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The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour
Copper type shear band formation in AI-1 Mg and its influence on recrystallisation phenomena has been investigated. This study includes the development of a suitable plane strain compression (PSC) apparatus, and an analysis of the deformation and recrystallisation structures which evolve from a matr...
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| Format: | Thesis |
| Language: | English English |
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Centre for Materials Engineering
2026
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| _version_ | 1867613249269137408 |
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| access_status_str | Open Access |
| author | Duckham, Alan |
| author2 | Knutsen, Robert D |
| author_browse | Duckham, Alan Knutsen, Robert D |
| author_facet | Knutsen, Robert D Duckham, Alan |
| author_sort | Duckham, Alan |
| collection | Thesis |
| description | Copper type shear band formation in AI-1 Mg and its influence on recrystallisation phenomena has been investigated. This study includes the development of a suitable plane strain compression (PSC) apparatus, and an analysis of the deformation and recrystallisation structures which evolve from a matrix of experiments incorporating temperature, strain and strain rate variables. A PSC test rig was purposely designed and built to facilitate the controlled high temperature deformation of aluminium specimens. The design of the apparatus ensured that strain distribution within a specimen is uniform while simultaneously limiting lateral spread. A small amount of lateral platen movement of the apparatus has been observed to cause asymmetric flow due to rotation of the plastic-rigid exit boundaries within the deforming specimens. Asymmetric flow compared to symmetric flow was found to have a negligible influence on the measured textures of the specimens studied. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/42954 |
| institution | University of Cape Town (South Africa) |
| language | English eng |
| last_indexed | 2026-06-10T12:33:08.525Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Centre for Materials Engineering |
| publisherStr | Centre for Materials Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/42954 The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour Duckham, Alan Knutsen, Robert D Materials Engineering Copper type shear band formation in AI-1 Mg and its influence on recrystallisation phenomena has been investigated. This study includes the development of a suitable plane strain compression (PSC) apparatus, and an analysis of the deformation and recrystallisation structures which evolve from a matrix of experiments incorporating temperature, strain and strain rate variables. A PSC test rig was purposely designed and built to facilitate the controlled high temperature deformation of aluminium specimens. The design of the apparatus ensured that strain distribution within a specimen is uniform while simultaneously limiting lateral spread. A small amount of lateral platen movement of the apparatus has been observed to cause asymmetric flow due to rotation of the plastic-rigid exit boundaries within the deforming specimens. Asymmetric flow compared to symmetric flow was found to have a negligible influence on the measured textures of the specimens studied. 2026-03-12T09:53:21Z 2026-03-12T09:53:21Z 1998 2024-07-11T08:35:10Z Thesis / Dissertation Doctoral PhD http://hdl.handle.net/11427/42954 en eng application/pdf Centre for Materials Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Materials Engineering Duckham, Alan The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| thesis_degree_str | Doctoral |
| title | The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| title_full | The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| title_fullStr | The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| title_full_unstemmed | The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| title_short | The formation of copper type shear bands in AL-1MG and their influence on recrystallisation behaviour |
| title_sort | formation of copper type shear bands in al 1mg and their influence on recrystallisation behaviour |
| topic | Materials Engineering |
| url | http://hdl.handle.net/11427/42954 |
| work_keys_str_mv | AT duckhamalan theformationofcoppertypeshearbandsinal1mgandtheirinfluenceonrecrystallisationbehaviour AT duckhamalan formationofcoppertypeshearbandsinal1mgandtheirinfluenceonrecrystallisationbehaviour |