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Effect of heat treatments on tensile properties and microstructures of wrought Mg?Zn?Zr-RE alloys
Authors:Z P Luo  S Q Zhang
Affiliation:(1) Beijing Institute of Aeronautical Materials, 100095 Beijing, China
Abstract:The effect of heat treatments on the tensile properties and microstructures of wrought Mg–Zn–Zr-Rare earth alloys MB25 and MB26 have been studied in this paper. It was shown that the homogenization of the cast ingots decreased the strength of the extruded bars because some grain boundary phases were dissolved during the process of this treatment, while the ageing treatment of the extruded bars increased the strength due to the dispersive precipitation of MgZn2 phase. The quenching + ageing treatments of the extruded bars decreases the strength and plasticity because of the growing up of the grains.Abbreviations ED electron diffraction - GB grain boundary - RE rare earth - TEM transmission electron microscope
Keywords:Mg alloy  microstructure  rare earth  tensile property
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