in this study, friction stir spot welding (fssw) is applied to join the tial6v4 titanium alloy with 1.5 mm thickness and then the effect of rotational speed and tool dwell time on microstructure and mechanical properties is investigated. in this regard, the speed of the tool rotation was considered as 800, 1000, and 1200 rpm, as well as the tool dwell time was set at 7 and 12s. microstructural ...

Abstract Aiming at alloys commonly used in terminals, this paper studies the method of improving characterization performance spot welding section from perspective controlling process parameters. Using control experiment, by current, energization time, electrode pressure, and using coolant during welding, surface structure image maximum tensile-shear force curve were obtained, so as to obtain o...

The distortion of laser welded titanium plates was assessed for different operating conditions of the laser welding device, and with different welding parameters (in terms of weld point and prewelding). In this study, Nd : YAG laser welding device was used to join the titanium plates. The results showed that distortion increased stepwise after each welding point along the welding zone (one-side...

Heating of the electrode at work–piece interface zone in spot welding, leading to degradation tip, becomes a significant concern high-volume production automotive industry. By recognizing interrelationship between hardness, wear resistance, and thermal conductivity, authors emphasize importance selecting materials with suitable alloying elements desirable for achieving optimal performance weldi...

In the present research, the effects of spot-welding process parameters on the nugget diameter and electrode penetration depth of spot-welded joints were investigated. To achieve this, a spot-welded joint of three-thin sheet low carbon steels (same thicknesses of 0.8 mm) was simulated as an electerical-thermal-mechanical coupling of 3D finite element model. After validating the finite element s...