Mechanical and Formability Evaluation of ST14 Alloys Welded by Friction Stir Welding

Table 3

Welded parameters for microhardness test (a) to (d).

Description	Shoulder diameter (mm)	Pin diameter (mm)	Linear motion speed (mm/min)	Rotation speed (rpm)	Sample
More inlet heat	14.2	3.9	50	1000	A
Less input heat	14.2	3.9	100	500	B
Welding with acceptable parameters	14.2	3.9	100	1000	C
Welding with optimal parameters	14.2	3.9	80	800	D