[Retracted] Experimental Investigation and Optimization on Friction Stir Welding of Nylon 6A Using Taguchi and ANOVA with Microstructural Analysis

Table 1

Input process parameters.

Process parameters	Level 1	Level 2	Level 3
TRS (rpm)	500	1000	1500
Feed rate (mm/min)	30	40	50
Pitch (mm)	1	2	3