Production of Superplastic Mg Alloys Using Severe Plastic Deformation
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Published: 2002
Total Pages: 8
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DOWNLOAD EBOOKEqual-Channel Angular Pressing (ECAP) was conducted to refine grain size to the submicrometer level in three different Mg alloys having nominal compositions of Mg-O.6wt%Zr, Mg-9wt%Al and Mg-7.5wt%AI-O.2wt%Zr. It is shown that the grain refinement was successfully achieved when the alloys were subjected to extrusion prior to ECAP. Thermal stability of the fine-grained structures was examined by conducting static annealing experiment at various temperatures. Transmission electron microscopy was used for the observation of microstructures. Tensile tests were performed at elevated temperatures and it is shown that high-strain-rate and or low-temperature superplasticity was attained in the alloys subjected to ECAP.