MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties
Metal–matrix composites (MMC) of aluminium alloy 7075 (AA7075) containing 1 wt.% and 0.5 wt.% multiwall carbon nanotubes (MWCNTs) were developed by powder metallurgy, using a high energy ball milling (HEBM) process for dispersion of the MWCNTs. The powder of the AA7075-MWCNT obtained was characteriz...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/6/969 |
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| author | Iria Feijoo Gloria Pena Marta Cabeza M. Julia Cristóbal Pilar Rey |
| author_facet | Iria Feijoo Gloria Pena Marta Cabeza M. Julia Cristóbal Pilar Rey |
| author_sort | Iria Feijoo |
| collection | DOAJ |
| description | Metal–matrix composites (MMC) of aluminium alloy 7075 (AA7075) containing 1 wt.% and 0.5 wt.% multiwall carbon nanotubes (MWCNTs) were developed by powder metallurgy, using a high energy ball milling (HEBM) process for dispersion of the MWCNTs. The powder of the AA7075-MWCNT obtained was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The microstructural changes produced during the milling process, such as the modification of the crystallite size, as well as the micro-deformation of the matrix crystal lattice, were determined using the Scherrer formula. After consolidation into a strip shape using the hot powder extrusion (HPE) process at 500 °C, no porosity was detected and a fine homogeneous dispersion of the reinforcement into the matrix was obtained. After performing a 0.2 HV test and tensile tests in the extruded profiles of both composites, a better combination of properties was found in samples of AA7075-0.5 wt.% MWCNT, with the increase in measured ductility being especially remarkable. |
| first_indexed | 2024-03-10T10:20:29Z |
| format | Article |
| id | doaj.art-7166a3f8a2b04cbb9d1f93a07dd9c79e |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T10:20:29Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7166a3f8a2b04cbb9d1f93a07dd9c79e2023-11-22T00:27:10ZengMDPI AGMetals2075-47012021-06-0111696910.3390/met11060969MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical PropertiesIria Feijoo0Gloria Pena1Marta Cabeza2M. Julia Cristóbal3Pilar Rey4CINTECX, Universidade de Vigo, Encomat, 36310 Vigo, SpainCINTECX, Universidade de Vigo, Encomat, 36310 Vigo, SpainCINTECX, Universidade de Vigo, Encomat, 36310 Vigo, SpainCINTECX, Universidade de Vigo, Encomat, 36310 Vigo, SpainAIMEN Centro Tecnológico, 36410 O Porriño, SpainMetal–matrix composites (MMC) of aluminium alloy 7075 (AA7075) containing 1 wt.% and 0.5 wt.% multiwall carbon nanotubes (MWCNTs) were developed by powder metallurgy, using a high energy ball milling (HEBM) process for dispersion of the MWCNTs. The powder of the AA7075-MWCNT obtained was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The microstructural changes produced during the milling process, such as the modification of the crystallite size, as well as the micro-deformation of the matrix crystal lattice, were determined using the Scherrer formula. After consolidation into a strip shape using the hot powder extrusion (HPE) process at 500 °C, no porosity was detected and a fine homogeneous dispersion of the reinforcement into the matrix was obtained. After performing a 0.2 HV test and tensile tests in the extruded profiles of both composites, a better combination of properties was found in samples of AA7075-0.5 wt.% MWCNT, with the increase in measured ductility being especially remarkable.https://www.mdpi.com/2075-4701/11/6/969aluminium–matrix compositesAA7075high energy ball milling (HEBM)multiwall carbon nanotubes (MWCNT)powder metallurgyextrusion |
| spellingShingle | Iria Feijoo Gloria Pena Marta Cabeza M. Julia Cristóbal Pilar Rey MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties Metals aluminium–matrix composites AA7075 high energy ball milling (HEBM) multiwall carbon nanotubes (MWCNT) powder metallurgy extrusion |
| title | MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties |
| title_full | MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties |
| title_fullStr | MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties |
| title_full_unstemmed | MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties |
| title_short | MWCNT-Reinforced AA7075 Composites: Effect of Reinforcement Percentage on Mechanical Properties |
| title_sort | mwcnt reinforced aa7075 composites effect of reinforcement percentage on mechanical properties |
| topic | aluminium–matrix composites AA7075 high energy ball milling (HEBM) multiwall carbon nanotubes (MWCNT) powder metallurgy extrusion |
| url | https://www.mdpi.com/2075-4701/11/6/969 |
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