Analysis of the Shielding Gas Dependent L-PBF Process Stability by Means of Schlieren and Shadowgraph Techniques

dc.creatorHoppe, B.
dc.creatorEnk, S.
dc.creatorSchleifenbaum, J.H.
dc.date.accessioned2021-11-18T18:23:23Z
dc.date.available2021-11-18T18:23:23Z
dc.date.issued2019
dc.description.abstractEnsuring a robust and reproducible Laser Powder Bed Fusion (L-PBF) process depends on the design of the shielding gas flow in the corresponding manufacturing system. The gas flow assures the removal of particles from the process zone that emerge from the interaction with the laser irradiation. Minor disturbances may influence the stability of the L-PBF-Process and cause defects in final parts produced. The objective of this work comprises visualizing the convection processes and particle dynamics to analyze their influence on process stability. Therefore, a high speed camera based Schlieren and Shadowgraph setup is used to visualize convection flows as well as trajectories of metallic condensate and particles with up to 10,568 fps. This arrangement allowed investigating the influence of shielding gas flow conditions on single melt tracks. Corresponding results and studies on the interaction between laser irradiation and particles in varying shielding gas flow conditions are contents of this work.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/90456
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/17377
dc.language.isoengen_US
dc.publisherUniversity of Texas at Austinen_US
dc.relation.ispartof2019 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectlaser powder bed fusionen_US
dc.subjectschlierenen_US
dc.subjectshadowgraphen_US
dc.subjectprocess developmenten_US
dc.subjectshielding gas flowen_US
dc.subjectprocess stabilityen_US
dc.subject316L stainless steelen_US
dc.titleAnalysis of the Shielding Gas Dependent L-PBF Process Stability by Means of Schlieren and Shadowgraph Techniquesen_US
dc.typeConference paperen_US

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