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The influences of long period stacking order phase and texture on compressive behavior of an extruded magnesium alloy

机译：长期堆积顺序相和织构对挤压镁合金压缩行为的影响

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摘要

The influences of long period stacking order phase and texture on compressive behavior of the extruded Mg-10Gd-2Y-0.5Zn-0.3Zr alloy are studied in the article. The results show that the peak stress and strain of the extruded alloy are 532 MPa andl3.8% and 483 MPa and 21.7%, in the 0° (extrusion direction) and 45° (inclined 45° to extrusion direction) orientation specimens, respectively, exhibiting obvious compressive anisotropy of mechanical properties. The long period stacking ordered phase has an important effect on the anisotropy of compressive mechanical properties due to the distribution of lamellar long period stacking ordered phases primarily aligned with the extrusion direction. A higher compressive strength is expected in 0° orientation specimens since it is more difficult to shear across long period stacking ordered phase than along the phase. Despite weak texture intensity, both the texture and the twin contribute partly to higher strength and peak strain in 0° and in 45° orientation specimens, respectively. The compression curve in 0° orientation specimens exhibits two-stage deformation behavior, which is related to the formation of limited new {1012} twinning and kinking of the long period stacking ordered phase in stage Ⅰ with smaller work hardening rate and the inhibition of twin deformation in stage Ⅱ with higher work hardening rate, respectively.
机译：研究了长期堆积顺序相和织构对挤压Mg-10Gd-2Y-0.5Zn-0.3Zr合金压缩行为的影响。结果表明，在0°（挤压方向）和45°（与挤压方向倾斜45°）取向的试样上，挤压合金的峰值应力和应变分别为532 MPa和13.8％，483 MPa和21.7％。 ，表现出明显的机械性能压缩各向异性。由于层状长周期堆积有序相的分布主要与挤压方向一致，因此长周期堆积有序相对压缩机械性能的各向异性具有重要影响。在0°取向的样品上预期会有更高的抗压强度，因为在长期堆积有序相上剪切比在相上剪切更困难。尽管质地强度较弱，但在0°和45°取向的试样中，质地和孪晶分别部分地有助于较高的强度和峰值应变。 0°取向试样的压缩曲线表现出两个阶段的变形行为，这与有限的新{1012}孪晶的形成和Ⅰ期长期堆积有序相的扭结有关，加工硬化率较小，并且对孪晶的抑制作用Ⅱ阶段的形变分别具有较高的加工硬化率。

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  • 来源
    《Materials Science and Engineering》 |2013年第15期|246-255|共10页
  • 作者

    X.Z. Han; W.C. Xu; L. Yuan; D.B. Shan;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Metals and alloys; Extrusion process; Texture; Microstructure; Mechanical properties;

    机译：金属和合金;挤出工艺;质地;微观结构机械性能;

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