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Microstructure and mechanical properties of selective laser melted magnesium

机译：选择性激光熔炼镁的组织和力学性能

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摘要

The effects of laser processing parameters on the microstructure and mechanical properties of selective laser-melted magnesium were investigated. The results show that the microstructure characteristics of the laser-melted samples are dependent on the grain size of SLM magnesium. The grains in the molten zone coarsen as the laser energy density increases. In addition, the average hardness values of the molten zone decreases significantly with an increase of the laser energy densities and then decreased slowly at a relatively high laser energy density irrespective of mode of irradiation. The hardness value was obtained from 0.59 to 0.95 GPa and corresponding elastic modulus ranging from 27 to 33 GPa. The present selective laser-melted magnesium parts are promising for biomedical applications since the mechanical properties are more closely matched with human bone than other metallic biomaterials.
机译：研究了激光加工参数对选择性激光熔炼镁组织和力学性能的影响。结果表明，激光熔融样品的微观结构特征取决于SLM镁的晶粒尺寸。随着激光能量密度的增加，熔融区的晶粒粗化。另外，熔融区的平均硬度值随着激光能量密度的增加而显着降低，然后在相对较高的激光能量密度下缓慢降低，而与照射方式无关。硬度值为0.59至0.95 GPa，相应的弹性模量为27至33 GPa。本发明的选择性激光熔化的镁零件对于生物医学应用是有前途的，因为其机械性能与人体骨骼相比，比其他金属生物材料更匹配。

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  • 来源
    《Applied Surface Science》 |2011年第17期|p.7447-7454|共8页
  • 作者

    C.C.Ng; M.M.Savalani; M.L.Lau; H.C.Man;

  • 作者单位

    Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;

    Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;

    Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong;

    Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnesium; selective laser melting; microstructure; mechanical properties; hardness;

    机译：镁;选择性激光熔化微观结构机械性能硬度;

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