Effect of Deformation Route on Recrystallization Behaviour of 1100 Aluminum Sheet
| Autor: | Tetsuo Sakai, Kohki Mori, Hiroshi Utsunomiya |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Deformation (mechanics) Annealing (metallurgy) Mechanical Engineering Metallurgy chemistry.chemical_element Condensed Matter Physics Grain size Simple shear chemistry Mechanics of Materials Aluminium Shear stress General Materials Science Grain boundary In plane strain Composite material |
| Zdroj: | Materials Science Forum. 550:315-320 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.550.315 |
| Popis: | It is believed that the shear deformation superimposed on rolling deformation accelerates grain refinement. However, it has not yet been completely understood whether the grain refinement is due to the increase in amount of equivalent strain, or the change in strain path. In the present study, three different strain paths in plane strain - (1) simple shear, (2) compression and (3) the combination of simple shear and compression - are introduced into 1100 aluminum sheet. The recrystallization behaviours are compared. Plane-strain compression was achieved by a normal rolling, while the simple shear was achieved by a continuous ECAE (conshearing). The combined strain path was achieved by the conshearing subsequently followed by the rolling. The same amount of the equivalent strain of 1.28 was accumulated in the three paths. The ratio of shear strain to compressive strain was varied by three levels in the combined strain process. After heat treatment, the material processed by the combined strain path gave a finer recrystallized grain size than both of the monotonic strain paths at either annealing temperature. The finest recrystallized grain size was obtained at the shear strain ratio of 0.6 to the total equivalent strain. It was found that the change in strain path was effective for introducing more new high-angle grain boundaries. |
| Databáze: | OpenAIRE |
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