Influence of Microstructure and Surface Roughness on Oxidation Kinetics at 500–600 °C of Ti–6Al–4V Alloy Fabricated by Additive Manufacturing
| Autor: | Jonathan Hugues, Daniel Monceau, Antoine Casadebaigt |
|---|---|
| Přispěvatelé: | Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), IRT Saint Exupéry - Institut de Recherche Technologique, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), IRT Saint Exupéry - Institut de Recherche Technologique (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Additive manufacturing Matériaux Alloy Oxide chemistry.chemical_element 02 engineering and technology engineering.material 01 natural sciences SLM [SPI.MAT]Engineering Sciences [physics]/Materials Inorganic Chemistry chemistry.chemical_compound 0103 physical sciences Oxidation Materials Chemistry Surface roughness [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Composite material Génie des procédés 010302 applied physics Titanium Acicular Metals and Alloys 021001 nanoscience & nanotechnology Microstructure High temperature Casting TA6V chemistry Martensite engineering 0210 nano-technology |
| Zdroj: | Oxidation of Metals Oxidation of Metals, Springer Verlag, 2018, 90 (5-6), pp.633-648. ⟨10.1007/s11085-018-9859-0⟩ |
| ISSN: | 0030-770X 1573-4889 |
| Popis: | International audience; Ti--6Al--4V alloy (TA6V) is the most commonly used titanium-based alloy and is usually manufactured by casting, forging or rolling. Additive manufacturing is a new way of processing metal alloys; it is currently used for production purposes. This study focuses on the microstructure and oxidation kinetics of Ti--6Al--4V fabricated by laser beam melting. Some samples were HIP-treated (hot isostatic pressure). Ti--6Al--4V rolled and annealed was used as a reference material. Ti--6Al--4V fabricated by LBM exhibited prior $\beta$ grains elongated in the building direction with fully acicular martensite, $\alpha${\textasciiacutex}. Isothermal oxidations were performed at 500, 550 and 600Â {\textdegree}C for durations of 100, 200 and 500Â h. The oxidation kinetics followed a parabolic law. The weight gain of as-built LBM samples was twice as high as that of ground LBM samples of Ti--6Al--4V, although both sets had the same oxide layer thickness and depth of oxygen diffusion in the alloy. Ground LBM samples presented an oxidation rate close to that of conventional rolled and annealed Ti--6Al--4V alloys. It was shown the higher weight gain of LBM-produced Ti--6Al--4V samples was mainly due to their higher specific area and to the oxidation of partially melted powder on their surface. |
| Databáze: | OpenAIRE |
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