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Experiments were conducted to determine the influence of magnesium additions on grain refinement and tensile ductility in an Al-0.2% Sc alloy processed by equal-channel angular pressing (ECAP). The experiments show ECAP reduces the average grain size to within the range of ~0.70 to ~0.20 μm for alloys containing from 0 to 3% Mg but the as-pressed grain size increases to ~0.3 μm in an alloy with 5%...
An Al-3% Mg-0.2% Sc alloy was fabricated by casting and subjected to severe plastic deformation through equal-channel angular pressing to a strain of ~8. The grain size after pressing was ~0.2 μm and increased to -1.1 μm when holding at 673 K for 10 min. Very high tensile elongations were recorded at 673 K with a maximum elongation of ~2280% when testing with an initial strain rate of 3.3 x 10 ...
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