Mechanical Properties Optimization of Friction Stir Welded Lap Joints in Aluminium Alloy

Table 1

Table data for two factorial designs with five centre points.

Runs order	rpm	s/mm
1	1377.5	0.267
7	2222.5	0.267
6	1377.5	0.533
5	2222.5	0.533
2	1800.0	0.400
3	1800.0	0.400
4	1800.0	0.400
9	1800.0	0.400
8	1800.0	0.400