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首页> 外文期刊>Materials Science and Engineering >Effects of grain size on room temperature deformation behavior of Zn-22Al alloy under uniaxial and biaxial loading conditions
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Effects of grain size on room temperature deformation behavior of Zn-22Al alloy under uniaxial and biaxial loading conditions

机译：单轴和双轴加载条件下晶粒尺寸对Zn-22Al合金室温变形行为的影响

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摘要

Effects of grain size on room temperature (RT) deformation behavior of superplastic Zn-22Al alloy under uniaxial and biaxial loading conditions were investigated. Two-step equal channel angular pressing (ECAP) and subsequent annealing processes were applied to the alloy in order to obtain microstructures with various grain sizes ranging from submicron to micron sizes. Grain size of 200 nm was achieved after ECAP of the alloy, and it was increased up to ～ 2.60 μm by annealing at 250 ℃ for different time periods. Changes in deformation behaviors of the alloy with various grain sizes were found to be in good agreement under the uniaxial tensile and biaxial Erichsen test conditions. Increasing grain size decreased both the maximum elongation under uniaxial deformation and limiting dome height (LDH) under biaxial deformation. The high elongation to failure and LDH values for the samples with submicron grain size were attributed to their high strain rate sensitivity.
机译：研究了晶粒尺寸对单轴和双轴加载条件下超塑性Zn-22Al合金室温（RT）变形行为的影响。为了获得具有从亚微米到微米尺寸的各种晶粒尺寸的微结构，对合金进行了两步等通道角挤压（ECAP）和随后的退火工艺。合金的ECAP后达到200 nm的晶粒尺寸，并通过在250℃退火不同时间段使其增加到〜2.60μm。发现在单轴拉伸和双轴埃里克森试验条件下，具有各种晶粒尺寸的合金的变形行为的变化是一致的。晶粒尺寸的增加降低了单轴变形时的最大伸长率和双轴变形时的极限拱顶高度（LDH）。亚微米晶粒度样品的高断裂伸长率和LDH值归因于其高应变速率敏感性。

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  • 来源
    《Materials Science and Engineering》 |2016年第30期|78-87|共10页
  • 作者

    M.E. Cetin; M. Demirtas; H. Sofuoglu; OE.N. Cora; G. Purcek;

  • 作者单位

    Department of Mechanical Engineering, Karadeniz Technical University, Trabzon 61080, Turkey;

    Department of Mechanical Engineering, Karadeniz Technical University, Trabzon 61080, Turkey,Department of Mechanical Engineering, Bayburt University, Bayburt 69000, Turkey;

    Department of Mechanical Engineering, Karadeniz Technical University, Trabzon 61080, Turkey;

    Department of Mechanical Engineering, Karadeniz Technical University, Trabzon 61080, Turkey;

    Department of Mechanical Engineering, Karadeniz Technical University, Trabzon 61080, Turkey;

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  • 正文语种 eng
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  • 关键词

    Severe plastic deformation; Ultrafine grained structure; Formability; Superplastic Zn-22Al alloy;

    机译：严重的塑性变形;超细晶粒结构;可成型性超塑性Zn-22Al合金;

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