Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

Marius Gipperich; Christian Peters; Jan Riepe; Robin Day; Thomas Bergs

doi:10.1117/12.2576112

5 March 2021 Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

Marius Gipperich, Christian Peters, Jan Riepe, Robin Day, Thomas Bergs

Proceedings Volume 11677, Laser 3D Manufacturing VIII; 116770R (2021) https://doi.org/10.1117/12.2576112
Event: SPIE LASE, 2021, Online Only

Abstract

Laser Metal Deposition (LMD) is a high deposition rate metal Additive Manufacturing process. Its applications are basically repair, cladding and manufacturing. The two most commonly used LMD processes are powder-based (LMD-p) and wire-based (LMD-w). Despite the fact that wire-based LMD is more material efficient, process stability is a major concern. By adding a modulated laser beam to the continuous process beam, a change of the melt pool geometry and increased energy absorption are observed. This relation shows great potential to increase process stability. In this contribution, the positive effect of the dual laser-beam use on LMD-w processes is demonstrated. To understand the cause-effect relation, the workpiece temperature field was investigated by optical backscatter reflectometry (OBR). The results were then correlated to simultaneously performed IR camera measurements of the workpiece’s upper surface. By better understanding the thermal phenomena in dual-beam LMD, research can improve process temperature control. This leads to a new perspective for the LMD-w manufacturing process in many industry sectors such as mobility, energy and engineering.

Conference Presentation

Citation Download Citation

Marius Gipperich, Christian Peters, Jan Riepe, Robin Day, and Thomas Bergs "Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition", Proc. SPIE 11677, Laser 3D Manufacturing VIII, 116770R (5 March 2021); https://doi.org/10.1117/12.2576112

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