About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Temperature gradient mechanism-based approach to reduce warpage in overhang regions using beam shaping in laser-based powder bed fusion of AlSi10Mg at high layer thickness |
| Author(s) |
David Zentgraf, Jonathan Utsch, Holger Merschroth |
| On-Site Speaker (Planned) |
David Zentgraf |
| Abstract Scope |
High layer thickness and beam shaping yield the potential to boost productivity in laser-based powder bed fusion of metals (PBF-LB/M). However, residual stresses present a major challenge limiting the application of additive manufacturing. In low-angle overhang regions residual stresses can cause in-situ displacement leading to dimensional deviations and even process termination due to recoater collision. The temperature gradient mechanism (TGM) is often used to explain the development of anisotropic residual stresses based on the high temperature gradients developing in the surroundings of the processing zone. This study investigates the influence of process parameters and scan direction on the dimensional deviations of overhang regions made of AlSi10Mg. Therefore, process parameters are analysed regarding laser return time, melt pool dimensions as influencing factors for temperature gradient and overhang deviation. The findings indicate that a suitable selection of process parameters and scan direction yield the potential to significantly reduce warpage in overhang regions. |
| Proceedings Inclusion? |
Undecided |