Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion
作者： Masaaki Kai , Zenji Horita , Terence G. Langdon
DOI: 10.1016/J.MSEA.2007.12.046
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摘要: Experiments were conducted on a Mg–9% Al alloy to evaluate the microstructural characteristics and tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) room temperature 423 K. Ultrafine grain sizes achieved samples in both an extruded cast condition. The results demonstrate viability of using HPT as technique for achieving significant refinement magnesium alloys which are not processed easily equal-channel angular pressing (ECAP). Superplastic ductilities testing 473 K with maximum measured elongation 810%. In general, higher superplastic elongations because development some limited internal cracking when temperature.
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