| 铝含量对粉末冶金制备镁铝锆合金组织和力学性能的影响 |
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| 引用本文： | 费飞,刘子利,刘伯路,蒋晓冬.铝含量对粉末冶金制备镁铝锆合金组织和力学性能的影响[J].机械工程材料,2012(3):31-34. |
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| 作者姓名： | 费飞 刘子利 刘伯路 蒋晓冬 |
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| 作者单位： | 南京航空航天大学材料科学与技术学院 |
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| 基金项目： | 江苏省自然科学基金资助项目(BK2009577);江苏省科技支撑计划项目(BE2010103) |
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| 摘 要： | 运用粉末冶金工艺制备了Mg-xAl-1.5Zr(x=0,2,4,6,8,质量分数/%)合金,研究了铝含量对其组织和力学性能的影响。结果表明:镁铝锆合金主要由α-Mg基体、锆颗粒、β-Mg17Al12相组成,还存在一些微小的孔洞;铝含量的增加使合金组织趋于均匀化;Mg-6Al-1.5Zr合金具有最高的硬度和抗弯强度,分别为79.7HV和224MPa,但其塑性较差,断口呈准解理断裂的特征。
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| 关 键 词： | 镁铝锆合金 粉末冶金 硬度 抗弯强度 |
Effect of Al Contents on Microstructure and Mechanical Properties of Mg-Al-Zr Alloys Prepared by Powder Metallurgy |
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| FEI Fei,LIU Zi-li,LIU Bo-lu,JIANG Xiao-dong.Effect of Al Contents on Microstructure and Mechanical Properties of Mg-Al-Zr Alloys Prepared by Powder Metallurgy[J].Materials For Mechanical Engineering,2012(3):31-34. |
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| Authors: | FEI Fei LIU Zi-li LIU Bo-lu JIANG Xiao-dong |
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| Affiliation: | (College of Materials Science and Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Mg-xAl-1.5Zr alloys(x=0,2,4,6,8,mass fraction/%) were prepared by powder metallurgy technology.The effects of Al contents on microstructure and mechanical properties of the alloys were studied.The results show that Mg-Al-Zr alloys consisted of α-Mg matrix,Zr particles,β-Mg17Al12 phase and some microporosities.Increasing the Al content resulted in microstructure homogenizing of the alloys.Mg-6Al-1.5Zr had the highest microhardness and bending strength,up to 79.7 HV and 224 MPa,but its plasticity was poor,and the fracture showed a characteristic of quasi-cleavage fracture. |
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| Keywords: | Mg-Al-Zr alloy powder metallurgy hardness bending strength |
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