Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact
The present paper evaluates the misalignment and geometry distortion of the standard National Institute of Standards and Technology (NIST) test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) process. To...
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MDPI AG
2020-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/22/5087 |
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| author | Silvia Martínez Naiara Ortega Diego Celentano Antonio J. Sánchez Egea Eneko Ukar A. Lamikiz |
| author_facet | Silvia Martínez Naiara Ortega Diego Celentano Antonio J. Sánchez Egea Eneko Ukar A. Lamikiz |
| author_sort | Silvia Martínez |
| collection | DOAJ |
| description | The present paper evaluates the misalignment and geometry distortion of the standard National Institute of Standards and Technology (NIST) test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) process. To this end, a coordinate-measuring machine (CMM) is used to measure the geometrical distortion in each manufacturing configuration, following the same measurement protocol. The results show that the laser path strategy favors a thermal gradient which, consequently, induces geometrical distortions in the part. To prove this hypothesis, a numerical simulation is performed to determine the thermal gradient and the pattern of the residual stresses. It was found that the geometrical distortion certainly depends on the position of the feature position and laser strategy, where thermal cycles and residual thermal stresses had an impact in the end-part geometry, especially if a high strength-to-weight ratio commonly used in aeronautics is present. |
| first_indexed | 2024-03-10T14:56:15Z |
| format | Article |
| id | doaj.art-d0b3ffde406946c9986c5e7505753ccc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:56:15Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d0b3ffde406946c9986c5e7505753ccc2023-11-20T20:34:35ZengMDPI AGMaterials1996-19442020-11-011322508710.3390/ma13225087Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test ArtifactSilvia Martínez0Naiara Ortega1Diego Celentano2Antonio J. Sánchez Egea3Eneko Ukar4A. Lamikiz5Department of Mechanical Engineering, Aeronautics Advanced Manufacturing Center (CFAA), Faculty of Engineering of Bilbao, Alameda de Urquijo s/n, 48013 Bilbao, SpainDepartment of Mechanical Engineering, Aeronautics Advanced Manufacturing Center (CFAA), Faculty of Engineering of Bilbao, Alameda de Urquijo s/n, 48013 Bilbao, SpainDepartment of Mechanical and Metallurgical Engineering, Pontificia Universidad Católica de Chile, 782-0436 Región Metropolitana, ChileDepartment of Mechanical Engineering (EEBE), Universitat Politècnica de Catalunya, Av. D’Eduard Maristany, 16, 08019 Barcelona, SpainDepartment of Mechanical Engineering, Aeronautics Advanced Manufacturing Center (CFAA), Faculty of Engineering of Bilbao, Alameda de Urquijo s/n, 48013 Bilbao, SpainDepartment of Mechanical Engineering, Aeronautics Advanced Manufacturing Center (CFAA), Faculty of Engineering of Bilbao, Alameda de Urquijo s/n, 48013 Bilbao, SpainThe present paper evaluates the misalignment and geometry distortion of the standard National Institute of Standards and Technology (NIST) test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) process. To this end, a coordinate-measuring machine (CMM) is used to measure the geometrical distortion in each manufacturing configuration, following the same measurement protocol. The results show that the laser path strategy favors a thermal gradient which, consequently, induces geometrical distortions in the part. To prove this hypothesis, a numerical simulation is performed to determine the thermal gradient and the pattern of the residual stresses. It was found that the geometrical distortion certainly depends on the position of the feature position and laser strategy, where thermal cycles and residual thermal stresses had an impact in the end-part geometry, especially if a high strength-to-weight ratio commonly used in aeronautics is present.https://www.mdpi.com/1996-1944/13/22/5087SLMgeometry distortionInconel 718substrate thicknessnumerical simulation |
| spellingShingle | Silvia Martínez Naiara Ortega Diego Celentano Antonio J. Sánchez Egea Eneko Ukar A. Lamikiz Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact Materials SLM geometry distortion Inconel 718 substrate thickness numerical simulation |
| title | Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact |
| title_full | Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact |
| title_fullStr | Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact |
| title_full_unstemmed | Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact |
| title_short | Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact |
| title_sort | analysis of the part distortions for inconel 718 slm a case study on the nist test artifact |
| topic | SLM geometry distortion Inconel 718 substrate thickness numerical simulation |
| url | https://www.mdpi.com/1996-1944/13/22/5087 |
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