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Microstructures and mechanical properties of quasicrystal reinforced AZ31 matrix composites

机译：准晶增强AZ31基复合材料的组织和力学性能

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摘要

In order to improve the mechanical properties of AZ31 alloys, the repeated plastic working process was employed to fabricate the AZ31-based composites reinforced with stable icosahedral quasicrystal particles. The microstructure of the composites has been investigated by XRD, SEM, TEM and HREM, and their mechanical properties have also been studied. The results showed that the RPW process reduced the grain size significantly, and the average grain size was only about 500 nm after 200 cycles of RPW. A good metallurgical bond interface between the quasicrystal particles and the Mg matrix was found in their crystallographic orientation relationship of (1 010)_(Mg)//2-f. The composites exhibited the maximum yield tensile strength of 334 MPa and the maximum ultimate tensile strength of 372 MPa at room temperature, respectively. The enhanced mechanical properties were attributed to the strengthening effect of quasicrystal particles and the refined microstructure.
机译：为了改善AZ31合金的机械性能，采用重复的塑性加工工艺来制造由稳定的二十面体准晶体颗粒增强的AZ31基复合材料。通过XRD，SEM，TEM和HREM对复合材料的微观结构进行了研究，并对其力学性能进行了研究。结果表明，RPW工艺可显着减小晶粒尺寸，经过200次RPW循环后，平均晶粒尺寸仅为500 nm左右。准晶体颗粒与Mg基体的晶体取向关系为（1 010）_（Mg）// 2-f，具有良好的冶金结合界面。该复合材料在室温下分别显示出最大屈服拉伸强度为334 MPa和最大极限拉伸强度为372 MPa。增强的机械性能归因于准晶体颗粒的强化作用和精细的微观结构。

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  • 来源
    《Materials Science and Engineering》 |2011年第2011期|p.446-451|共6页
  • 作者

    Xudong Wang; Wenbo Du; Zhaohui Wang; Ke Liu; Shubo Li;

  • 作者单位

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

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  • 正文语种 eng
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  • 关键词

    Mg-Zn-Gd; icosahedral quasicrystalline; repeated plastic working (TPW) process; composite;

    机译：Mg-Zn-Gd;二十面体准晶体;重复塑性加工（TPW）工艺;复合材料;

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