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
查看参考文献12篇
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文摘
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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。 |
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其他语种文摘
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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. |
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来源
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材料工程
,2013(2):29-34 【核心库】
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DOI
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10.3969/j.issn.1001-4381.2013.02.006
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关键词
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镁基多孔材料
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压缩行为
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吸能特性
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地址
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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
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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
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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一般工业技术;金属学与金属工艺 |
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基金
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陕西省自然科学基金
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陕西省教育厅自然科学基金
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延安市工业攻关专项
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陕西省高水平大学建设专项
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延安大学项目
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文献收藏号
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CSCD:4759257
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