From: Refill Friction Stir Spot Welding Al Alloy to Copper via Pure Metallurgical Joining Mechanism
Location
A
B
C
D
E
F
G
Al
–
22.9
31.8
29.2
19.4
53.2
34.8
Cu
100.0
77.1
68.2
70.8
80.6
46.8
65.2