Influence on microstructure, strength and ductility of build platform temperature during laser powder bed fusion of AlSi10Mg
| Autor: | Eric Maire, Thierry Douillard, Aude Simar, Lv Zhao, Grzegorz Pyka, Juan Guillermo Santos Macias |
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| Přispěvatelé: | Institute of Mechanics, Materials and Civil Engineering [Louvain] (IMMC), Université Catholique de Louvain = Catholic University of Louvain (UCL), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Huazhong University of Science and Technology [Wuhan] (HUST), Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, UCL - SST/IMMC/IMAP - Materials and process engineering, Université de Lyon - Mateis, INSA Lyon, Huazhong University of Science and Technology - Department of Mechanics, Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment - n/a |
| Jazyk: | angličtina |
| Předmět: |
Materials science
Polymers and Plastics microstructure 02 engineering and technology 01 natural sciences Focused ion beam strengthening mechanism [SPI.MAT]Engineering Sciences [physics]/Materials Residual stress 0103 physical sciences Aluminium alloy Selective laser melting Composite material Ductility ComputingMilieux_MISCELLANEOUS Eutectic system 010302 applied physics Metals and Alloys 021001 nanoscience & nanotechnology Microstructure Electronic Optical and Magnetic Materials Temperature gradient visual_art Laser powder bed fusion Ceramics and Composites visual_art.visual_art_medium aluminium alloy 0210 nano-technology damage initiation |
| Zdroj: | Acta Materialia Acta Materialia, Elsevier, 2020, 201, pp.231-243. ⟨10.1016/j.actamat.2020.10.001⟩ Acta Materialia, Vol. 201, p. 231-243 (2020) |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2020.10.001 |
| Popis: | AlSi10Mg manufactured by laser powder bed fusion (or selective laser melting) benefits from a very fine microstructure that imparts significant mechanical strength to the material compared to the cast alloy. The build platform temperature stands out as a significant processing parameter influencing the microstructure as it affects the cooling rate and thermal gradient during manufacturing. Setting the build platform temperature to 200°C yields a negligible residual stress level. However, the strength is lower compared to that obtained using a build platform temperature of 35°C, with a similar fracture strain. A detailed 3D microstructural analysis involving focused ion beam/scanning electron microscopy tomography was performed to describe the connectivity and size of the Si-rich eutectic network and link it to the strength and fracture strain. The coarser microstructure of the 200°C build platform material is more prone to damage. The α-Al cells as well as the Si-rich precipitates present a larger size in the 200°C material, the latter thus having a lower strengthening effect. The Si-rich eutectic network is also less interconnected and has a larger thickness in the 200°C material. An analytical model is developed to exploit these microstructural features and predict the strength of the two materials. |
| Databáze: | OpenAIRE |
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