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

Figure 9

Obtained microstructural images with different welding parameters. (a) TRS: 500 rpm, and feed rate: 30 mm/min. (b) TRS: 500 rpm, and feed rate: 40 mm/min. (c) TRS: 500 rpm, and feed rate: 50 mm/min. (d) TRS: 1000 rpm, and feed rate: 30 mm/min. (e) TRS: 1000 rpm, and feed rate: 40 mm/min. (f) TRS: 1000 rpm, and feed rate: 50 mm/min. (g) TRS: 1500 rpm, and feed rate: 30 mm/min. (h) TRS: 1500 rpm, and feed rate: 40 mm/min. (i) TRS: 1500 rpm, and feed rate: 50 mm/min.

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