Process Monitoring in Metal Additive Manufacturing: Co-axial Multispectral Imaging

Institut

Professur für Laserbasierte Additive Fertigung

Typ

Bachelorarbeit / Semesterarbeit / Masterarbeit /

Inhalt

experimentell / theoretisch / konstruktiv /  

Beschreibung

Initial situation

The Professorship for Laser-based Additive Manufacturing is researching innovative concepts in Laser-based Powder Bed Fusion of Metals (PBF-LB/M), an additive manufacturing process that creates components by successively melting metal powders in layers with a laser.

PBF-LB/M offers the potential to produce zero-defect, cost-effective complex metal parts. However, the intricate thermal histories during laser-metal interactions can lead to problematic areas and abnormal microstructures. As a thermally driven process, acquiring accurate temperature distribution data in the laser-material interaction zone is crucial. Here, Multispectral Imaging (MSI) comes into play, which captures various wavelengths of emitted light from the melting pool. After developing the algorithm and investigating the laser-material interaction on a bare plate, we are now transferring the method to the actual PBF-LB/M process with a co-axial monitoring system.

Aim and content of the work

This thesis predominantly focuses on measuring and analyzing the melt pool in the PBF-LB/M process using MSI. This endeavour will involve devising a conceptual framework and experimental methodology to acquire and understand the melt pool, with the incorporation of a self-developed temperature calculation algorithm. The aspiration is to attain a deep-seated understanding of the melt pool by aligning insights derived from MSI.

The following work packages (WP) form the content of the thesis:

WP1: Literature review of AM process monitoring and parameter study.

WP2: Augment and refine the existing measurement system to enhance its capability.

WP3: Execute experiments, delivering in-depth insights into the melt pool.

WP4: Validate the results through experiments and the previous off-axial data.

WP5: Isolate and analyze features and dynamics inherent to the melt pool to ascertain their implications and manifestations.

WP6: Discussion and documentation.

Voraussetzungen

Requirements / Application documents
- An Interest in the physics governing laser-metal interactions and AM.

- Communication and problem solving abilities.

- A keen inclination towards experimental design and an analytical approach to research.

- A willingness to spearhead AM experiments.

Please send your application with your CV, a brief motivation letter and a current transcript of grades to:

Contact
Ruihang Dai, M.Sc.
ruihang.daitum.de

Möglicher Beginn

sofort

Kontakt

Ruihang Dai
Raum: 5501.02.134
ruihang.daitum.de

Ausschreibung