Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy
An equiaxed, submicron grain size distribution was generated in an Al(0.1 wt.% Sc) alloy by processing through equal channel angular pressing followed by a low temperature pre-ageing heat treatment. The alloy was subsequently annealed for various times at 300, 350, 400 and 450 °C for investigating t...
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| Format: | Journal Article |
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Elsevier B.V.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/52681 |
| _version_ | 1848758985531850752 |
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| author | Bommareddy, A. Quadir, Md Zakaria Ferry, M. |
| author_facet | Bommareddy, A. Quadir, Md Zakaria Ferry, M. |
| author_sort | Bommareddy, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | An equiaxed, submicron grain size distribution was generated in an Al(0.1 wt.% Sc) alloy by processing through equal channel angular pressing followed by a low temperature pre-ageing heat treatment. The alloy was subsequently annealed for various times at 300, 350, 400 and 450 °C for investigating the thermal stability of the deformation microstructure. It was found that up to 400 °C, the submicron grain structure coarsens slowly and uniformly by a process of continuous recrystallization. Within this temperature range, the uniform dispersion of nano-sized Al 3Sc particles generated by the pre-ageing treatment substantially hinders grain coarsening by Zener pinning of the (sub)grain boundaries. At the higher annealing temperature of 450 °C, certain grains were found to grow discontinuously thereby generating a mixed microstructure consisting of both fine and coarse grains. The data in this study was combined with recent data for a higher solute Al(0.3 wt.% Sc) alloy for furthering our understanding of the time and temperature range in which this family of alloys is resistant to rapid, discontinuous grain coarsening (recrystallization). © 2011 Elsevier Ltd. All rights reserved. |
| first_indexed | 2025-11-14T09:52:41Z |
| format | Journal Article |
| id | curtin-20.500.11937-52681 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:52:41Z |
| publishDate | 2012 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-526812017-09-13T15:39:23Z Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy Bommareddy, A. Quadir, Md Zakaria Ferry, M. An equiaxed, submicron grain size distribution was generated in an Al(0.1 wt.% Sc) alloy by processing through equal channel angular pressing followed by a low temperature pre-ageing heat treatment. The alloy was subsequently annealed for various times at 300, 350, 400 and 450 °C for investigating the thermal stability of the deformation microstructure. It was found that up to 400 °C, the submicron grain structure coarsens slowly and uniformly by a process of continuous recrystallization. Within this temperature range, the uniform dispersion of nano-sized Al 3Sc particles generated by the pre-ageing treatment substantially hinders grain coarsening by Zener pinning of the (sub)grain boundaries. At the higher annealing temperature of 450 °C, certain grains were found to grow discontinuously thereby generating a mixed microstructure consisting of both fine and coarse grains. The data in this study was combined with recent data for a higher solute Al(0.3 wt.% Sc) alloy for furthering our understanding of the time and temperature range in which this family of alloys is resistant to rapid, discontinuous grain coarsening (recrystallization). © 2011 Elsevier Ltd. All rights reserved. 2012 Journal Article http://hdl.handle.net/20.500.11937/52681 10.1016/j.jallcom.2012.02.181 Elsevier B.V. restricted |
| spellingShingle | Bommareddy, A. Quadir, Md Zakaria Ferry, M. Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title | Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title_full | Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title_fullStr | Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title_full_unstemmed | Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title_short | Time and temperature regime of continuous grain coarsening in an ECAP-processed Al(0.1 wt.% Sc) alloy |
| title_sort | time and temperature regime of continuous grain coarsening in an ecap-processed al(0.1 wt.% sc) alloy |
| url | http://hdl.handle.net/20.500.11937/52681 |