Table 2.

The processing parameters used in this study.

Machining Parameters	Abbreviation	Levels
		1	2	3	4
Laser power (W)	P	11.5	18.5	25.5	32
Pulse frequency (MHz)	f	0.4	0.6	0.8	1
Scanning velocity (mm/s)	v	300	600	900	1200
Layer number	n	10	15	20	25
Element number	m	60	80	100	120