Predicting tensile strength of friction stir welded AA6061 aluminium alloy joints by a mathematical model

Effect of the Welding Speed on the Macrostructure, Microstructure and Mechanical Properties of AA6061-T6 Friction Stir Butt Welds

“…Indeed, the alteration of structure in the HAZ can be attributed to the induced heat at this region and the cooling rates after FSW. In this case, although some researchers reported a significant grains coarsening in HAZ [20,21,27], it has almost coarse grains but similar to the base metal in our study (Table 5). …”

“…Indeed, the alteration of structure in the HAZ can be attributed to the induced heat at this region and the cooling rates after FSW. In this case, although some researchers reported a significant grains coarsening in HAZ [20,21,27], it has almost coarse grains but similar to the base metal in our study (Table 5). In the NZ, microstructure morphology is identified by dynamically or continuously recrystallized fine equiaxed grains because of the severe deformation as shown in Figure 8, which is caused by the sufficient pin stirring action during welding process.…”

Experimental Study of Mechanical and Metallurgical Properties of Friction Stir Welded Dissimilar Aluminum Alloys

“…Effect of FSW process parameters on mechanical properties of welded AA6061 aluminum alloy. They were found that the tensile strength initially increased with the increase in tool rotation speed, welding speed and axial force, but tensile strength decreased after reaching a maximum value with the further increase of the these parameters [6]. Friction stir welding of very thin plates of the AA6016-T4 aluminum alloy, it was concluded that the difference in tool geometry and welding parameters included significance changes in the material flow path during welding as well as in the microstructure in the weld nugget [7].…”

Optimization of Hybrid Ultrasonic Frequency Pulsed VP-GTAW Process Parameters on Tensile Properties of AA 5456 Alloy

“…This vaporization loss may reduce the mechanical properties of welded joints by affecting the chemical compositions of molten pool [4][5][6]. In order to enhance the weld quality of Al-Mg alloys, metallurgical advantages of welds produced by high-frequency pulsed and magnetic arc oscillation methods are frequently investigated, including stirring effect on molten pool, refinement of grains, reduction of distortion, and control of segregation [7][8][9]. A novel hybrid ultrasonic frequency pulsed VP-GTAW (HPVP-GTAW) technique has been developed in which ultrasonic frequency pulsed current current is accurately superimposed in the positive polarity stage during VP-GTAW process.…”