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Microstructure evolution of Cu-0.2Mg alloy during continuous extrusion process

机译:连续挤压过程中Cu-0.2Mg合金的组织演变

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摘要

In this study, scanning electron microscope, electron backscatter diffraction, and transmission electron microscope have been used to investigate the microstructure evolution of Cu-0.2Mg alloy during continuous extrusion in mass production. The continuous extrusion could change the size and orientation of as-cast crystallite grains of the alloy. Hardness increased gently in upsetting zone and dropped sharply in adhesion zone. Hardness reached the maximum value in right-angle bending zone; and it decreased rapidly in extending extrusion zone. Upsetting zone was mainly composed of cell blocks and microbands, and adhesion zone mainly consisted of discontinuous recrystallize grain. Shear band and subgrains were formed in right-angle bending zone due to polygonization during shear deformation. In extending extrusion zone and extrusion rod zone, recrystallize microstructures were predominant.
机译:在这项研究中,已使用扫描电子显微镜,电子反向散射衍射和透射电子显微镜研究Cu-0.2Mg合金在连续生产过程中的连续挤压过程中的微观组织演变。连续挤压可以改变合金的铸态晶粒的尺寸和方向。硬度在up粗区缓慢增加,而在粘着区急剧下降。直角弯曲区的硬度达到最大值;在延伸挤压区迅速下降。 setting陷区主要由晶胞块和微带组成,粘附区主要由不连续的重结晶晶粒组成。由于剪切变形过程中的多边形化,在直角弯曲区域形成了剪切带和亚晶粒。在延伸挤压区和挤压棒区,重结晶的微观结构占主导。

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  • 来源
    《Journal of Materials Research》 |2015年第18期|2783-2791|共9页
  • 作者单位

    School of Materials Science and Engineering, Central South University, Changsha 410083, China China Railway Construction Electrification Bureau Group Kang Yuan New Materials CO., LTD, Jiangyin 214521, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Changsha 410083, 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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  • 正文语种 eng
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