Deakin University

File(s) not publicly available

The hot working flow stress and microstructure in magnesium AZ31

conference contribution
posted on 2002-01-01, 00:00 authored by Aiden BeerAiden Beer, Matthew BarnettMatthew Barnett
The evolution of flow stress and microstructure for wrought magnesium alloy AZ31 was characterised using torsion and compression testing. Temperatures ranging between 300°C and 450°C and strain rates between 0.001 s -1 and 1 s -1 , were employed. Constitutive equations were developed for the flow stress at a strain of 1.0 for torsion, and 0.6 for compression. The flow stress was found to be strongly dependent on deformation mode at low strains. This can be explained in terms of the influence of the deformation accommodating processes of prismatic slip and dynamic recrystallisation (DRX). At higher strains, when the change in flow stress with strain is lower, the flow stress was relatively insensitive to deformation mode. Optical microscopy carried out on torsion samples quenched after twisting to strains between 0.2 and 2 revealed dynamically recrystallised (DRX) grains situated on pre-existing grain boundaries. The average grain size was reduced from 22.5μm down to 7.3 μm after a strain of 2, with the initial grain size being halved after a strain of 0.5.



The Minerals, Metals & Materials Society. Annual Meeting


193 - 198




Seattle, Washington

Start date


End date


Publication classification

EN.1 Other conference paper

Title of proceedings

Proceedings of the 131st Annual Meeting & Exhibition of The Minerals, Metals & Materials Society (TMS)

Usage metrics

    Research Publications


    No categories selected