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等温锻造对碳化硅颗粒增强铝基复合材料断裂韧性的影响
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北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心,北京有色金属研究总院 国家有色金属复合材料工程技术研究中心

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TB333

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国家重点基础研究发展计划资助(项目号2012CB619606);国家高技术研究发展计划资助(项目号2013AA031201)


Effect of isothermal forging on fracture toughness of SiC particle reinforced aluminum matrix composite
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National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals,National Engineering Technology Research Center for Non-ferrous Metals Composites,General Research Institute for Non-ferrous Metals

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    摘要:

    本文开展了粉末冶金法制备的20%SiCp/2009Al复合材料坯锭的等温锻造实验,通过金相观察、扫描电镜(SEM)、拉伸和断裂韧性测试等方法研究了不同变形量对锻件微观组织和力学性能的影响。结果表明,随着等温锻造变形量的增大,SiC颗粒分布更加均匀,锻件的强度和塑性显著提高。通过SEM对材料断裂韧性裂纹扩展路径观察发现,主裂纹扩展发生在SiC颗粒偏聚区域的铝基体中。复合材料的断裂方式为以基体韧性断裂和增强体脆性断裂这两种方式为主。

    Abstract:

    20%SiCp/2009Al composites fabricated by powder metallurgy (PM) method were processed by isothermal forging in this paper, and the effects of different deformation on microstructure and mechanical properties were studied by optical microscopy, SEM, tensile and fracture toughness testing. The results show that, with the total strain increasing, distribution of SiC particles is better, the intensity and plasticity are significantly improved. The crack propagation paths of fracture toughness were observed by SEM, and the main crack occurred in the aluminum matrix where SiC particles agglomerated. The fracture mode of the composites combines mainly with toughness fracture of matrix and particle brittle fracture.

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魏少华,聂俊辉,刘彦强,左涛,郝心想,马自力,樊建中.等温锻造对碳化硅颗粒增强铝基复合材料断裂韧性的影响[J].稀有金属材料与工程,2017,46(11):3464~3468.[Wei Shaohua, Nie Junhui, Liu Yanqiang, Zuo Tao, Hao Xinxiang, Ma Zili, Fan Jianzhong. Effect of isothermal forging on fracture toughness of SiC particle reinforced aluminum matrix composite[J]. Rare Metal Materials and Engineering,2017,46(11):3464~3468.]
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  • 收稿日期:2015-08-02
  • 最后修改日期:2015-09-08
  • 录用日期:2015-10-15
  • 在线发布日期: 2017-12-13
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