Unstable Temperature Distribution in Friction Stir Welding

Table 1

Chemical composition of alloy elements in the 6061-T6 plates.

Chemical composition (wt%)										Ultimate tensile strength (MPa)
Mg	Si	Mn	Cu	Fe	Cr	Zn	Ti	Other	Al
1.06	0.67	0.014	0.23	0.32	0.21	0.007	0.02	0.05	Bal	312 ± 10