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首页> 外文期刊>Journal of Materials Research >Effect of SiC nanoparticles addition on the microstructures and mechanical properties of ECAPed Mg9Al-1Si alloy
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Effect of SiC nanoparticles addition on the microstructures and mechanical properties of ECAPed Mg9Al-1Si alloy

机译：SiC纳米颗粒的添加对ECAPed Mg9Al-1Si合金组织和力学性能的影响

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摘要

This study investigated the effects of 1 wt% SiC nanoparticles addition on the microstructures and mechanical properties of Mg9Al-1Si (wt%) alloy subjected to equal channel angular pressing (ECAP). Results showed that addition of SiC nanoparticles could refine matrix grain, Mg_(17)Al_(12) and Mg_2Si phase of as-cast alloy, but the Mg_(17)Al_(12) phase still exhibited network structure and the morphology of Mg_2 Si phase was still Chinese-script type. During the ECAP process, network Mg_(17)Al_(12) and Chinese-script shaped Mg_2Si phases were partially broken down into fine particles (～10 μm) and much finer particles (～2 μm) respectively. In particular, these Mg_(17)Al_(12) and Mg_2Si particles were uniform distribution in ECAPed Mg9Al-lSi-lSiC composite. The well-distributed particles and the existence of SiC nanoparticles could promote the formation of fine DRXed grains through enhanced grain boundary pinning. During tensile testing at room temperature, ECAPed Mg9Al-1Si- 1SiC composite exhibit optimal mechanical properties, the ultimate tensile strength and elongation to failure were reached to 255 Mpa and 7.9%, respectively. Furthermore, at elevated temperature of 150 ℃, the tensile strength and elongation to failure were considerably increased compared to an ECAPed, SiC-free Mg9Al-1Si alloy.
机译：这项研究调查了1wt％SiC纳米颗粒的添加对Mg9Al-1Si（wt％）合金在等通道角挤压（ECAP）下的组织和力学性能的影响。结果表明，添加SiC纳米颗粒可以细化铸态合金的基体晶粒，Mg_（17）Al_（12）和Mg_2Si相，但Mg_（17）Al_（12）相仍表现出网络结构和Mg_2Si的形态阶段仍然是中文脚本类型。在ECAP过程中，网络Mg_（17）Al_（12）和汉字形Mg_2Si相分别被部分分解为细颗粒（〜10μm）和细得多的颗粒（〜2μm）。特别地，这些Mg_（17）Al_（12）和Mg_2Si颗粒在ECAPed Mg9Al-1Si-1SiC复合材料中是均匀分布的。均匀分布的颗粒和SiC纳米颗粒的存在可以通过增强的晶界钉扎促进细DRXd晶粒的形成。在室温下的拉伸试验中，ECAPed Mg9Al-1Si-1SiC复合材料表现出最佳的机械性能，极限拉伸强度和断裂伸长率分别达到255 Mpa和7.9％。此外，与ECAPed，无SiC的Mg9Al-1Si合金相比，在150℃的高温下，抗拉强度和断裂伸长率显着提高。

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  • 来源
    《Journal of Materials Research》 |2017年第3期|615-623|共9页
  • 作者

    Wanhua Wang; Hongxia Wang; Yiming Liu; Huihui Nie; Weili Cheng;

  • 作者单位

    Shanxi Key Laboratory of Advanced Magnesium Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;

    Shanxi Key Laboratory of Advanced Magnesium Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;

    Shanxi Key Laboratory of Advanced Magnesium Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;

    Shanxi Key Laboratory of Advanced Magnesium Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;

    Shanxi Key Laboratory of Advanced Magnesium Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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