The present study was carried out to evaluate how the friction stir spot welding (FSSW) process parameters affect the temperature distribution in the welding region, the welding forces and the mechanical properties of the joints. The experimental study was performed by means of a CNC machine tool obtaining FSSW lap joints on AA7050 aluminum alloy plates. Three thermocouples were inserted into t...

To satisfy the need of polymer connection in lightweight automobiles, a study on laser transmission spot welding using polymethyl methacrylate (PMMA) is conducted by using an Nd:YAG pulse laser. The influence of three variables, namely peak voltages, defocusing distances and the welding type (type I (pulse frequency and the duration is 25 Hz, 0.6 s) and type II (pulse frequency and the duration...

Mathematical models and associated numerical techniques have been developed to investigate the complicated transport phenomena in spot hybrid laser-MIG keyhole welding. A continuum formulation is used to handle solid phase, liquid phase, and the mushy zone during the melting and solidification processes. The volume of fluid (VOF) method is employed to handle free surfaces, and the enthalpy meth...

Friction stir spot welding is an emerging spot-welding technology that offers opportunities for joining a wide range of materials with minimum energy consumption. To increase productivity, the present work addresses production challenges and aims to find solutions lap-welding multiple ultrathin sheets maximum productivity. Two convex tools different edge radii were used weld four AA5754-H111 al...

This study investigates transport phenomena in the weld pool (WP) of gas tungsten arc (GTA) welding of Nickel to 304 stainless steel. A finite element 3D simulation of fluid flow and heat transfer of spot welding without consumable is accomplished which leads to prediction of the weld zone shape, weld penetration and dilution of alloying elements. The model includes magneto-hydrodynamics (MHD),...

The laser-spot welding process of aluminum alloy 1050A with a limited thickness is observed the x-ray phase contrast method to investigate melt dynamic especially when penetrates material. investigated two different wavelengths laser beam source: 515 and 1030 nm influence absorptivity. progressively material during spot-welding until reaching bottom side lower material, so-called “lens-like” ap...

Spot welding is a method of electrical resistance in which two or more metal sheets are clamped between electrodes and at the same time an electric current applied so that surface material reaches temperature then fused. The purpose study was to determine tensile strength 5083 aluminum plate connection spot process. This research carried out experimentally as for connected AA has thickness 1 mm...

Abstract The resistance spot welding (RSW) method was used to join aluminum alloy AA 1050 and copper UNS C50100 sheets. Mechanical properties of the joints were examined. influence process parameters on tensile shear force discussed. design experiments (DOE) analyze mechanical joints. Three RSW used: current, squeeze time, time. results showed that joint stress increased with increasing current...

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...