Microstructural evolution of dilute Al–Mg alloys during processing by equal channel angular pressing and during subsequent annealing
| Autor: | Mª Antonia Muñoz-Morris, David G. Morris, C. García Oca, Gaspar González-Doncel |
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| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Materials science
Annealing (metallurgy) Mechanical Engineering Alloy Metallurgy Recrystallization (metallurgy) Recrystallization Work hardening engineering.material Condensed Matter Physics Microstructure Grain size Mechanics of Materials Severe plastic deformation engineering General Materials Science Grain boundary Grain boundary misorientation Submicron grains |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Equalchannelangularpressing (ECAP) is a materials processing method that allows very high strains to be imposed, leading to extreme work hardening and microstructural refinement, with minimal change of external sample dimensions. It offers possibilities of good mechanical properties, such as high strength and ductility, while allowing flexibility of choice of alloy composition for better corrosion behaviour, lower materials costs, and so on. The microstructure of an Al–3 wt.% Mgalloy is examined after processing by ECAP as well as its evolution during subsequent heat treatments for precipitation, recrystallization, or grain coarsening. Fine microstructures are produced by deformation which coarsen steadily on annealing. The nature of the grain boundaries after deformation and after annealing, as well as the grain sizes obtained, is reported. It is interesting to consider to what extent such heavy-deformation processing offers the possibility to achieve extremely fine grain sizes (towards the nano-scale) by the control of alloy composition, deformation conditions, and subsequent heat treatments We should like to thank J. Chao for assistance with the ECAP processing and C. Moreno for X-ray texture measurements |
| Databáze: | OpenAIRE |
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