The Quasi-static Compressive Behavior and Energy Absorption Properties of Mg-based Porous Materials
HAO Gang-ling1,2, HAN Fu-sheng2, WANG Wei-guo1
1. Institute of Materials Physics, College of Physics and Electronic Information, Yan'an University, Yan'an 716000, Shaanxi, China;
2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
Abstract:Porous Mg and porous AZ91D alloy were prepared using powder metallurgy method basing on space holding fillers. The porosity and pore size can be controlled in the range of 40%-80% and 0.5-2.0mm respectively. The investigation was carried out on the quasi-static compressive behavior and energy absorption properties of the Mg-based porous materials. The result shows that the compressive stress-strain curves were consisted of linear elastic region, plateau and densification region. The plateau region is serrated which indicates a brittle deformation mechanism. The dependence of yield strength on relative density can be understood in terms of Gibson-Ashby model, but the effect of pore size is small that can be neglectable. The energy absorption capacity of the Mg-based porous materials increases with the relative density increasing. Porous AZ91D alloy at the same conditions exhibits a higher energy absorption capacity than the porous Mg, that however represents a higher energy absorption efficiency than the porous AZ91D alloy.
郝刚领, 韩福生, 王伟国. 镁基多孔材料准静态压缩行为与吸能特性研究[J]. 材料工程, 2013, (2): 29-34.
HAO Gang-ling, HAN Fu-sheng, WANG Wei-guo. The Quasi-static Compressive Behavior and Energy Absorption Properties of Mg-based Porous Materials. Journal of Materials Engineering, 2013, (2): 29-34.
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