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In-situ processing and aging behaviors of MgAl_2O_4 spinel whisker reinforced 6061 Al composite

机译:MgAl_2O_4尖晶石晶须增强6061 Al复合材料的原位加工和时效行为

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摘要

6061 aluminum-alloy matrix composites are drawing greater attention due to their low density, excellent mechanical properties and wear resistance. In this study, in-situ generated MgAl_2O_4 spinel whiskers reinforced 6061A1 alloy matrix composites were fabricated and solutionizing and age hardening treatment was performed on the composites in a temperature range of 160-210℃. The microstructure and mechanical properties of the composite were investigated and the influences of in-situ generated whiskers on aging behaviors of the composite were also discussed. The results show that the whiskers exhibit a homogeneous distribution with good interface bonding with the matrix. The hardness and ultimate tensile strength (UTS) increase with increasing content of the whisker, whereas the ductility decreases at the same time. The properties of the composites attained a peak value of 195 HV in hardness and 400 MPa in UTS after aging for 30 min at 190℃ Compared with the 6061A1 alloy, the presence of whiskers could accelerate the aging kinetics of composites due to the high density dislocations formed during the fabrication process.
机译:6061铝合金基复合材料由于其低密度,出色的机械性能和耐磨性而受到越来越多的关注。本研究制备了MgAl_2O_4尖晶石晶须增强的6061A1合金基体复合材料,并对复合材料在160-210℃的温度范围内进行固溶和时效硬化处理。研究了复合材料的微观结构和力学性能,并探讨了原位晶须对复合材料老化性能的影响。结果表明,晶须表现出均匀的分布,并与基质具有良好的界面结合。硬度和极限拉伸强度(UTS)随着晶须含量的增加而增加,而延展性同时降低。 190℃时效30分钟后,复合材料的性能达到了硬度最高为195 HV,UTS为400 MPa的峰值。与6061A1合金相比,晶须的存在由于高密度位错而加速了复合材料的时效动力学。在制造过程中形成的。

著录项

  • 来源
    《Materials Science and Engineering》 |2014年第26期|114-121|共8页
  • 作者单位

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China;

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China;

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China;

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

    Metal-matrix composites (MMCs); Age hardening; Mechanical characterization; Sintering;

    机译:金属基复合材料(MMC);时效硬化;机械特性烧结;

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