Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion
Through tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed that additively produced samples exhibit anisotropic microstru...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/14/2/117 |
| _version_ | 1827343806592188416 |
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| author | Dennis Milaege Niklas Eschemann Kay-Peter Hoyer Mirko Schaper |
| author_facet | Dennis Milaege Niklas Eschemann Kay-Peter Hoyer Mirko Schaper |
| author_sort | Dennis Milaege |
| collection | DOAJ |
| description | Through tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed that additively produced samples exhibit anisotropic microstructures. This anisotropy compromises the mechanical properties and complicates the loading state in the implant. Moreover, the minimum requirements as specified per designated standards such as ISO 5832-11 are not met. The remedy to this problem is performing a conventional heat treatment. As this route requires energy, infrastructure, labor, and expertise, which in turn mean time and money, many of the additive manufacturing benefits are negated. Thus, the goal of this work was to achieve better isotropy by applying only adapted additive manufacturing process parameters, specifically focusing on the build orientations. In this work, samples orientated in 90°, 45°, and 0° directions relative to the building platform were manufactured and tested. These tests included mechanical (tensile and fatigue tests) as well as microstructural analyses (SEM and EBSD). Subsequently, the results of these tests such as fractography were correlated with the acquired mechanical properties. These showed that 90°-aligned samples performed best under fatigue load and that all requirements specified by the standard regarding monotonic load were met. |
| first_indexed | 2024-03-07T22:36:39Z |
| format | Article |
| id | doaj.art-8ffbb5e0c03b43708ebb7d3b4374a6a8 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-07T22:36:39Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-8ffbb5e0c03b43708ebb7d3b4374a6a82024-02-23T15:13:07ZengMDPI AGCrystals2073-43522024-01-0114211710.3390/cryst14020117Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed FusionDennis Milaege0Niklas Eschemann1Kay-Peter Hoyer2Mirko Schaper3Chair of Materials Science (LWK), Paderborn University, Warburger Straße 100, 33098 Paderborn, GermanyChair of Materials Science (LWK), Paderborn University, Warburger Straße 100, 33098 Paderborn, GermanyChair of Materials Science (LWK), Paderborn University, Warburger Straße 100, 33098 Paderborn, GermanyChair of Materials Science (LWK), Paderborn University, Warburger Straße 100, 33098 Paderborn, GermanyThrough tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed that additively produced samples exhibit anisotropic microstructures. This anisotropy compromises the mechanical properties and complicates the loading state in the implant. Moreover, the minimum requirements as specified per designated standards such as ISO 5832-11 are not met. The remedy to this problem is performing a conventional heat treatment. As this route requires energy, infrastructure, labor, and expertise, which in turn mean time and money, many of the additive manufacturing benefits are negated. Thus, the goal of this work was to achieve better isotropy by applying only adapted additive manufacturing process parameters, specifically focusing on the build orientations. In this work, samples orientated in 90°, 45°, and 0° directions relative to the building platform were manufactured and tested. These tests included mechanical (tensile and fatigue tests) as well as microstructural analyses (SEM and EBSD). Subsequently, the results of these tests such as fractography were correlated with the acquired mechanical properties. These showed that 90°-aligned samples performed best under fatigue load and that all requirements specified by the standard regarding monotonic load were met.https://www.mdpi.com/2073-4352/14/2/117laser powder bed fusionTi-6Al-7Nbbiomedicalhigh-cycle fatiguemicrostructure |
| spellingShingle | Dennis Milaege Niklas Eschemann Kay-Peter Hoyer Mirko Schaper Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion Crystals laser powder bed fusion Ti-6Al-7Nb biomedical high-cycle fatigue microstructure |
| title | Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion |
| title_full | Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion |
| title_fullStr | Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion |
| title_full_unstemmed | Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion |
| title_short | Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion |
| title_sort | anisotropic mechanical and microstructural properties of a ti 6al 7nb alloy for biomedical applications manufactured via laser powder bed fusion |
| topic | laser powder bed fusion Ti-6Al-7Nb biomedical high-cycle fatigue microstructure |
| url | https://www.mdpi.com/2073-4352/14/2/117 |
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