Friction stir lap welding (FSLW) between SPC270 steel sheet and A6061 aluminum alloy were investigated with the effect of tilt angle plunge depth tool. Tilt 3 degree improved material flow suppressed generation defect in weld. The weld strength increased tool achieved maximum value 212 MPa at 0.15 mm depth. From TEM observation, uniform reaction layer 450 nm was formed on interface. On interfac...

A new model-based approach for ultrasonic phased-array testing of dissimilar welds based on the direct measurement of the wave speeds inside the real weld by using scanning laser vibrometry is presented. With this technique the interaction of different wave modes with the weld can be studied in detail leading to important consequences for the measuring set-up. Together with the geometry of the ...

The dissimilar butt welding of nickel 201 and AISI 316 was studied by utilising a 4 kW CO2 laser with the help Response Surface Methodology (RSM). effects power are 2580–3420 W; speed 450–1150 mm/s; focal position –1 to 0 mm; beam angle 84–96 degrees; offset 0–0.2 mm on weld geometry, i.e., depth penetration, bead width, Fusion Zone Area (FZ). required profile responses for were modeled mathema...

With the gradual evolution of metal additive manufacturing (AM) as a viable option for realizing complex parts, research focus has shifted from mere geometric realization to higher material deposition rate without significant loss accuracy. This work aims demonstrate potential traverse twin-wire welding produce asymmetric weld beads, providing an extra control factor in bead shape and component...

Activated tungsten inert gas welding (ATIG) is a new approach to Tungsten Inert Gas (TIG) that has the potential improve weld penetration. This paper investigates effect of micro and nanoparticle size oxide flux during TIG Hastelloy C-22. The SiO<sub>2</sub> Al<sub>2</sub>O<sub>3</sub> fluxes in terms particle thermal stability on surface appearance, bead geo...

In the frame of circular economy, welding Ni-based superalloys has gained increasing importance when applied, for instance, to repairing highly expensive components widely used in strategical sectors, such as defense and aerospace industries. However, correct process parameters avoiding metallurgical defects premature failures need be known. To reach this goal, Inconel 625 butt-welded joints we...

Wire arc additive manufacturing (WAAM) is advantageous for fabricating large-scale metallic components; however, a high geometric accuracy as that of other AM techniques cannot be achieved because the deposition process with large layer. This study focuses on WAAM based gas metal welding (GMAW). To clarify influence shielding used to protect molten during fabrication built part obtained via GMA...