Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2017;6:378-84 DOI: 10.1016/j.jmrt.2017.05.004
Original Article
Hardness evolution of AZ80 magnesium alloy processed by HPT at different temperatures
Saad A. Alsubaie, , Yi Huang, , Terence G. Langdon
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, United Kingdom
Received 11 April 2017, Accepted 11 May 2017
Abstract

Discs of an extruded AZ80 magnesium alloy were processed by high-pressure torsion (HPT) using 6.0GPa up to 10 turns at different temperatures (296K and 473K). The disc surfaces and cross-sectional planes were examined before and after processing using scanning electron microscopy (SEM) and Vickers microhardness (Hv). The microhardness results at the surface show differences in the strength of the material as a function of distance from the disc centres up to saturation, as well as a function of distance from the bottom to the surface in the cross-sectional plane. This study analyses the effect of processing temperature on the evolution of microhardness in the AZ80 magnesium alloy processed by high-pressure torsion.

Keywords
Hardness, High-pressure torsion, Magnesium alloy, Severe plastic deformation
J Mater Res Technol 2017;6:378-84 DOI: 10.1016/j.jmrt.2017.05.004