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首页> 外文会议>Shape casting >EFFECTS OF Sr ON THE MICROSTRUCTURE OF ELECTROMAGNETICALLY STIRRED SEMI SOLID HYPOEUTECTIC Al-Si ALLOYS
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EFFECTS OF Sr ON THE MICROSTRUCTURE OF ELECTROMAGNETICALLY STIRRED SEMI SOLID HYPOEUTECTIC Al-Si ALLOYS

机译：锶对电磁搅拌半固态亚共晶Al-Si合金微观结构的影响

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摘要

The present study investigated the effects of Sr addition on the microstructure of semi-solid Al A356 alloy during electromagnetic stirring. Different amounts of Sr (0-300 ppm) were added to the alloy and the effect of Sr on eutectic nucleation and growth temperature of the eutectic silicon phase were determined. Also, effect of Sr addition on the characteristics of primary aluminum phase was determined using image analysis. The results indicate that addition of the Sr up to 90 ppm increased the solidification range (T_L-T_S) of the alloy and further addition of Sr decreased the value of T_L-T_S. Image analysis revealed that increasing of Sr up to 90 ppm increased the globularity (roundness) of primary aluminum particles. However, further addition of the Sr reduced the roundness of particles. Also, it was found that addition of Sr in all amounts increased the area percentage of primary aluminum particles compared to non-modified alloy. The mechanisms for changes in T_L-T_S, roundness and area percentage of primary aluminum phase are also discussed.
机译：本研究研究了Sr添加对电磁搅拌过程中半固态Al A356合金显微组织的影响。向合金中添加不同量的Sr（0-300 ppm），并确定Sr对共晶成核和共晶硅相生长温度的影响。另外，使用图像分析确定了Sr添加对初级铝相的特性的影响。结果表明，添加至多90 ppm的Sr会增加合金的凝固范围（T_L-T_S），而进一步添加Sr则会降低T_L-T_S的值。图像分析表明，将Sr增加到90 ppm会增加一次铝颗粒的球度（圆度）。然而，进一步添加Sr降低了颗粒的圆度。而且，发现与未改性合金相比，全部添加Sr增加了一次铝颗粒的面积百分比。还讨论了改变原铝相的T_L-T_S，圆度和面积百分比的机理。

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  • 来源
    《Shape casting》|2016年|133-140|共8页
  • 会议地点 Downtown Nashville TN(US)
  • 作者

    G. Eisaabadi B.; M. Nouri; R. Beygi; M. Zarezadeh Mehrizi; A. Nouri; M. Ebrahimi;

  • 作者单位

    Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;

    Shaid Rezvan Industry, Iran Aerospace Organization, Tehran, Iran;

    Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;

    Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;

    Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;

    Department of Chemical Engineering, Amir Kabir University of Technology, Tehran, Iran;

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

    Electromagnetic stirring; Semi solid; Al-Si alloys; Modification; Cooling Curve;

    机译：电磁搅拌；半固体；铝硅合金;修改;冷却曲线;

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