Effect of the Preheating Temperature on Process Time in Friction Stir Welding of Al 6061-T6

Table 1

Calculated parameters for the proposed model.

𝐴	𝐵	𝐶	𝜂	𝜔 (rpm)	𝑃 (MPa)	𝑣 (mm/min)
30	2.944	0.0012	0.3	920	50	20