Open Access

Table 1.

Assignment of levels to control factors.

Level 1
Level 2
Level 3
%CNT added (%wt.) 0% 2.5% 5%
Control factors Machining on time (sec) 3 4 5
Discharge current (A) 2 4 6
Voltage (V) 50 60 70
Total depth of cut (mm) 0.5 0.75 1

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