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Strength adjust mechanism of high toughness Al_4C_3/Al-xMg composites

机译：高韧性Al_4C_3 / Al-XMG复合材料强度调节机理

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摘要

In this paper, Al_4C_3 was in-situ synthesized in ALiCVAl-xMg (x = 0, 8 wt%) composites by liquid-solid reaction, the corresponding microstructure evolution and strength adjust mechanism were systematically studied. The Al_4C_3 particles in-sim generated in Al_4C_3/Al-xMg composites are both submicron and nanoscale. By adding 8 wt% Mg to Al_4C_3/Al composite, high content of Mg atoms dissolve in the matrix, which affects the distribution of Al_4C_3 and plays an active role in improving the mechanical properties. The ultimate tensile strength of the Al_4C_3/ Al-8Mg composites at room temperature increases from 171 MPa to 435 MPa, and the elongation still holds about 17.8%. The Brinell hardness was 105.8 HBW, 2.04 times higher than Al_4C_3/Al composite. What's more, the introduction of 8 wt% Mg weakens the fiber texture strength of Al_4C_3/Al composite, changes the preferred orientation from <111>_(Al)//ED to <100>_(Al)//ED, and increases the recrystallization fraction from 36.5% to 56.4%. Therefore, the work hardening ability of the Al_4C_3/Al-8Mg composites in the deformation process is significantly improved. This work provides a new perspective for designing high strength and toughness aluminum alloy strengthened by solid solution and in-situ nanoparticles simultaneously through liquid-solid method.
机译：本文通过液态固体反应，Al_4C_3以阿光胺-XMg（X = 0,8重量％）复合材料合成，系统地研究了相应的微观结构演化和强度调节机制。在AL_4C_3 / AL-XMG复合材料中产生的AL_4C_3颗粒是亚微米和纳米级。通过将8wt％Mg加入到Al_4C_3 / Al复合材料中，高含量的Mg原子溶解在基质中，这影响Al_4C_3的分布并在改善机械性能方面发挥积极作用。室温下的Al_4C_3 / Al-8Mg复合材料的极限拉伸强度从171MPa增加到435MPa，伸长率仍然具有约17.8％。 Brinell硬度为105.8 HbW，比Al_4C_3 / Al复合高2.04倍。更重要的是，引入8wt％mg削弱了Al_4c_3 / Al复合材料的纤维纹理强度，将优选的取向从<111>（al）//ed改变为<100> _（al）//ed，增加重结晶级分36.5％至56.4％。因此，显着改善了变形过程中Al_4C_3 / Al-8Mg复合材料的工作硬化能力。该作品提供了通过液体固体方法同时通过固体溶液和原位纳米颗粒增强的高强度和韧性铝合金的新视角。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|141842.1-141842.11|共11页
  • 作者

    Daoxiu Li; Kaiqi Hu; Mengxia Han; Kewei Xie; Guiliang Liu; Xiangfa Liu;

  • 作者单位

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University 17923 Jingshi Road Jinan 250061 PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University 17923 Jingshi Road Jinan 250061 PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University 17923 Jingshi Road Jinan 250061 PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University 17923 Jingshi Road Jinan 250061 PR China;

    Shandong Al & Mg Melt Tech Co. Ltd. PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University 17923 Jingshi Road Jinan 250061 PR China;

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

    Al matrix composites; Mg; Al_4C_3; Liquid-solid reaction; Mechanical properties;

    机译：Al矩阵复合材料;MG;al_4c_3;液体固体反应;机械性能;

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