Superplastic behaviour and microstructure evolution in a commercial ultra-fine grained Al-Mg-Sc alloy

An Al-6%Mg -0.3%Sc-0.3%Mn alloy was subjected to equal-channel angular extrusion (ECAE) at 325⁰C to a total strain of about 16 that resulted in an average grain size of about 1 µm. Superplastic properties and microstructural evolution of the alloy were studied in tension at strain rates ranging from 1.4x10־⁵ to 1.4 s־¹ in the temperature interval from 250⁰ to 500⁰CyesBelgorod State Universit