The effect of coarse second-phase particles on the rate of grain refinement during severe deformation processing
| Autor: | Jacob R. Bowen, Philip B. Prangnell, P.J. Apps |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Polymers and Plastics Metallurgy Alloy Metals and Alloys engineering.material Microstructure Electronic Optical and Magnetic Materials visual_art Phase (matter) Ceramics and Composites Aluminium alloy visual_art.visual_art_medium engineering Severe plastic deformation Deformation (engineering) Electron backscatter diffraction Grain boundary strengthening |
| Zdroj: | Acta Materialia. 51:2811-2822 |
| ISSN: | 1359-6454 |
| Popis: | The effect of second-phase particles on the rate of grain refinement during severe deformation processing has been investigated, by comparing the microstructure evolution in an AA8079 aluminium alloy, containing 2.5 vol.% of ~2 μm particles, with that in a high purity, single-phase, Al-0.13% Mg alloy, deformed identically by ECAE to an effective strain of ten. The materials were analysed by high-resolution EBSD orientation mapping, which revealed that grain refinement occurred at a dramatically higher rate in the particle-containing alloy. A submicron grain structure could be achieved by an effective strain of only five in the particle-containing alloy, compared to ten in the single-phase material. The mechanisms that contribute to this acceleration of the grain refinement process are discussed. |
| Databáze: | OpenAIRE |
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