Parametric Optimization of Laser Additive Manufacturing of Inconel 625 Using Taguchi Method and Grey Relational Analysis

Table 2

Factors and levels used in Taguchi design.

Fixed factors	Value	Unit	Control factors	Symbol	Level			Unit
					1	2	3
Standoff distance	17	mm	Laser power	LP	1600	1800	2000	W
Laser spot diameter	3	mm	Scanning speed	SS	4	6	8	mm/s
Carrier gas flow rate	450	ml/h	Powder feed rate	PFR	10	20	30	g/min
Shielding gas flow rate	300	ml/min	Overlapping rate	OR	30	35	40	%