Topic
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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TL;DR: In this paper, a phenomenological material model has been proposed to simulate the ultrasonic welding of metals by taking into account these effects (surface and volume) and the thermal softening due to friction and ultrasonic (acoustic) softening has been included in the proposed material model.
Abstract: Ultrasonic welding (consolidation) process is a rapid manufacturing process that is used to join thin layers of metal at low temperature and low energy consumption. Experimental results have shown that ultrasonic welding is a combination of both surface (friction) and volume (plasticity) softening effects. In the presented work, an attempt has been made to simulate the ultrasonic welding of metals by taking into account these effects (surface and volume). A phenomenological material model has been proposed, which incorporates these two effects (i.e., surface and volume). The thermal softening due to friction and ultrasonic (acoustic) softening has been included in the proposed material model. For surface effects, a friction law with variable coefficient of friction that is dependent on contact pressure, slip, temperature, and number of cycles has been derived from experimental friction tests. The results of the thermomechanical analyses of ultrasonic welding of aluminum alloy have been presented. The goal of this work is to study the effects of ultrasonic welding process parameters, such as applied load, amplitude of ultrasonic oscillation, and velocity of welding sonotrode on the friction work at the weld interface. The change in the friction work at the weld interface has been explained on the basis of softening (thermal and acoustic) of the specimen during the ultrasonic welding process. In the end, a comparison between experimental and simulated results has been presented, showing a good agreement.
59 citations
TL;DR: In this article, solid-state ultrasonic spot welding (USW) was used to join Al alloy 6111-T4 to galvanized high-strength low-alloy (HSLA) steel at different welding energy levels.
59 citations
TL;DR: In this article, the weldability of AA 5083-H111 and AA 6082-T6 alloys, which are widely used in welding fabrication, is compared by analysing the welds obtained from both materials under a large range of welding conditions (varying tool dimensions, rotation and traverse speeds, axial loads and tilt angles) chosen to ensure high welding speeds.
Abstract: In this paper, the weldability of AA 5083-H111 (non-heat treatable) and AA 6082-T6 (heat treatable) aluminium alloys, which are widely used in welding fabrication, is compared by analysing the welds obtained from both materials under a large range of welding conditions (varying tool dimensions, rotation and traverse speeds, axial loads and tilt angles) chosen to ensure high welding speeds. The differences in friction stir weldability, assessed by weld defect analysis and weld strength characterisation, will be related to the markedly different plastic behaviours of both base materials. Based on the experimental results, a methodology for determining suitable friction stir welding parameters is proposed.
59 citations
TL;DR: In this article, the role of zinc coating in welding nugget development was investigated for three thickness joints of both uncoated low carbon and hot dip zinc (GI) coated steels.
59 citations
TL;DR: In this article, a method is proposed to determine energy losses occurring in the system of colliding plates, based on laminated models, and makes it possible to determine a quantitative relation between energy losses on the jet, on the one hand, and the kinematic parameters of explosive welding, in the other hand, it is shown that the efficiency varies from 0.5 to 3%, depending on the welding regime.
59 citations