767260.fig.006a
767260.fig.006b
767260.fig.006c
767260.fig.006d
767260.fig.006e
Figure 6: OM micrographs of T-joint (welding parameter:  KW, υ = 4 m/min). (a) Macrographs of the weld seam; (b) high magnification of spot A; (c) high magnification of spot B, (d) high magnification of spot C, and (e) High magnification of spot D.