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首页> 外文期刊>Materials Science and Engineering >Anisotropic behavior studies of aluminum alloy 5083-H0 using a micro-tensile test stage in a FEG-SEM
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Anisotropic behavior studies of aluminum alloy 5083-H0 using a micro-tensile test stage in a FEG-SEM

机译：在FEG-SEM中使用微拉伸试验台研究铝合金5083-H0的各向异性行为

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摘要

The plastic anisotropic characteristics of aluminum alloy 5083-H0 at varying strain rates were investigated using uniaxial tensile testing inside an ultra-high resolution FEG-SEM. The stress strain graphs obtained show that for the rolling direction the mechanical properties decrease with increased strain rate from 0.1 to 0.5 mm/min. The transverse direction mechanical properties increase from 0.1 to 0.2 and decrease at 0.5 mm/min. Serrated yielding for both directions was more pronounced in the 0.1 mm/min and 0.2 mm/min than in 0.5 mm/min strain rate. The fracture surface was characterized by nucleation of micro-dimples of varying sizes and shapes, which became shallower with increasing strain rates. In-termetallic particles were observed in the large micro-dimples on the fractured surface. The micro-structure anisotropy revealed a shear type failure mode due to the shear bands localization for the 0° direction and for the 90° direction, failure mode showed both intergranular and shear type failure.
机译：使用单轴拉伸测试在超高分辨率FEG-SEM内研究了铝合金5083-H0在不同应变速率下的塑性各向异性特征。所获得的应力应变图表明，对于轧制方向，机械性能会随着应变速率从0.1到0.5 mm / min的增加而降低。横向机械性能从0.1增至0.2，并以0.5 mm / min的速度降低。在0.1 mm / min和0.2 mm / min时，两个方向的锯齿状屈服比在0.5 mm / min的应变速率中更为明显。断裂表面的特征是不同大小和形状的微凹坑成核，随着应变率的增加，凹坑变得越来越浅。在断裂表面的大微凹坑中观察到金属间颗粒。微观结构的各向异性显示出剪切型破坏模式，这是由于剪切带在0°方向和90°方向上的局部化，破坏模式同时显示了晶间和剪切型破坏。

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  • 来源
    《Materials Science and Engineering》 |2016年第22期|266-274|共9页
  • 作者

    Glenda T. Motsi; Mxolisi B. Shongwe; Tleyane J. Sono; Peter A. Olubambi;

  • 作者单位

    Institute for NanoEngineering Research, Tshwane University of Technology, Pretoria, South Africa,Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa;

    Institute for NanoEngineering Research, Tshwane University of Technology, Pretoria, South Africa,Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa;

    Council for Scientific and Industrial Research, Defence, Peace, Safety and Security, Pretoria, South Africa;

    Department of Chemical Engineering Technology, University of Johannesburg, Johannesburg, South Africa;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    In-situ SEM tensile test; Aluminum alloy; Anisotropy;

    机译：原位SEM拉伸试验;铝合金;各向异性;

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