Títol:
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Microstructure, texture and tensile properties of ultrafine/nano grained magnesium alloy processed by accumulative back extrusion
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Autor/a:
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Fatemi Varzaneh, S. M; Zarei Hanzaki, A; Cabrera Marrero, José M.
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Altres autors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
Abstract:
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An AZ31 wrought magnesium alloy was processed by employing multipass accumulative back extrusion process. The obtained microstructure, texture and room temperature tensile properties were characterized and discussed. Ultrafine grained microstructure including nano grains were developed, where the obtained mean grain size was decreased from 8 to 0.5 µm by applying consecutive passes. The frequency of both low angle and high angle boundaries increased after processing. Strength of the experimental alloy was decreased after processing, which was attributed to the obtained texture involving the major component lying inclined to the deformation axis. Both the uniform and post uniform elongations of the processed materials were increased after processing, where a total elongation of 68 pct was obtained after six-pass deformation. The contribution of different twinning and slip mechanism was described by calculating corresponding Schmid factors. The operation of prismatic slip was considered as the major deformation contributor. The significant increase in post uniform deformation of the processed material was discussed relying on the occurrence of grain boundary sliding associated with the operation of prismatic slip. |
Matèries:
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-Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia -Magnesium -Magnesi |
Drets:
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Tipus de document:
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Article - Versió presentada Article |
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