Plastic Work to Heat Conversion During High-Strain Rate Deformation of Mg and Mg Alloy

Magnesium and magnesium alloy were investigated for plastic work to heat conversion (beta). Thermomechanical response was measured employing the shear-compression specimen geometry, a split-Hopkinson pressure bar, and an infra-red detector. beta of both materials measured to be less than the common assumption of 0.9; however, heat conversion was observed to be greater for magnesium alloy. Thus, results suggest that alloying and grain size refinement not only improved yield strength but also affected the thermomechanical response. (C) The Minerals, Metals & Materials Society and ASM International 2016