Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion
Bulk metallic glasses (BMGs) are high-strength, highly elastic materials due to their disordered atomic structure. Because BMGs require sufficiently high cooling rates to bypass crystallization, laser-based additive manufacturing (AM) methods have recently been employed for the fabrication of BMGs....
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-02-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520309369 |
| _version_ | 1818822213642485760 |
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| author | Navid Sohrabi Jamasp Jhabvala Güven Kurtuldu Mihai Stoica Annapaola Parrilli Siddartha Berns Efthymios Polatidis Steven Van Petegem Sylvain Hugon Antonia Neels Jörg F. Löffler Roland E. Logé |
| author_facet | Navid Sohrabi Jamasp Jhabvala Güven Kurtuldu Mihai Stoica Annapaola Parrilli Siddartha Berns Efthymios Polatidis Steven Van Petegem Sylvain Hugon Antonia Neels Jörg F. Löffler Roland E. Logé |
| author_sort | Navid Sohrabi |
| collection | DOAJ |
| description | Bulk metallic glasses (BMGs) are high-strength, highly elastic materials due to their disordered atomic structure. Because BMGs require sufficiently high cooling rates to bypass crystallization, laser-based additive manufacturing (AM) methods have recently been employed for the fabrication of BMGs. In this study, we present an optimized Laser Powder-Bed Fusion (LPBF) process on a Zr-based BMG (Zr59.3Cu28.8Al10.4Nb1.5, in at.%), with a focus on characterization, mechanical properties, and dimensional accuracy. A volumetric density of 99.82% was achieved. Although the sample was qualified as amorphous via laboratory X-ray diffraction experiments, a more meticulous study using synchrotron radiation revealed nanocrystals in the heat-affected zones (HAZs) of the melt pool. Fast differential scanning calorimetry (FDSC) and numerical simulations were then employed to illustrate the mechanism of crystallization. The LPBF-processed alloy revealed excellent mechanical properties, such as high hardness, wear resistance, compressive strength, and flexural strength. Apart from vein-like patterns, the fracture surfaces of the compression test samples showed liquid-like features, which indicate a significant local temperature increase during fracture. The dimensional accuracy was assessed with a benchmark exhibiting complex geometrical features and reached at least 40 μm. The results indicate that LPBF processing is a promising route for the manufacturing of BMGs for various applications. |
| first_indexed | 2024-12-18T23:20:31Z |
| format | Article |
| id | doaj.art-5528b8e09a0a4a0eb7978d6af766d0a1 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-18T23:20:31Z |
| publishDate | 2021-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-5528b8e09a0a4a0eb7978d6af766d0a12022-12-21T20:47:59ZengElsevierMaterials & Design0264-12752021-02-01199109400Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusionNavid Sohrabi0Jamasp Jhabvala1Güven Kurtuldu2Mihai Stoica3Annapaola Parrilli4Siddartha Berns5Efthymios Polatidis6Steven Van Petegem7Sylvain Hugon8Antonia Neels9Jörg F. Löffler10Roland E. Logé11Thermomechanical Metallurgy Laboratory, PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), 2002 Neuchâtel, Switzerland; Corresponding author.Thermomechanical Metallurgy Laboratory, PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), 2002 Neuchâtel, SwitzerlandLaboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, SwitzerlandLaboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, SwitzerlandCenter for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, SwitzerlandCOMATEC HEIG-VD, 1400 Yverdon-les-Bains, SwitzerlandLaboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, 5232 Villingen-PSI, SwitzerlandPhotons for Engineering and Manufacturing, Paul Scherrer Institute, 5232 Villingen-PSI, SwitzerlandCOMATEC HEIG-VD, 1400 Yverdon-les-Bains, SwitzerlandCenter for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, SwitzerlandLaboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, SwitzerlandThermomechanical Metallurgy Laboratory, PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), 2002 Neuchâtel, SwitzerlandBulk metallic glasses (BMGs) are high-strength, highly elastic materials due to their disordered atomic structure. Because BMGs require sufficiently high cooling rates to bypass crystallization, laser-based additive manufacturing (AM) methods have recently been employed for the fabrication of BMGs. In this study, we present an optimized Laser Powder-Bed Fusion (LPBF) process on a Zr-based BMG (Zr59.3Cu28.8Al10.4Nb1.5, in at.%), with a focus on characterization, mechanical properties, and dimensional accuracy. A volumetric density of 99.82% was achieved. Although the sample was qualified as amorphous via laboratory X-ray diffraction experiments, a more meticulous study using synchrotron radiation revealed nanocrystals in the heat-affected zones (HAZs) of the melt pool. Fast differential scanning calorimetry (FDSC) and numerical simulations were then employed to illustrate the mechanism of crystallization. The LPBF-processed alloy revealed excellent mechanical properties, such as high hardness, wear resistance, compressive strength, and flexural strength. Apart from vein-like patterns, the fracture surfaces of the compression test samples showed liquid-like features, which indicate a significant local temperature increase during fracture. The dimensional accuracy was assessed with a benchmark exhibiting complex geometrical features and reached at least 40 μm. The results indicate that LPBF processing is a promising route for the manufacturing of BMGs for various applications.http://www.sciencedirect.com/science/article/pii/S0264127520309369Additive manufacturingBulk metallic glassLaser powder-bed fusionNano-crystallizationPrecision manufacturingSelective laser melting |
| spellingShingle | Navid Sohrabi Jamasp Jhabvala Güven Kurtuldu Mihai Stoica Annapaola Parrilli Siddartha Berns Efthymios Polatidis Steven Van Petegem Sylvain Hugon Antonia Neels Jörg F. Löffler Roland E. Logé Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion Materials & Design Additive manufacturing Bulk metallic glass Laser powder-bed fusion Nano-crystallization Precision manufacturing Selective laser melting |
| title | Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion |
| title_full | Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion |
| title_fullStr | Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion |
| title_full_unstemmed | Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion |
| title_short | Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion |
| title_sort | characterization mechanical properties and dimensional accuracy of a zr based bulk metallic glass manufactured via laser powder bed fusion |
| topic | Additive manufacturing Bulk metallic glass Laser powder-bed fusion Nano-crystallization Precision manufacturing Selective laser melting |
| url | http://www.sciencedirect.com/science/article/pii/S0264127520309369 |
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