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Superplastic Behaviour of an Mg-Ag-RE Magnesium Alloy

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Trojanová Z., Chiappa S., Málek P., Száraz Z., Lukáč P., Ryspaev T.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 4
765-767
EN
Fine-grained magnesium alloy QE22 (Mg-2.5wt.%Ag-2.5wt.%RE-0.6wt.%Zr) was prepared from cast ingot which was submitted to a two stages heat treatment. Subsequently the billet was overaged and extruded at high temperature. Samples were deformed at elevated temperatures from 380°C up to 480°C at various strain rates. Microstructure of deformed samples was studied using light and electron microscopy. Conditions for superplasticity of the investigated alloys have been estimated. Possible deformation mechanisms are discussed.
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