jaue2016080: Influence of Heat Treatment on Internal Friction in Hot-rolled AZ31 alloy

Abstract

Magnesium and its alloys have a lot of good specific properties. One of them is damping capacity. However, damping capacity of magnesium is decreased, when alloying elements are added or deformation is conducted in order to enhance mechanical properties.The damping capacity was gradually influenced by microstructural factors. In this study, microstructure, damping capacity and texture were measuredto elucidate factors affected damping capacity. Specimens were cut out perpendicular to transverse direction from hot-rolled plate deformed at 673K.Subsequently, specimens were annealed at 623K and durations in the range from 30 to 180minutes..Significantly, different damping capacity was measured after heat treatment, with increasing temperature and time damping capacity increase. However, main component and intensity of texture were hardly changed.As a result in this study, it is concluded that damping capacity was satisfied dislocation mechanism and closely related to grain size.