Advantages of the Green Solid State FSW over the Conventional GMAW Process

Table 1

Grain size at different welding zones for FSW and GMAW for Al-Al joints.

Items	Range of grain size in μm of the weld regions
	NZ/WZ	TMAZ	HAZ	BM
FSW
Rotational speed
1750 rpm	3.5–10	3–11	8–18	5–16
2720 rpm	2–8	3.5–13	8–19	5–16
GMAW	7–12	—	10–22	5–16