镁基多孔材料准静态压缩行为与吸能特性研究
The Quasi-static Compressive Behavior and Energy Absorption Properties of Mg-based Porous Materials

郝刚领 ¹ 韩福生 ² 王伟国 ³

文摘	基于可去除填充颗粒的粉末冶金技术制备了孔隙率在40%~80%,孔径在1~2mm内变化的多孔镁和多孔AZ91D镁合金,并系统考察了材料的准静压压缩行为和吸能特性。结果发现,镁基多孔材料的压缩应力-应变曲线由线性弹性区、平台和致密化区域组成,但曲线锯齿状波动较大,表明材料的脆性断裂机制。压缩屈服强度与相对密度的关系可通过Gibson-Ashby模型来理解,但屈服强度对孔径的依赖性较低。吸能本领随相对密度的增加而增加,相同条件下,多孔AZ91D镁合金的吸能本领高于多孔镁,多孔镁的吸能效率则高于多孔AZ91D镁合金。
其他语种文摘	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.
来源	材料工程 ,2013(2):29-34 【核心库】
DOI	10.3969/j.issn.1001-4381.2013.02.006
关键词	镁基多孔材料 ; 压缩行为 ; 吸能特性
地址	1. 延安大学物理与电子信息学院材料物理研究所, 中国科学院材料物理重点实验室, 陕西, 延安, 716000 2. 中国科学院固体物理研究所, 中国科学院材料物理重点实验室, 合肥, 230031 3. 延安大学物理与电子信息学院材料物理研究所, 陕西, 延安, 716000
语种	中文
文献类型	研究性论文
ISSN	1001-4381
学科	一般工业技术;金属学与金属工艺
基金	陕西省自然科学基金 ; 陕西省教育厅自然科学基金 ; 延安市工业攻关专项 ; 陕西省高水平大学建设专项 ; 延安大学项目
文献收藏号	CSCD:4759257