Table 2.

Sample identification, strengthening mechanism, and welding parameters.

Sample	Strengthening Mechanism	Welding Current [A]	Welding Voltage [V]	Welding Speed [mm/s]
No. 1	HT	50	10	0.82
No. 2	RS			1.34
No. 3	HT	70	13	1.44
No. 4	RS			1.80