was used and it was coupled with a TIG arc source for hybrid welding and two separate sets of experimental trials were performed.

40 citations

Journal ArticleDOI
TL;DR: In this article, an attempt has been made to study the effect of FSW process parameters on the tensile strength of A319 alloy welded joints, which were made using different combinations of tool rotation speed, welding speed, and axial force, each at four levels.
Abstract: Fusion welding of cast A319 (Al-Si-Cu) alloy will lead to many problems including porosity, micro-fissuring, and hot cracking. Friction Stir Welding (FSW) can be used to weld A319 alloy without these defects. In this investigation, an attempt has been made to study the effect of FSW process parameters on the tensile strength of A319 alloy welded joints. Joints were made using different combinations of tool rotation speed, welding speed, and axial force, each at four levels. The quality of weld zone was analyzed using macrostructure and microstructure analysis. Tensile strength of the joints were evaluated and correlated with the weld zone microstructure. The joint fabricated with a 1200 rpm tool rotation speed, 40 mm/min welding speed, and 4 kN axial force showed superior tensile strength compared with the other joints.

40 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of EMF on resistance spot welding of high strength steel DP780 was investigated using an external magnetic field (EMF) produced by a pair of permanent magnets, and the results showed that under the same welding current, the EMF could refine the crystal grains, increase the weld nugget diameter and reduce the risk of shrinkage cavities.
Abstract: Electromagnetic stirring method has been used in casting and arc welding processes to refine crystal grains. In this paper, the authors describe an experiment where an external magnetic field (EMF) produced by a pair of permanent magnets was used to study the effect of electromagnetic stirring on resistance spot welding of advanced high strength steel DP780. Experimental results show that under the same welding current, the EMF could refine the crystal grains, increase the weld nugget diameter, reduce the risk of shrinkage cavities and significantly improve the joint’s tensile–shear strength and ductility. However, when the welds with and without the EMF were compared under the same weld diameter, because of the greatly reduced nugget thickness, the tensile–shear strength of the weld made under the EMF is a little bit lower than the normal weld.

40 citations

Journal Article
TL;DR: In this article, an experimental study was conducted to determine effects of welding parameters and to optimize those parameters that have the most influence on eliminating or reducing the extent of hard zone formation at dissimilar metal welds (DMWs).
Abstract: An experimental study was conducted to determine effects of welding parameters and to optimize those parameters that have the most influence on eliminating or reducing the extent of hard zone formation at dissimilar metal welds (DMWs). Preheat, base metal thickness and welding electrode composition were found to have the most influence. Maintaining an optimum preheat for a given base metal thickness and controlling the maximum interpass temperature throughout welding resulted in drastic reduction and often complete elimination of hard zones at DMWs fabricated with ENiCrFe-3 electrodes, but not those welds fabricated with E309 stainless steel electrodes. This finding indicates that depending on the cooling rate and composition of the welding electrode, hard zones in DMWs can be eliminated. The cooling rate must be slow enough to avert formation of hard allotropic structures (i.e., martensite) and fast enough to avoid precipitation of hard intermetallic phases. The optimum welding electrode composition is one that will retard formation and precipitation of intermetallic phases during welding while the preheat needed to prevent the formation of allotropics is being maintained. Unfortunately, this unique characteristic is not available in most, if not all, austenitic stainless steel electrodes; nickel-based welding electrodes have been demonstrated to be more receptive.

40 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023106
2022247
202168
2020162
2019184
2018245