Microstructure Evolution and Tensile Behavior of Dissimilar Friction Stir-Welded Pure Copper and Dual-Phase Brass

Optimization of parameters and formulation of numerical model employing GRA–PCA and RSM approach for friction stir welded Ti–6Al–4V alloy joints

“…From the SEM images illustrated in the figures 6(a) and (e), i.e., SEM images of the parent metal and nugget zone of the flaw free Ti alloy joint attained during experiment no.20, it can be inferred that the large sized lengthened primary alpha (α) grains and altered beta (β) grains of the parent metal being scattered in an uneven manner have been transformed into finely refined, homogeneous uniformly distributed lamellar α and prior β grains. This was attained due to the generation of frictional heat in ideal volumes and perfect stirring action caused by the employment of the taper cylindrical pin tool geometry and its shoulder [11,34]. These finely refined grains distributed in a uniform manner in the nugget zone have in turn contributed for the fabrication of flaw free Ti alloy joints [22,28].…”

“…Even though several researchers [11][12][13][14][15] have focused their experimental works on FSW towards optimizing the process parameters. For instance, Senthil et al [12] in his experimental investiagtion devised a RSM based numerical model involving desirability approach for optimizing the two important parameters of FSW process, namely tool traverse speed and rotational speed during the joining of Al alloy.…”

Effects of Tool Rotation Speed and Pin Geometry on Properties in Friction Stir Welding of Brass

“…FSW has mainly used to welding of aluminum (Al) [9][10][11] in addition to magnesium (Mg) [12,13], titanium [14], steel [15], composite [16], polymer [17], and Cu [2,3,[18][19][20][21][22][23][24][25] since invented in 1991 by The Welding Institute. Recently, FSW has been also successfully carried out for bimetal applications such as Al/stainless steel [26], Al/Mg [27], Al/Cu [28] and Cu/CuZn [29,30] under different FSW parameters. These studies show that FSW parameters in the trials have to be properly chosen in order to a sound and defect-free weld achievement.…”