Thermal Conductivity of an AZ31 Sheet After Accumulative Roll Bonding

Abstract

Accumulative roll bonding (ARB) is one of methods of severe plastic deformation which is relevant for industrial production of sheets. While mechanical properties of several magnesium alloys subjected to ARB process have been studied, the physical properties have been reported only for some magnesium alloys. These properties are influenced by the texture developed during the ARB process and the temperature load. In the presented contribution, we studied thermal diffusivity and thermal conductivity of an AZ31 magnesium alloy after 1 and 2 passes through the rolling mill. Thermal diffusivity was measured with the laser-flash method in the temperature range between 20 and 350 °C. Thermal conductivity depends on the number of rolling passes. The microstructure and texture of sheets are significant factors influencing the thermal properties.

Effect of Rotary Swaging on Microstructure and Mechanical Properties of an AZ31 Magnesium Alloy

“…It is usually due to the texture developed in the deformed materials and anisotropy of the hexagonal Mg cell. The anisotropy can be manifested not only in mechanical properties but also in other physical properties such as thermal expansion, thermal conductivity, or internal friction . The microstructure and mechanical properties of pure magnesium submitted to RSW were studied by Gan et al They observed a refined inhomogeneous microstructure which varied from the center to surface of the samples.…”

“…The anisotropy can be manifested not only in mechanical properties [4][5][6][7] but also in other physical properties such as thermal expansion, [8] thermal conductivity, [9] or internal friction. [10] The microstructure and mechanical properties of pure magnesium submitted to RSW were studied by Gan et al [11] They observed a refined inhomogeneous microstructure which varied from the center to surface of the samples. Nevertheless, the yield stress and ultimate tensile strength increased, with a tendency to saturate, with increased amount of RSW deformation.…”