Research Article
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 | % |
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