Grain Refinement of Extruded AZ31 Magnesium Alloy by Ecap Process
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Vysoká škola báňská - Technická univerzita Ostrava
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Abstract
Extruded Mg – 3%Al – 1% Zn (AZ31) magnesium alloy was subjected to ECAP (Equal Channel Angular Pressing) processing at 523 K (250 °C). At the processing temperature of 523 K, fine grains with the average grain size of 2 – 3 μm are formed as a result of dynamic recrystallization originated by fine Mg17Al12 (γ) phase particles having 200 nm diameter dynamically – precipitated during ECAP processing. Microstructural evolution during ECAP was studied systematically using optical microscope and transmission electron microscope.
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AZ31, EX – ECAP, optical microscopy, transmission electron microscopy, optická mikroskopie, transmisní elektronová mikroskopie
Citation
Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava. Řada strojní. 2017, roč. 63, č. 1, s. 31-37 : il.