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Study of the Microstructure of AZ31B Magnesium Alloy Under High Strain Rate Deformation

机译：高应变率变形下AZ31B镁合金的微观组织研究

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摘要

In order to investigate the microstructure evolution under high strain rate deformation of magnesium alloy, AZ31B magnesium alloy was impacted by Split Hopkinson Pressure Bar within the strain rates of 496s-1 to 2120s-1, then the specimens were observed by optical microscopy. The results show that when the strain rate are relatively low (496s-1-964s-1), the microstructure is predominated by high density of twinning, while increase the strain rate to 2120s-1 the volume fraction of twins is decreased. This implies that at relatively lower strain rate the deformation mechanism of AZ31B magnesium alloy under impact loading is twinning; increasing the strain rate the prismatic slip and pyramidal slip may be active besides twinning.
机译：为了研究镁合金在高应变率变形下的组织演变，在496s-1至2120s-1的应变率下，采用Split Hopkinson压杆对AZ31B镁合金进行了冲击，然后用光学显微镜观察了样品。结果表明，当应变速率较低时（496s-1-964s-1），孪晶的高密度占主导地位，而当应变速率提高到2120s-1时，孪晶的体积分数降低。这意味着在相对较低的应变速率下，AZ31B镁合金在冲击载荷下的变形机理是孪生的。增加应变率，除了孪晶之外，棱柱滑动和角锥滑动也可能是活跃的。

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  • 来源
  • 会议地点 Qingdao(CN)
  • 作者

    Mao Pingli; Liu Zheng; Wang Changyi; Wang Zhi;

  • 作者单位

    School of Materials Science and Engineering, Shenyang University of Technology,Shenyang 110870, China;

    School of Materials Science and Engineering, Shenyang University of Technology,Shenyang 110870, China;

    School of Materials Science and Engineering, Shenyang University of Technology,Shenyang 110870, China;

    School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TB346;
  • 关键词

    AZ31B magnesium alloy; high strain rate deformation; microstructure;

    机译：AZ31B镁合金；高应变率变形；显微组织;

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