Understanding the Mechanical Response of Friction Stir Welded …
61
Table 7
Predicted values and percent error for ultimate tensile strength (UTS), elongation and microhardness
Run order TV TWS
(mm/min)
TRS (rpm) UTS (MPa) Pred. UTS
(MPa)
Error (%) EL (%) Pred. EL (%) Error (%) MH
Pred. MH Error (%)
1
1
20
664
132.9
136.27
2.54
8.44
8.067
0.44
65.91
60.62
8.02
2
1
40
1216
120.03
114.41
4.68
8.42
8.714
3.47
94.45
99.52
5.36
3
2
20
664
135.31
136.75
1.06
9.04
9.288
2.75
72.94
74.81
2.57
4
2
40
1216
108.26
101.83
5.94
9.37
9.744
3.98
102.17 106.03
3.78
61
Table 7
Predicted values and percent error for ultimate tensile strength (UTS), elongation and microhardness
Run order TV TWS
(mm/min)
TRS (rpm) UTS (MPa) Pred. UTS
(MPa)
Error (%) EL (%) Pred. EL (%) Error (%) MH
Pred. MH Error (%)
1
1
20
664
132.9
136.27
2.54
8.44
8.067
0.44
65.91
60.62
8.02
2
1
40
1216
120.03
114.41
4.68
8.42
8.714
3.47
94.45
99.52
5.36
3
2
20
664
135.31
136.75
1.06
9.04
9.288
2.75
72.94
74.81
2.57
4
2
40
1216
108.26
101.83
5.94
9.37
9.744
3.98
102.17 106.03
3.78