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Single track formation in selective laser melting of metal powders

Single track formation in selective laser melting of metal powders

Authors :
Yadroitsev, I.
Gusarov, A.
Yadroitsava, I.
Smurov, I.
Source :
Journal of Materials Processing Technology. Sep2010, Vol. 210 Issue 12, p1624-1631. 8p.
Publication Year :
2010

Abstract

Abstract: Selective laser melting (SLM) is a powder-based additive manufacturing capable to produce parts layer-by-layer from a 3D CAD model. Currently there is a growing interest in industry for applying this technology for generating objects with high geometrical complexity. To introduce SLM process into industry for manufacturing real components, high mechanical properties of final product must be achieved. Properties of manufactured parts depend strongly on each single laser-melted track and each single layer. In this study, effects of the processing parameters such as scanning speed and laser power on single tracks formation are explored. Experiments are carried out at laser power densities (0.3–1.3)×106 W/cm2 by cw Yb-fiber laser. Optimal ratio between laser power and scanning speed (technological processing map) for 50μm layer thickness is determined for stainless steels (SS) grade 316L (−25μm) and 904L (−16μm), tool steel H13 (−25μm), copper alloy CuNi10 (−25μm) and superalloy Inconel 625 (−16μm) powders. A considerable negative correlation is found between the thermal conductivity of bulk material and the range of optimal scanning speed for the continuous single track sintering. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09240136
Volume :
210
Issue :
12
Database :
Academic Search Index
Journal :
Journal of Materials Processing Technology
Publication Type :
Academic Journal
Accession number :
51920880
Full Text :
https://doi.org/10.1016/j.jmatprotec.2010.05.010