Experimental and numerical thermal analysis of the laser powder bed fusion process using in situ temperature measurements of geometric primitives

Materials & Design

Maximilian Schoeler¹  Stefan Kleszczynski²  Norman Schnell²  Gerd Witt² 

[1] Corresponding author.;Chair of Manufacturing Technology, Institute for Product Engineering, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany;

关键词: Additive manufacturing;    PBF-LB/M;    In situ thermocouple;    Thermal history;    Validation;    FEM-simulation;   

DOI  :  

来源: DOAJ

【 摘 要 】

Laser powder bed fusion (PBF-LB/M) is a potent technology for manufacturing demanding geometries using innovative materials. The complex thermal conditions during the process are nontrivial to describe and have a significant impact on final material properties. Therefore, these conditions are analyzed using an experimental setup based on thermocouples embedded into the substrate plate close to the substrate-part interface of the respective sample. The in situ data allows for an in-depth investigation of correlations between core process parameters (laser power, scan velocity, exposed area) and the temperature progression at the base of the part. The alternative view on the conditions during the process enables a novel analytical description of the thermal history. Additionally, a macroscopic FEM-model is presented. It is calibrated and validated through the empirical data of geometric primitives to emphasize the added value of the setup as a calibration tool for thermal simulations.

【 授权许可】

Unknown