A Study On The Influence Of Different Process Gases On Selectively Laser Melted Nickel-Chromium Powder By Means Of Process Monitoring: Melt Pool Geometries And Process By-Product Characteristics

Authors:

Tobias Deckers (Linde GmbH, Germany),
Thomas Ammann (Linde GmbH, Germany),
Kai Zissel (Linde GmbH, Germany),
Franz Wolf (Linde GmbH, Germany),
Gerd Witt (University Duisburg-Essen, Germany)

Abstract:

This paper aims to investigate the influence of the process gas atmosphere during the Powder Bed Fusion of Metals using a Laser Beam (PBF-LB|M) of a Nickel-Chromium alloy on the melt pool geometries of single laser tracks and on the discoloration of process by-products. The trials were performed on an EOS M290, which was equipped with a photodiode-based melt pool monitoring system (MPM). First results indicated differences in the intensity levels of the MPM signal and in the penetration depths. Furthermore, a correlation between the discoloration of the sampled powder material and the intensity level of the MPM signal was detected.

DOI:

https://doi.org/10.59499/WP225372132