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首页> 外文期刊>Materials Science and Engineering >Efficient microstructure refinement of Al-Si-Mg alloy manipulated by nanocrystals formed by in-situ crystallization in melt
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Efficient microstructure refinement of Al-Si-Mg alloy manipulated by nanocrystals formed by in-situ crystallization in melt

机译：通过原位结晶在熔体中形成的纳米晶体操纵Al-Si-Mg合金的高效细胞细胞

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摘要

Al-Si-Mg alloys manipulated by in-situ synthesized nanoparticles have been prepared by casting method in this work. The addition of different contents of refiners promoted the obvious grain refinement of the Al-Si-Mg alloys. It was found that 0.10 wt% refiners addition caused a significant and efficient refinement on a-Al (from 1675 mu m to 199 mu m) and Mg2Si in the inoculated Al-Si-Mg alloys. The morphology of the eutectic Si in the inoculated Al-Si-Mg alloys transformed from needle-like structure to a fibrous one, and the mean size sharply decreased (from 26.56 mu m to 11.89 mu m) and increased a little with the increase of FeBSi amorphous refiners content. Tensile property tests showed that both strength and ductility of the alloys were improved by the addition of FeBSi amorphous refiners. The yield strength, tensile strength, fracture strain and elongation of the alloy inoculated with 0.10 wt% FeBSi amorphous refiners for 20 min were 226 MPa, 343 MPa, 18.4% and 16.7%, compared to those of the uninoculated alloy (170 MPa, 289 MPa, 13.7% and 12.2%), respectively. It was found that the Fe2B and Fe3Si nano-sized particles which were crystallized from FeBSi amorphous refiner contributed to the grain refinement of alpha-Al, resulting in higher strength. Moreover, grain refinement shortened the atomic diffusion distance and refines Mg2Si. The grain refinement and spheroidization of eutectic Si enhance uniform deformation during tension, and reduce the possibility of crack initiation and expansion, thus improving the plasticity.
机译：通过原位合成纳米颗粒操纵的Al-Si-Mg合金通过铸造方法在这项工作中制备。添加不同含量的炼油厂促进了Al-Si-Mg合金的明显晶粒细化。发现0.10wt％的缩探剂添加在接种的Al-Si-Mg合金中对A-Al（1675μm至199μm）和Mg2Si产生显着和有效的细化。从针状结构转化到纤维状的接种Al-Si-Mg合金中共晶Si的形态，平均尺寸急剧下降（从26.56亩至11.89μm），随着增加的增加而增加FEBSI非晶炼油厂内容。拉伸性能试验表明，通过添加FeBSI无定形炼油厂的增强，改善了合金的强度和延展性。与未致密的合金（170MPa，289，289，170MPa，289，226MPa，343MPa，18.4％，18.4％，18.4％和16.7％，合金的屈服强度，拉伸强度，断裂菌株和伸长率为226MPa，343MPa，18.4％和16.7％ MPA，13.7％和12.2％）。发现从FEBSI无定形炼油厂结晶的Fe2B和Fe3Si纳米尺寸颗粒有助于α-Al的晶粒细化，导致更高的强度。此外，晶粒细化缩短了原子扩散距离并改善Mg2Si。共晶Si的晶粒细化和球化增强张力期间的均匀变形，降低了裂纹引发和膨胀的可能性，从而提高了可塑性。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|90-98|共9页
  • 作者

    Zhu Lin; Qiu Feng; Qiu Dong; Duan Tao-Tao; Chang Fang; Li Tao-Tao; Shu Shi-Li; Yang Hong-Yu; He Yang; Jiang Qi-Chuan;

  • 作者单位

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    RMIT Univ Sch Engn 115 Queensberry St Carlton Vic 3053 Australia;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jiangsu Univ Sci & Technol Sch Mat Sci & Engn Zhenjiang 212003 Jiangsu Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun Jilin Peoples R China|Jilin Univ Key Lab Automobile Mat Minist Educ Renmin St 5988 Changchun 130025 Jilin Peoples R China|Jilin Univ Dept Mat Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Al-Si-Mg alloy; Grain refinement; Spheroidization of eutectic Si; Lattice mismatch; Strengthening mechanism;

    机译：Al-Si-Mg合金;晶粒细化;共晶Si的球化;晶格错配;强化机制;

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