Achievement of low temperature superplasticity in a commercial aluminum alloy processed by equal-channel angular extrusion

Abstract

Superplastic behavior of this alloy was examined in the temperature range 150-250°C at strain rates ranging from 1.4x10⁻⁵ to 5.6x10⁻² s⁻¹. The strain rate sensitivity was measured as ~0.32 at these conditions. This temperature is exceptionally low for superplasticity in Al-based alloys, as it has been reported to date. Features of superplastic deformation at such the low temperature are considered