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首页> 外文期刊>Materials science forum >Effect of hot extrusion on the microstructure of in-situ TiB_2 particulate reinforced magnesium matrix composite
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Effect of hot extrusion on the microstructure of in-situ TiB_2 particulate reinforced magnesium matrix composite

机译：热挤压对原位TiB_2颗粒增强镁基复合材料微观结构的影响

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摘要

The TiB_2/AZ31 magnesium matrix composite was fabricated via self-propagating high-temperature synthesis (SHS) and then hot extruded. The influence of hot extrusion on the microstructure and property of TiB_2/AZ31 composites was investigated. The results show that hot extrusion and synthesized TiB_2 particles could refine the grain size obviously. The synthesized TiB_2 particles are micro- and nano-sized, dispersing homogenously in the matrix. The interface between the matrix and the particles are good bonding. Meanwhile, slip and twinning are the main deformation modes during the hot extrusion. The fracture surface of hot-extruded TiB_2/AZ31 magnesium matrix composite has more dimples than the as-cast AZ31 magnesium alloy. The improvement of microstructure seems to be beneficial for the fracture ductility of TiB_2/AZ31 magnesium matrix composite.
机译：TiB_2 / AZ31镁基复合材料是通过自蔓延高温合成（SHS）制备的，然后进行热挤出。研究了热挤压对TiB_2 / AZ31复合材料组织和性能的影响。结果表明，热挤压和合成的TiB_2颗粒可以明显细化晶粒尺寸。合成的TiB_2颗粒为微米和纳米尺寸，均匀地分散在基质中。基质和颗粒之间的界面具有良好的粘结性。同时，滑移和孪生是热挤压过程中的主要变形方式。热挤压TiB_2 / AZ31镁基复合材料的断口比铸态AZ31镁合金的断口更多。显微组织的改善似乎有利于TiB_2 / AZ31镁基复合材料的断裂延展性。

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  • 来源
    《Materials science forum》 |2011年第1期|p.473-476|共4页
  • 作者

    N.N. Wu; C.F. Fang; Y. Bai; L.G. Meng; H. Hao; X.G. Zhang;

  • 作者单位

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    magnesium matrix composite; self-propagating high-temperature synthesis (SHS); TiB_2 particle; Hot-extrusion;

    机译：镁基复合材料;自蔓延高温合成（SHS）;TiB_2颗粒;热挤压;

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