Nanoindentation Hardness Distribution and Strain Field and Fracture Evolution in Dissimilar Friction Stir-Welded AA 6061-AA 5A06 Aluminum Alloy Joints

Table 1

Chemical composition of AA 5A06, AA 6061, and the fracture surface of the welded specimen (wt.%).

	Si	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Al
AA 5A06	0.30∼0.40	0.40	0.05∼0.10	0.50∼0.80	5.80∼6.80	—	0.10∼0.20	0.02∼0.10	Bal.
AA 6061	0.40∼0.80	0.70	0.15∼0.40	0.15	0.80∼1.20	0.04∼0.35	0.25	0.15	Bal.
Fracture surface	0.79	0.70	0.35	0.08	1.46	0.17	0.08	0.21	96.16