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Table 2

Test parameters of response surface model.

No. The spinning temperature x1 (°C) Friction coefficient x2 Main spindle speed x3 (r/min) Maximum stress y1 (MPa) Maximum thickness increment y2 (mm)
1 1150 0.20 250 290.6 4.6
2 1050 0.30 250 271.6 5.1
3 1150 0.30 200 274.2 4.2
4 1050 0.20 150 282.8 4.5
5 1050 0.20 200 282.8 4.5
6 950 0.20 150 317.7 5.4
7 1050 0.10 250 304.2 4.0
8 950 0.20 250 321.3 5.5
9 950 0.30 200 308.7 6.0
10 950 0.10 200 333.4 5.1

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