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Tailored melt pool shape and temperature distribution by a dual laser beam LMD-w process

Presentation held at TCT Conference @ FORMNEXT Connect, 12th November 2020, virtual
 
: Gipperich, Marius; Riepe, Jan; Day, Robin; Bergs, Thomas

:
presentation urn:nbn:de:0011-n-6351885 (3.0 MByte PDF)
MD5 Fingerprint: e218a0f5d00bb8c50f1d7a5bed323c40
Created on: 27.5.2021


2020, 22 Folien
TCT Conference @ Formnext Connect <2020, Online>
Deutsche Forschungsgemeinschaft DFG
370349951
Grundlagenuntersuchungen zur Erweiterung des Verständnisses eines 2-Strahl-Laserprozesses für metallische Werkstoffe
English
Presentation, Electronic Publication
Fraunhofer IPT ()
laser metal deposition; LMD-W; dual beam; additive manufacturing; melt pool; temperature field

Abstract
Laser Metal Deposition (LMD) is a high deposition rate metal AM process used for repair, cladding or manufacturing. While wire-based LMD (LMD-w) offers several advantages such as high material efficiency and a safe and simple handling of the wire feedstock, advanced concepts are needed to increase the LMD-w process stability. In this presentation, an approach is investigated to stabilize the LMD-w process by combining a continuous wave (cw) laser and a low-power pulsed wave (pw) laser. Calorimeter-like absorption measurements as well as deposition experiments are carried out to understand the physical background of the dual laser process and how this setup helps to stabilize the process. Promising results were achieved showing the possibility to tailor the melt pool height and width by a factor of 1.5-2 and an increase of energy absorption by 20 %. This offers new perspectives for the LMD-w manufacturing process in many industry sectors.

: http://publica.fraunhofer.de/documents/N-635188.html