Academic Journal
Effect of powder properties, process parameters, and recoating speed on powder layer properties measured by in-situ laser profilometry and part properties in laser powder bed fusion
| العنوان: | Effect of powder properties, process parameters, and recoating speed on powder layer properties measured by in-situ laser profilometry and part properties in laser powder bed fusion |
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| المؤلفون: | Spurek, Marvin A., Sillani, Francesco, id_orcid:0 000-0002-2916-8953, Haferkamp, Lukas, Tosoratti, Enrico, id_orcid:0 000-0002-7152-9361, Spierings, Adriaan B., Magazzeni, Christopher M., Meisnar, Martina, Wegener, Konrad |
| المصدر: | Additive Manufacturing, 95 |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2024 |
| المجموعة: | ETH Zürich Research Collection |
| مصطلحات موضوعية: | Powder bed fusion of metals (PBF-LB/M), Powder layer quality, Powder spreadability, Laser profilometry, In-situ monitoring, Process monitoring |
| الوصف: | In laser-based powder bed fusion of metals (PBF-LB/M), the powder layer is the link between the powder properties and the resulting part quality. Powder layer quality is a key metric related to powder spreadability and ultimately part quality, yet it is still unclear how it can be quantified. This is due to the difficulty of studying powder layer properties during the process. This study investigates the influence of powder properties, process parameters, and recoating speed on the surface roughness of the powder layer and the part, as well as on the effective thickness of the powder layer and solidified layer, and the resulting relative part density. Utilizing in-situ laser profilometry, high-resolution topographical data of the powder layer and the part surface were acquired, with minimal interference to the PBF-LB/M process. Six AlSi10Mg powders with varying particle size distribution, morphology, and flowability were processed using a wide range of recoating speeds and scan speeds to create powder layers with a wide range of properties. The results reveal a strong correlation between energy input and the effective powder layer thickness where lower scan speed results in an increased effective powder layer thickness due to material losses. Additionally, faster recoating decreases the powder layer density, which is moderated by the median particle size where the effect is strongest for fine powders. The surface roughness of the powder layer and top part surface are influenced by the recoating speed, energy input, and particle size, and they are strongly linked to each other. This highlights the importance of considering realistic substrate surface roughnesses in both powder spreading experiments and simulations. Finally, layer properties affect the process stability, resulting in small differences in relative part density. ; ISSN:2214-8604 |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/application/pdf |
| اللغة: | English |
| Relation: | http://hdl.handle.net/20.500.11850/705675 |
| DOI: | 10.3929/ethz-b-000705675 |
| الاتاحة: | https://hdl.handle.net/20.500.11850/705675 https://doi.org/10.3929/ethz-b-000705675 |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ ; Creative Commons Attribution 4.0 International |
| رقم الانضمام: | edsbas.8A560900 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3929/ethz-b-000705675 |
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