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Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg

Tailoring heat treatments for Laser Powder Bed Fusion (LPBF) processed materials is critical to ensure superior and repeatable material properties for high-end applications. This tailoring requires in-depth understanding of the LPBF-processed material. Therefore, the current study aims at unravellin...

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Autores principales: Van Cauwenbergh, P., Samaee, V., Thijs, L., Nejezchlebová, J., Sedlák, P., Iveković, A., Schryvers, D., Van Hooreweder, B., Vanmeensel, K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7979699/
https://www.ncbi.nlm.nih.gov/pubmed/33742014
http://dx.doi.org/10.1038/s41598-021-85047-2
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author Van Cauwenbergh, P.
Samaee, V.
Thijs, L.
Nejezchlebová, J.
Sedlák, P.
Iveković, A.
Schryvers, D.
Van Hooreweder, B.
Vanmeensel, K.
author_facet Van Cauwenbergh, P.
Samaee, V.
Thijs, L.
Nejezchlebová, J.
Sedlák, P.
Iveković, A.
Schryvers, D.
Van Hooreweder, B.
Vanmeensel, K.
author_sort Van Cauwenbergh, P.
collection PubMed
description Tailoring heat treatments for Laser Powder Bed Fusion (LPBF) processed materials is critical to ensure superior and repeatable material properties for high-end applications. This tailoring requires in-depth understanding of the LPBF-processed material. Therefore, the current study aims at unravelling the threefold interrelationship between the process (LPBF and heat treatment), the microstructure at different scales (macro-, meso-, micro-, and nano-scale), and the macroscopic material properties of AlSi10Mg. A similar solidification trajectory applies at different length scales when comparing the solidification of AlSi10Mg, ranging from mould-casting to rapid solidification (LPBF). The similarity in solidification trajectories triggers the reason why the Brody-Flemings cellular microsegregation solidification model could predict the cellular morphology of the LPBF as-printed microstructure. Where rapid solidification occurs at a much finer scale, the LPBF microstructure exhibits a significant grain refinement and a high degree of silicon (Si) supersaturation. This study has identified the grain refinement and Si supersaturation as critical assets of the as-printed microstructure, playing a vital role in achieving superior mechanical and thermal properties during heat treatment. Next, an electrical conductivity model could accurately predict the Si solute concentration in LPBF-processed and heat-treated AlSi10Mg and allows understanding the microstructural evolution during heat treatment. The LPBF-processed and heat-treated AlSi10Mg conditions (as-built (AB), direct-aged (DA), stress-relieved (SR), preheated (PH)) show an interesting range of superior mechanical properties (tensile strength: 300–450 MPa, elongation: 4–13%) compared to the mould-cast T6 reference condition.
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spelling pubmed-79796992021-03-25 Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg Van Cauwenbergh, P. Samaee, V. Thijs, L. Nejezchlebová, J. Sedlák, P. Iveković, A. Schryvers, D. Van Hooreweder, B. Vanmeensel, K. Sci Rep Article Tailoring heat treatments for Laser Powder Bed Fusion (LPBF) processed materials is critical to ensure superior and repeatable material properties for high-end applications. This tailoring requires in-depth understanding of the LPBF-processed material. Therefore, the current study aims at unravelling the threefold interrelationship between the process (LPBF and heat treatment), the microstructure at different scales (macro-, meso-, micro-, and nano-scale), and the macroscopic material properties of AlSi10Mg. A similar solidification trajectory applies at different length scales when comparing the solidification of AlSi10Mg, ranging from mould-casting to rapid solidification (LPBF). The similarity in solidification trajectories triggers the reason why the Brody-Flemings cellular microsegregation solidification model could predict the cellular morphology of the LPBF as-printed microstructure. Where rapid solidification occurs at a much finer scale, the LPBF microstructure exhibits a significant grain refinement and a high degree of silicon (Si) supersaturation. This study has identified the grain refinement and Si supersaturation as critical assets of the as-printed microstructure, playing a vital role in achieving superior mechanical and thermal properties during heat treatment. Next, an electrical conductivity model could accurately predict the Si solute concentration in LPBF-processed and heat-treated AlSi10Mg and allows understanding the microstructural evolution during heat treatment. The LPBF-processed and heat-treated AlSi10Mg conditions (as-built (AB), direct-aged (DA), stress-relieved (SR), preheated (PH)) show an interesting range of superior mechanical properties (tensile strength: 300–450 MPa, elongation: 4–13%) compared to the mould-cast T6 reference condition. Nature Publishing Group UK 2021-03-19 /pmc/articles/PMC7979699/ /pubmed/33742014 http://dx.doi.org/10.1038/s41598-021-85047-2 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Van Cauwenbergh, P.
Samaee, V.
Thijs, L.
Nejezchlebová, J.
Sedlák, P.
Iveković, A.
Schryvers, D.
Van Hooreweder, B.
Vanmeensel, K.
Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title_full Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title_fullStr Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title_full_unstemmed Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title_short Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg
title_sort unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated alsi10mg
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7979699/
https://www.ncbi.nlm.nih.gov/pubmed/33742014
http://dx.doi.org/10.1038/s41598-021-85047-2
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