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首页> 外文期刊>Materials Science and Engineering >Effects of different external fields on the microstructure and mechanical properties of novel Al-Cu-Li alloy during twin-roll casting
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Effects of different external fields on the microstructure and mechanical properties of novel Al-Cu-Li alloy during twin-roll casting

机译：不同外场对双辊铸造过程中新型Al-Cu-Li合金微观结构和力学性能的影响

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摘要

The effects of different external fields on the microstructures and properties of twin-roll casting (TRC) 2099 Al-Li alloy sheets as well as their mechanism of action were investigated in detail. The serious central segregation of 2099 Al-Li alloy cast-rolled sheets is due to the unique properties of TRC process such as the high cooling intensity and the wide solidification range of 2099 alloy. The degree of central segregation and dendritic segregation of cast-rolled sheets abates significantly as well as the number of non-equilibrium eutectic phase decreases dramatically under the action of steady static magnetic field, pulse electric field and electromagnetic oscillation field during the TRC process. Especially, the improvement effect of electromagnetic oscillation field is the most remarkable. The electromagnetic stirring force to the mushy zone caused by electromagnetic oscillation field in TRC can not only reduce the temperature gradient and concentration gradient of solute ahead of the crystallizing front but also effectively increase the solute mixing capacity and solid solubility, which reduces the hardness difference along thickness direction and further improves the mechanical properties of the 2099 Al-Li alloy cast-rolled sheets.
机译：详细研究了不同外部场对双辊铸造（TRC）2099 Al-Li合金板的微观结构和性能的影响及其作用机理。 2099年Al-Li合金铸造卷板的严重中心偏析是由于TRC工艺的独特性能，例如高冷却强度和2099合金的宽凝固范围。在TRC过程中稳定静态磁场，脉冲电场和电磁振荡场的作用下，铸造卷板的中心偏析和树枝状分离的程度显着下降，并且在TRC过程中的稳态静态磁场，脉冲电场和电磁振荡场的作用下显着降低。特别是，电磁振荡场的改善效果是最显着的。由TRC中的电磁振荡场引起的糊状区的电磁搅拌力不仅可以降低溶质的温度梯度和浓度梯度，而且还有效地提高了溶质混合能力和固体溶解度，这降低了硬度差异厚度方向并进一步提高了2099 al-Li合金铸造轧制板的机械性能。

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  • 来源
    《Materials Science and Engineering》 |2019年第may29期|14-22|共9页
  • 作者

    Li Shiju; Jiang Tao; Wang Jinyuan; Chen Lizheng; Wei Bowen; Li Yang; Xu Guangming; Wang Zhaodong;

  • 作者单位

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Key Lab Electromagnet Proc Mat Minist Educ Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ State Key Lab Rolling & Automat Shenyang 110819 Liaoning Peoples R China;

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

    Twin-roll casting; 2099 Al-Li alloy; Segregation; External fields; Mechanical properties;

    机译：双辊铸造;2099 al-Li合金;隔离;外部领域;机械性能;

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