Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders
Ultrafine-grained Al matrix nanocomposites, reinforced with Al<sub>2</sub>O<sub>3</sub> nanoparticles, were produced from milled powders, either by equal channel angular pressing (ECAP), at room or high temperature, with or without back pressure, or by spark plasma sintering...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/5/825 |
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| author | Antoine Lacour-Gogny-Goubert Véronique Doquet Marc Novelli Alexandre Tanguy Simon Hallais Julie Bourgon Benjamin Villeroy Roxane Massion |
| author_facet | Antoine Lacour-Gogny-Goubert Véronique Doquet Marc Novelli Alexandre Tanguy Simon Hallais Julie Bourgon Benjamin Villeroy Roxane Massion |
| author_sort | Antoine Lacour-Gogny-Goubert |
| collection | DOAJ |
| description | Ultrafine-grained Al matrix nanocomposites, reinforced with Al<sub>2</sub>O<sub>3</sub> nanoparticles, were produced from milled powders, either by equal channel angular pressing (ECAP), at room or high temperature, with or without back pressure, or by spark plasma sintering (SPS). Their microstructures, mechanical properties (compression, hardness, and sliding wear), and thermal stabilities (thermally induced softening and cracking) were compared, and the advantages and limitations of each process discussed on a scientific but also practical point of view. For the most successful set of process parameters, the yield stress in compression reached 380 MPa, the hardness, HV = 139, remained stable up to 500 °C, and the resistance to sliding wear was comparable to that of Al 5083, and better than that of Al 7075-T6. While the samples consolidated at high temperatures (by ECAP or SPS) showed a good thermal stability, those consolidated by ECAP at room temperature were prone to thermally induced softening and cracking, which was related to trapped and pressurized gases. |
| first_indexed | 2024-03-11T03:30:26Z |
| format | Article |
| id | doaj.art-7a1f8132aeff4e75992ca1983ac65713 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T03:30:26Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7a1f8132aeff4e75992ca1983ac657132023-11-18T02:26:22ZengMDPI AGMetals2075-47012023-04-0113582510.3390/met13050825Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled PowdersAntoine Lacour-Gogny-Goubert0Véronique Doquet1Marc Novelli2Alexandre Tanguy3Simon Hallais4Julie Bourgon5Benjamin Villeroy6Roxane Massion7Laboratoire de Mécanique des Solides, CNRS UMR 7649, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, FranceLaboratoire de Mécanique des Solides, CNRS UMR 7649, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, FranceLEM3 Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Université de Lorraine, CNRS UMR 7239, Arts et Métiers ParisTech, 7 Rue Félix Savart, 57070 Metz, FranceLaboratoire de Mécanique des Solides, CNRS UMR 7649, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, FranceLaboratoire de Mécanique des Solides, CNRS UMR 7649, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, FranceInstitut de Chimie et des Matériaux Paris-Est, Université Paris Est Creteil, CNRS UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, FranceInstitut de Chimie et des Matériaux Paris-Est, Université Paris Est Creteil, CNRS UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, FranceLEM3 Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Université de Lorraine, CNRS UMR 7239, Arts et Métiers ParisTech, 7 Rue Félix Savart, 57070 Metz, FranceUltrafine-grained Al matrix nanocomposites, reinforced with Al<sub>2</sub>O<sub>3</sub> nanoparticles, were produced from milled powders, either by equal channel angular pressing (ECAP), at room or high temperature, with or without back pressure, or by spark plasma sintering (SPS). Their microstructures, mechanical properties (compression, hardness, and sliding wear), and thermal stabilities (thermally induced softening and cracking) were compared, and the advantages and limitations of each process discussed on a scientific but also practical point of view. For the most successful set of process parameters, the yield stress in compression reached 380 MPa, the hardness, HV = 139, remained stable up to 500 °C, and the resistance to sliding wear was comparable to that of Al 5083, and better than that of Al 7075-T6. While the samples consolidated at high temperatures (by ECAP or SPS) showed a good thermal stability, those consolidated by ECAP at room temperature were prone to thermally induced softening and cracking, which was related to trapped and pressurized gases.https://www.mdpi.com/2075-4701/13/5/825metal matrix nanocompositespowder consolidationECAPSPSthermal stabilitythermal cracking |
| spellingShingle | Antoine Lacour-Gogny-Goubert Véronique Doquet Marc Novelli Alexandre Tanguy Simon Hallais Julie Bourgon Benjamin Villeroy Roxane Massion Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders Metals metal matrix nanocomposites powder consolidation ECAP SPS thermal stability thermal cracking |
| title | Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders |
| title_full | Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders |
| title_fullStr | Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders |
| title_full_unstemmed | Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders |
| title_short | Microstructure, Mechanical Properties, and Thermal Stability of Al-Al<sub>2</sub>O<sub>3</sub> Nanocomposites Consolidated by ECAP or SPS from Milled Powders |
| title_sort | microstructure mechanical properties and thermal stability of al al sub 2 sub o sub 3 sub nanocomposites consolidated by ecap or sps from milled powders |
| topic | metal matrix nanocomposites powder consolidation ECAP SPS thermal stability thermal cracking |
| url | https://www.mdpi.com/2075-4701/13/5/825 |
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