This study focused on the optimization of Al—Mg to CuZn34 friction stir lap welding (FSLW) process for optimal combination of rotational and traverse speeds in order to yield favorable fracture load using Grey relational analysis (GRA). First, the degree of freedom was calculated for the system. Then, the experiments based on the target values and number of considered levels, corresponding orth...

The performance of laser welding of Ti and two dental precious alloys (Ag-Pd-Au, Au-Pt-Ag) was investigated by mechanical testing and microscopic observation, using butt joint as design. The laser irradiation was done using a commercial Nd:YAG dental laser-welding device in a single pulse mode with output currents 150, 200, 250, 300A, spot diameters 0.6, 0.9, 1.2mm, and pulse duration 10ms. The...

Friction stir welding (FSW) is a recently developed solid-state joining process that uses a specially shaped rotating tool to produce lap or butt joints. At the National Research Council, an inter-institute collaboration was started in 2007 with the goal of exploiting the NDE expertise and applying it for the characterization of friction stir welds for various industrial applications. In partic...

Dissimilar Ti–Al laser weldings are very interesting due to their difficulties in being processed because of the different physical properties alloys and crack formations during cooling solidification. In this study, effect offset defocusing on microstructure, geometry mechanical response 2 mm thick dissimilar AA6061/Ti-6Al-4V welds was analyzed. Moreover, order reduce residual stresses, joints...

Mechanical properties of dissimilar weld joints between GOST09ch16N4B (a martensitic stainless steel) and AISI 4130 thin sheets made by gas tungsten arc welding (GTAW) were studied using ER410NiMo and ER100S-G filler metals in post weld heat treated conditions. Heat treatment cycles consisted of austenitization at 900, 950 and 1000 °C for 1 h and this was followed by oil cooling and tempering a...

Refill Friction Stir Spot Welding (refill FSSW) is a method for joining similar and dissimilar lightweight metallic materials or thermoplastic polymers. The technique produces welds that feature suitable mechanical properties with advantages such as the possibility of industrial scalability automation. Still, some challenges need to be overcome in order increase adoption this industry. Tool wea...

This study presents new findings on the underlying failure mechanism of thick dissimilar electron-beam (EB) welds through a AA 2219-AA 5083 pair. Contrary to prior studies EB welding thin Al alloys, where liquation in grain boundaries (GBs) partially melted zone (PMZ) was not observed, present investigation for reports both and increased segregation Cu PMZ. The work is thus directed towards und...