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Interfacial characteristics and mechanical asymmetry in A12024 matrix composites containing Fe-based metallic glass particles

机译：含有Fe系金属玻璃颗粒的A12024基质复合材料的界面特性和机械不对称

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摘要

Controversy regarding the possible effects of interfacial reaction between matrix and reinforcement has recently aroused in the field of aluminum matrix composites reinforced with metallic particles. In this study, Al2024 matrix composites containing Fe-based glass particles were heat treated to investigate the interfacial micro-structure and the resulting effects on the mechanical behavior. The results reveal that a submicron sized Al_7Cu_2Fe intermetallic phase is formed at the particle-matrix interface during solid solution treatment and the thickness of intermetallic layer increases with increasing temperature and holding time. The formation of the intermetallic phase reduces the amount of Cu available for the precipitation hardening of the matrix, consequently decreasing the strength of the composites. Furthermore, the formation of the intermetallic layer weakens the particle-matrix interface bonding strength, resulting in failure of the composites by particle debonding, which significantly deteriorated the tensile properties. Tension-compression (T/C) asymmetry of the composites is caused by the difference in damage evolution as a response to compressive or tensile loads. The composites containing large glass particles showed aggravated T/C asymmetry, and the asymmetry increased with the advancing of the interfacial reaction. Our work indicates that the formation of intermetallic compounds larger than submicron size at the interface is detrimental to the mechanical properties of aluminum matrix composites reinforced with metallic particles.
机译：最近在用金属颗粒加固的铝基基复合材料领域中引起了基质和增强件之间的界面反应可能影响的争议。在本研究中，含有Fe基玻璃颗粒的Al2024基质复合材料被热处理以研究界面微结构和对机械行为的产生影响。结果表明，在固溶处理期间在颗粒 - 基质界面处形成亚微米大小的Al_7Cu_2Fe金属间相，金属间层的厚度随着温度的增加而增加。金属间相的形成减少了用于基质的沉淀硬化的Cu的量，从而降低了复合材料的强度。此外，金属间层的形成削弱了粒子基质界面粘合强度，导致复合材料的颗粒剥离失效，这显着劣化了拉伸性能。复合材料的张力 - 压缩（T / C）不对称是由损伤演化的差异作为对压缩或拉伸载荷的响应引起的。含有大型玻璃颗粒的复合材料显示出加重的T / C不对称性，并且不对称随着界面反应的推进而增加。我们的作品表明，在界面处形成的金属间化合物大于亚微米尺寸的化合物对用金属颗粒加固的铝基复合材料的机械性能有害。

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  • 来源
    《Materials Science and Engineering》 |2020年第19期|139971.1-139971.10|共10页
  • 作者

    Tianbing He; Tiwen Lu; Nevaf Ciftci; Volker Uhlenwinkel; Weiping Chen; Kornelius Nielsen; Sergio Saldino;

  • 作者单位

    Leibniz IFW Dresden Institute for Complex Materials 01069 Dresden Germany;

    Leibniz IFW Dresden Institute for Complex Materials 01069 Dresden Germany Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of Technology Guangzhou Guangdong 510640 China;

    Leibniz Institute for Materials Engineering FWT 28359 Bremen Germany;

    Leibniz Institute for Materials Engineering FWT 28359 Bremen Germany University of Bremen Faculty of Production Engineering 28359 Bremen Germany;

    Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of Technology Guangzhou Guangdong 510640 China;

    Leibniz IFW Dresden Institute for Metallic Materials 01069 Dresden Germany TV Dresden Institute of Materials Science 01062 Dresden Germany TV Dresden Institute of Applied Physics 01062 Dresden Germany;

    Leibniz IFW Dresden Institute for Complex Materials 01069 Dresden Germany;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Aluminum matrix composite (AMC); Metallic glass (MG); Interfacial reaction; Tension-compression asymmetry; Intermetallic phase;

    机译：铝基质复合（AMC）;金属玻璃（Mg）;界面反应;张力 - 压缩不对称;金属间相阶段;

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