Superplastic Behaviour of an Mg-Ag-RE Magnesium Alloy
Z. Trojanováa, S. Chiappa b, P. Málek a, Z. Száraza, P. Lukáč a and T. Ryspaev c
a Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
b Department of Mechanical Engineering, Marche Polytechnic University, Via Brecce Bianche, 60131-Ancona, Italy
c Kyrgyz State Technical University, Kyrgyz-German Technical Institute, Bishkek, Kyrgystan
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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.

DOI: 10.12693/APhysPolA.128.765
PACS numbers: 81.05.Bx, 62.20.fq