Damping characterization of magnesium matrix composites prepared by in-situ synthesis technique
来源期刊：中国有色金属学报(英文版)2005年第z3期
论文作者：张修庆 廖利华 马乃恒 王浩伟
文章页码：120 - 123
Key words：magnesium matrix composites； damping characterization； damping mechanism
Abstract: Magnesium alloy reinforced with 8% TiC(mass fraction) is in-situ synthesized using remelting and dilution technique. Damping capacity of AZ91 alloy and magnesium matrix composites was examined using Mark IV dynamic mechanical thermal analyzer. The results reveal that the damping capacity of materials is independent of frequency, but dependent on strain. Damping capacity of materials increase when testing strain enhances, and there is strain peak at damping-strain curve of materials. There are two temperature peaks at damping-temperature curve of magnesium matrix composites under 140℃ and 250℃ respectively. The damping mechanism is explained by dislocation motion, interface slip and grain boundary slip.
