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首页> 外文期刊>Materials Science and Engineering >Optimizing the mechanical properties of a Mg-Y-Nd-Zn-Zr alloy via interrupted compression with an intermediate annealing
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Optimizing the mechanical properties of a Mg-Y-Nd-Zn-Zr alloy via interrupted compression with an intermediate annealing

机译：通过中间退火的中断压缩优化Mg-Y-Nd-Zn-Zr合金的机械性能

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摘要

This work proposed a practical method, interrupted compression with an intermediate annealing, for optimizing the mechanical properties of Mg-4Y-2Nd-0.2Zn-0.5Zr alloy. This method contained the first compressive step for an interrupted strain of 0.25, the intermediate annealing for 5 min, and the second compressive step for a total true strain of 1.6. The temperatures for the two steps of hot compression and intermediate annealing were the same. The obtained sample was named IC sample. As a comparison, the continuous compression was also performed (CC sample). During hot compression, the work softening of the CC sample was dominated by the rotational dynamic recrystallization (rDRX) and the twin-assisted DRX (tDRX). With the strain increasing, the rDRX acted a more dominant role compared to the tDRX. In the IC sample, the intermediate annealing triggered the formation of deformation bands. During the second compressive step of the IC sample, the work softening was dominated by the DRX assisted by deformation bands besides the rDRX. As a result, the volume fraction of ultra-fine grains (V_(UFG)) was much higher in comparison to the CC sample. Compared to the grain size of UFGs (D_(UFG)) and the basal pole distribution, the V_(UFG) had a more important role in the resultant mechanical properties. The higher V_(UFG) of the IC sample led to the better combination of strength and ductility at each compressive temperature. Comparing the IC sample to the CC sample after compressing at temperatures from 420°C to 510°C, the increments of the UTS were 7.4%, 2.4%, 1.2% and 0.4%, and the increments of the FE were 4.0%, 13.9%, 22.8% and 21.3%. The interrupted compression with an intermediate annealing had a deep potential in applying to other Mg alloys despite the initial texture.
机译：这项工作提出了一种实用的方法，中间退火中断压缩，用于优化Mg-4Y-2nd-0.2Zn-0.5亿合金的机械性能。该方法含有用于0.25的中断应变的第一压缩步骤，中间退火5分钟，以及总真菌为1.6的总真菌的第二压缩步骤。热压缩和中间退火的两个步骤的温度是相同的。得到的样品被命名为IC样品。作为比较，还进行了连续压缩（CC样品）。在热压缩期间，CC样品的工作软化由旋转动态再结晶（RDRX）和双辅助DRX（TDRX）主导。随着应变的增加，与TDRX相比，RDX作用了更主导的作用。在IC样品中，中间退火引发了变形带的形成。在IC样品的第二压缩步骤期间，除了RDX之外，通过通过变形带辅助的DRX主导的工作软化。结果，与CC样品相比，超细晶粒的体积分数（V_（UFG））要高得多。与UFGS的晶粒尺寸（D_（UFG））和基底极分布相比，V_（UFG）在所得的机械性质中具有更重要的作用。 IC样品的较高V_（UFG）导致每个压缩温度的强度和延展性的较好组合。将IC样品在420℃至510℃的温度下压缩后将IC样品与CC样品进行比较，UTS的增量为7.4％，2.4％，1.2％和0.4％，Fe的增量为4.0％，13.9 ％，22.8％和21.3％。尽管初始质地，中间退火的中断压缩具有施加到其他Mg合金的深度。

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  • 来源
    《Materials Science and Engineering》 |2021年第22期|141102.1-141102.15|共15页
  • 作者

    Zhirou Zhang; Qinghuan Huo; Zhenyu Xiao; Yuxiu Zhang; Aki Hashimoto; Xuyue Yang;

  • 作者单位

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering School of Materials Science and Engineering Central South University Changsha 410083 China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering School of Materials Science and Engineering Central South University Changsha 410083 China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering School of Materials Science and Engineering Central South University Changsha 410083 China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering School of Materials Science and Engineering Central South University Changsha 410083 China;

    Technology Div. Nippon Paint Surf Chemicals Co. LTD. 4-1-15 Minamishinagawa Shinagawa-ku Tokyo 140-8675 Japan;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering School of Materials Science and Engineering Central South University Changsha 410083 China Nonferrous Metal Oriented Advanced Structural Materials and Manufacturing Cooperative Innovation Center Changsha 410083 China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Magnesium; Microstructure; Recrystallization; Texture;

    机译：镁;微观结构;重结晶;质地;

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