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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