Date
2018-01-22Author
Günther, JohannesBrenne, FlorianDroste, MatthiasWendler, MarcoVolkova, OlenaBiermann, HorstNiendorf, ThomasSubject
620 Engineering 660 Chemical engineering Rapid Prototyping <Fertigung>MikrostrukturElektronenstrahlschmelzenMetallLegierungMechanische EigenschaftMetadata
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Aufsatz
Design of novel materials for additive manufacturing - Isotropic microstructure and high defect tolerance
Abstract
Electron Beam Melting (EBM) is a powder-bed additive manufacturing technology enabling the production of complex metallic parts with generally good mechanical properties. However, the performance of powder-bed based additively manufactured materials is governed by multiple factors that are difficult to control. Alloys that solidify in cubic crystal structures are usually affected by strong anisotropy due to the formation of columnar grains of preferred orientation. Moreover, processing induced defects and porosity detrimentally influence static and cyclic mechanical properties. The current study presents results on processing of a metastable austenitic CrMnNi steel by EBM. Due to multiple phase transformations induced by intrinsic heat-treatment in the layer-wise EBM process the material develops a fine-grained microstructure almost without a preferred crystallographic grain orientation. The deformation-induced phase transformation yields high damage tolerance and, thus, excellent mechanical properties less sensitive to process-induced inhomogeneities. Various scan strategies were applied to evaluate the width of an appropriate process window in terms of microstructure evolution, porosity and change of chemical composition.
Citation
In: Scientific Reports Volume 8 (2018-01-22) eissn:2045-2322Citation
@article{doi:10.17170/kobra-202305097978,
author={Günther, Johannes and Brenne, Florian and Droste, Matthias and Wendler, Marco and Volkova, Olena and Biermann, Horst and Niendorf, Thomas},
title={Design of novel materials for additive manufacturing - Isotropic microstructure and high defect tolerance},
journal={Scientific Reports},
year={2018}
}
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2023-05-17T13:55:22Z 2023-05-17T13:55:22Z 2018-01-22 doi:10.17170/kobra-202305097978 http://hdl.handle.net/123456789/14714 eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ mechanical properties metals and alloys 620 660 Design of novel materials for additive manufacturing - Isotropic microstructure and high defect tolerance Aufsatz Electron Beam Melting (EBM) is a powder-bed additive manufacturing technology enabling the production of complex metallic parts with generally good mechanical properties. However, the performance of powder-bed based additively manufactured materials is governed by multiple factors that are difficult to control. Alloys that solidify in cubic crystal structures are usually affected by strong anisotropy due to the formation of columnar grains of preferred orientation. Moreover, processing induced defects and porosity detrimentally influence static and cyclic mechanical properties. The current study presents results on processing of a metastable austenitic CrMnNi steel by EBM. Due to multiple phase transformations induced by intrinsic heat-treatment in the layer-wise EBM process the material develops a fine-grained microstructure almost without a preferred crystallographic grain orientation. The deformation-induced phase transformation yields high damage tolerance and, thus, excellent mechanical properties less sensitive to process-induced inhomogeneities. Various scan strategies were applied to evaluate the width of an appropriate process window in terms of microstructure evolution, porosity and change of chemical composition. open access Günther, Johannes Brenne, Florian Droste, Matthias Wendler, Marco Volkova, Olena Biermann, Horst Niendorf, Thomas doi:10.1038/s41598-018-19376-0 Rapid Prototyping <Fertigung> Mikrostruktur Elektronenstrahlschmelzen Metall Legierung Mechanische Eigenschaft publishedVersion eissn:2045-2322 Scientific Reports Volume 8 false 1298
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