Abstract
The proposed model is a numerical tool for designing processing windows suitable to metal alloy. The model is validated fitting experimental measures of track width, depth and cross sectional area from three literature sources. Effective liquid pool thermal conductivity laser absorptivity and depth of application of laser energy are here considered as fitting parameters. Laser absorptivity and depth of application of laser energy result to rise almost linearly with increasing specific energy.. The obtained results give confidence about the possibility of using the model as a predicting tool after further calibration on a wider range of metal alloys.
Highlights
Laser Powder Bed Fusion (L-PBF) is one of the most adopted and successful powder bed fusion-based additive manufacturing technologies for many types of alloys including stainless steels and light alloys [1,2,3,4,5,6]
The main problematic coming from the Laser Powder Bed Fusion (L-PBF) technique is the achievement of a fully dense part out of the interconnected tracks
The correct choice of process parameters is of fundamental importance to obtain a porosity free component
Summary
Laser Powder Bed Fusion (L-PBF) is one of the most adopted and successful powder bed fusion-based additive manufacturing technologies for many types of alloys including stainless steels and light alloys [1,2,3,4,5,6]. The proposed model is a simplified numerical tool for designing processing windows suitable for metal alloys of any composition. The model is validated fitting experimental measures of track width, depth and cross-sectional area taken from three literature sources, referring to Ti6Al4V, Inconel 625 and Al7050.
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