Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy
We have investigated the effect of heat treatment on the microstructure, texture and formability of highstrength aluminium Al2024 sheets of gauge thicknesses 1.27 mm and 2.03 mm. Both optical and electron microscopy were employed to characterise the microstructure. Tensile tests performed at 0?, 45?...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier S.A.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/18507 |
| _version_ | 1848749763682369536 |
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| author | Loo Chin Moy, Charles Weiss, M. Xia, J. Sha, G. Ringer, S. Ranzi, G. |
| author_facet | Loo Chin Moy, Charles Weiss, M. Xia, J. Sha, G. Ringer, S. Ranzi, G. |
| author_sort | Loo Chin Moy, Charles |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have investigated the effect of heat treatment on the microstructure, texture and formability of highstrength aluminium Al2024 sheets of gauge thicknesses 1.27 mm and 2.03 mm. Both optical and electron microscopy were employed to characterise the microstructure. Tensile tests performed at 0?, 45? and 90? to the rolling direction were used as an indication of the anisotropic behaviour of the sheets. The formability of the sheets was assessed by performing stretch forming tests over a hemispherical punch. Comparison of microstructure and material properties indicated an effect of precipitation hardening on the overall anisotropy of the investigated materials. We report an improvement in the total elongation under uniaxial tension with a loss in strength for 2.5 h and 2 days ageing while the ageing treatment for 1 week (peak hardness) resulted in increased strength with a decline in total elongation. The 1.27 mm thick sheet showed better drawability and least tendency to earing than the thicker sheet. The drawability was the highest at 45? to the rolling direction for the as-received material and those that had been aged for 2.5 h and 2 days. Forming limit diagrams derived from the stretch forming tests showed that the 2 days aged sample had the highest plane strain limit making it the most appropriate condition considering that the plane strain is usually the most critical forming strain in stamping applications. In addition, the 2 days aged sample had its plane strain shifted towards the biaxial stretching area which is likely to have a positive effect on some sheet forming applications. Finally, a formability index was calculated andcompared against the hardness plot. |
| first_indexed | 2025-11-14T07:26:07Z |
| format | Journal Article |
| id | curtin-20.500.11937-18507 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:26:07Z |
| publishDate | 2012 |
| publisher | Elsevier S.A. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-185072017-02-28T01:35:22Z Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy Loo Chin Moy, Charles Weiss, M. Xia, J. Sha, G. Ringer, S. Ranzi, G. Mechanical characterisation Electron backscatter diffraction Transmission electron microscopy Precipitation Formability We have investigated the effect of heat treatment on the microstructure, texture and formability of highstrength aluminium Al2024 sheets of gauge thicknesses 1.27 mm and 2.03 mm. Both optical and electron microscopy were employed to characterise the microstructure. Tensile tests performed at 0?, 45? and 90? to the rolling direction were used as an indication of the anisotropic behaviour of the sheets. The formability of the sheets was assessed by performing stretch forming tests over a hemispherical punch. Comparison of microstructure and material properties indicated an effect of precipitation hardening on the overall anisotropy of the investigated materials. We report an improvement in the total elongation under uniaxial tension with a loss in strength for 2.5 h and 2 days ageing while the ageing treatment for 1 week (peak hardness) resulted in increased strength with a decline in total elongation. The 1.27 mm thick sheet showed better drawability and least tendency to earing than the thicker sheet. The drawability was the highest at 45? to the rolling direction for the as-received material and those that had been aged for 2.5 h and 2 days. Forming limit diagrams derived from the stretch forming tests showed that the 2 days aged sample had the highest plane strain limit making it the most appropriate condition considering that the plane strain is usually the most critical forming strain in stamping applications. In addition, the 2 days aged sample had its plane strain shifted towards the biaxial stretching area which is likely to have a positive effect on some sheet forming applications. Finally, a formability index was calculated andcompared against the hardness plot. 2012 Journal Article http://hdl.handle.net/20.500.11937/18507 Elsevier S.A. restricted |
| spellingShingle | Mechanical characterisation Electron backscatter diffraction Transmission electron microscopy Precipitation Formability Loo Chin Moy, Charles Weiss, M. Xia, J. Sha, G. Ringer, S. Ranzi, G. Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title | Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title_full | Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title_fullStr | Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title_full_unstemmed | Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title_short | Influence of heat treatment on the microstructure, texture and formability of Al2024 aluminium alloy |
| title_sort | influence of heat treatment on the microstructure, texture and formability of al2024 aluminium alloy |
| topic | Mechanical characterisation Electron backscatter diffraction Transmission electron microscopy Precipitation Formability |
| url | http://hdl.handle.net/20.500.11937/18507 |