A new insight on the analysis of residual stresses related distortions in selective laser melting of Ti-6Al-4 V using the improved bridge curvature method
| Autor: | Mehdi Salem, Sabine Le Roux, Gilles Dour, Anis Hor |
|---|---|
| Přispěvatelé: | Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Advisian, Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Selective laser melting Biomedical Engineering Geometry 02 engineering and technology 021001 nanoscience & nanotechnology Curvature Industrial and Manufacturing Engineering Temperature gradient [SPI]Engineering Sciences [physics] 020901 industrial engineering & automation Amplitude thermal stresses Residual stress Distortion residual stresses scanning strategy General Materials Science distortion 0210 nano-technology Anisotropy Engineering (miscellaneous) Near net shape |
| Zdroj: | Additive Manufacturing Additive Manufacturing, Elsevier, 2020, 36, pp.1-16/101586. ⟨10.1016/j.addma.2020.101586⟩ Additive Manufacturing, 2020, 36, pp.1-16/101586. ⟨10.1016/j.addma.2020.101586⟩ |
| ISSN: | 2214-8604 2214-7810 |
| DOI: | 10.1016/j.addma.2020.101586⟩ |
| Popis: | International audience; Residual stresses are a major issue in the Selective Laser Melting process, which allows to build near net shape parts by stacking several thousand weld beads. This experimental study aims to investigate the relationships between process parameters and the part distortion. Based on the Bridge Curvature Method (BCM) and 3D topographic measurements of the top surface of the specimens, the effect of the volumetric energy density, the geometry and the scanning strategy are analyzed. The method and the proposed distortion criteria clearly highlight the anisotropy of the residual stress state, which depends on the direction and the speed of the scanning. The main curvature is oriented along scan direction for scanning speed higher than 1000 mm/s. The decrease in volumetric energy increases distortion, below a threshold value. The scan vector length, which can be varied by changing the scanning strategy and the specimen geometry, plays a primordial role on the residual stresses. The distortion amplitude decreases by shortening the scan vectors. Finally, the prospect of an adimensional analytical model taking into account the transient thermal gradient is given. |
| Databáze: | OpenAIRE |
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