Abstract
Selective laser melting (SLM) has been considered as a method for manufacturing large and
complex industrial parts. Considering that structural defects are generally caused by process
parameters, the optimal evaluation of parameter selection to minimize localized defects has been
of interest. Therefore, a model was presented to predict the optimal single-pass geometric
characteristics based on the main process parameters, namely laser power and scanning speed, to
prevent defects in single-pass Inconel 738LC on Inconel 738 casting substrate. An optimal
process map was obtained based on the use of linear regression method combined with genetic
optimization algorithm with optimal combination parameters (PαVβ). Finally, based on the
geometric characteristics of single-passes, an optimal region was identified on the process map.
At a power of 325 W and a laser scanning speed of 800 mm/s, due to the decrease in the G/R
ratio, the microstructure from the junction to the substrate to the top of the single pass has
changed from columnar to coaxial dendritic.
complex industrial parts. Considering that structural defects are generally caused by process
parameters, the optimal evaluation of parameter selection to minimize localized defects has been
of interest. Therefore, a model was presented to predict the optimal single-pass geometric
characteristics based on the main process parameters, namely laser power and scanning speed, to
prevent defects in single-pass Inconel 738LC on Inconel 738 casting substrate. An optimal
process map was obtained based on the use of linear regression method combined with genetic
optimization algorithm with optimal combination parameters (PαVβ). Finally, based on the
geometric characteristics of single-passes, an optimal region was identified on the process map.
At a power of 325 W and a laser scanning speed of 800 mm/s, due to the decrease in the G/R
ratio, the microstructure from the junction to the substrate to the top of the single pass has
changed from columnar to coaxial dendritic.
| Translated title of the contribution | Optimization of process map and prediction of singlepass properties of Inconel 738LC by selective laser melting method with regression and genetic algorithm |
|---|---|
| Original language | Persian (Iran, Islamic Republic of) |
| Pages (from-to) | 21-33 |
| Journal | Journal of Welding Science and Technology of Iran |
| Volume | 12 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2026 |
| Externally published | Yes |
Free Keywords
- Selective laser melting
- Inconel 738LC
- Linear regression
- Genetic algorithm
- Microstructure
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