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Microstructure and mechanical properties of 2195 alloys prepared by traditional casting and spray forming

机译：通过传统铸造和喷雾成型制备的2195合金的组织和力学性能

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摘要

The 2195 alloys prepared by traditional casting and spray forming technology were investigated by using X-ray diffraction, X-ray microscopy, electron probe microanalyser, scanning electron microscopy, transmission electron microscopy and tensile testing. The results show that the as-cast alloy consisted of large-scale grains with sm`ll amount of pores, while the as-sprayed alloy is composed of mainly fine equiaxed grains with abundant pores. In the grain boundary, continuous secondary phases (Al-Cu-Mg phase, Al-Cu phase, and Al-Cu-Fe phase) exist in the as-cast alloy, while semi-continuous/discontinuous secondary phases (Al-Cu phase and Al-Cu-Fe phase) present in the as-sprayed alloy. The main phases in the grain interior of the as-cast alloy are T_1 (Al_2CuLi), T_B (Al_(7.5)Cu_4Li) and σ (Al_5Cu_6Mg_2) phases while T_1 and T_B phases for the as-sprayed alloy. The same homoge-nization treatment shows more solute contents dissolved in the spray formed 2195 alloy. The as-sprayed alloy has advantage of 35% in ultimate strength, 26% in yield strength and 54% in elongation compared to the as-cast alloy, respectively. This detailed studies manifest that subsequent processes of deformation and heat treatment for spray formed alloy need to be tailored based on its featured microstructure, compared with that of traditional cast alloy.
机译：通过使用X射线衍射，X射线显微镜，电子探针微脉粘剂，扫描电子显微镜，透射电子显微镜和拉伸试验来研究通过传统铸造和喷雾形成技术制备的2195合金。结果表明，铸造合金由带有SM的大型粒子组成，而喷涂合金主要由毛孔丰富的精细等型颗粒组成。在晶粒边界中，在铸造合金中存在连续的二次相（Al-Cu-Mg相，Al-Cu-Fe相），而半连续/不连续的次生相（Al-Cu相和al-Cu-Fe相）存在于喷涂合金中。铸造合金的晶粒内部的主要相是T_1（AL_2CULI），T_B（AL_（7.5）CU_4LI）和σ（AL_5CU_6MG_2）相，而T_1和作为喷涂合金的T_B相。相同的同性恋的治疗显示出溶解在喷雾中形成的更多溶质内容物2195合金。喷涂合金的优势在极限强度的优势，屈服强度的26％和54％的伸长率分别与铸造合金相比。该详细的研究表明，与传统铸造合金相比，需要根据其特定的微观结构定制喷雾形成合金的后续变形和热处理过程。

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  • 来源
    《Materials Science and Engineering》 |2020年第may15期|139337.1-139337.11|共11页
  • 作者

    Qingqing Pu; Zhihong Jia; Yaping Kong; Qingbo Yang; Zhiqing Zhang; Xi Fan; Hao Zhang; Lin Lin; Qing Liu;

  • 作者单位

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China;

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China Electron Microscopy Center of Chongqing University Chongqing 400044 China Key Laboratory for Light-weight Materials Nanjing Tech University Nanjing 210009 China;

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China;

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China;

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China;

    Jiangsu Haoran Spray Forming Alloy Co. Ltd Zhenjiang 212009 China;

    Jiangsu Haoran Spray Forming Alloy Co. Ltd Zhenjiang 212009 China;

    Southwest Aluminium (Group) Co. Ltd Chongqing 401326 China;

    International Joint Laboratory for Light Alloys (Ministry of Education) College of Materials Science and Engineering Chongqing University Chongqing 400044 China Key Laboratory for Light-weight Materials Nanjing Tech University Nanjing 210009 China;

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  • 正文语种 eng
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  • 关键词

    2195 alloy; Spray forming technology; Microstructure; Mechanical properties;

    机译：2195合金;喷雾成型技术;微观结构;机械性能;

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