Speaker
Description
The micro- and nanostructure of additively manufactured alloys designed for certain applications are influenced by atomic-level effects arising from either added or randomly inserted impurities.
While the addition of elements in very low concentrations is required for the tuning towards a specific microstructure, different production routes of the feedstock and the printed parts as well as process parameters or post-processing are responsible for the undesired elements. Oxygen, for example, is responsible for nano- or micrometer sized pores formation, amorphous phases or delamination from a given support material but can also shifts the allover microstructure inducing formation of metastable new phases, thus dramatically influencing the expected process-property-relationship.
This paper presents advanced microscopy studies supplemented by analytical characterization methods performed on 3D-printed metallic parts [1,2,3]. The focus lies on the detection of light elements and their influence on microstructural evolution during printing and post-processing, with emphasis on heat treatment.
This work received financial support by the Austrian Science Fund (FFG): SP-2021-04 (INSIGHT) and from the European Union’s Horizon 2020 research and innovation program under grant agreement No 823717 – ESTEEM3.
[1] Albu, M.; Krisper, R.; Lammer, J.; Kothleitner, G.; Fiocchi, J.; Bassani, P.: Microstructure evolution during in-situ heating of AlSi10Mg alloy powders and additive manufactured parts, Add. Manuf. 36 (2020), 101605. https://doi.org/10.1016/j.addma.2020.101605
[2] Albu, M.; Panzirsch, B.; Schröttner, H.; Mitsche, S.; Reichman, K.; Poletti, M.C.; Kothleitner, G.: High-Resolution Microstructure Characterization of Additively Manufactured X5CrNiCuNb17-4 Maraging Steel during Ex and In Situ Thermal Treatment, Materials 14 (2021), 7784. https://doi.org/10.3390/ma14247784
[3] Biffi, C.A.; Bassani, P.; Fiocchi,J.; Albu, M.; Tuissi, A.: Selective laser melting of AlCu-TiB2 alloy using pulsed wave laser emission mode: processability, microstructure and mechanical properties.
Mat. & Design 204 (2021), 109628. https://doi.org/10.1016/j.matdes.2021.109628
| Speaker Country | Austria |
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