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Effect of orientation on self-organization of shear bands in 7075 aluminum alloy

机译：取向对7075铝合金剪切带自组织的影响

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摘要

The spatial distribution of shear bands was investigated in the rolled 7075 aluminum alloy through the thick-walled cylinder (TWC) technique with 0°, 90° and 45° angles between the aluminum alloy cylinder axial direction and the rolling direction. Self-organization of multiple adiabatic shear bands was observed in different orientation specimens and investigated by using Schmid factor theories. The experimental results indicated obvious differences in the morphology and self-organization of shear bands for the specimens. At the initial stage, the spacing of the shear bands in the 0° specimen is smaller than in the other specimens. The nucleation of the shear bands in the 90° specimen is early. Due to the shielding effect, fast-developed shear bands block the development of the neighboring smaller shear bands in the 90° specimen. The spacing of the shear bands in the 45° specimen is much larger than in the other specimens under the similar effective strain. At the late stage, a large number of shear bands nucleate in the 0' specimen, and the spacing of the shear bands is small. The shear bands in the 90° specimen are well-developed with obvious shielding effect and the largest spacing. The 45° specimen has the maximum average nucleation rate of the shear bands. Owing to the close Schmid factors of the slip systems of the 45° specimen, the spacing of the shear bands in the 45° specimen is still larger than in the 0° specimen.
机译：通过厚壁圆筒（TWC）技术研究了轧制7075铝合金中剪切带的空间分布，该厚壁圆筒在铝合金圆筒轴向与轧制方向之间的夹角为0°，90°和45°。在不同方向的标本中观察到了多个绝热剪切带的自组织，并使用施密特因子理论进行了研究。实验结果表明，试样剪切带的形貌和自组织明显不同。在初始阶段，0°试样中的剪切带间距小于其他试样。 90°试样中剪切带的形核较早。由于屏蔽作用，快速发展的剪切带阻碍了90°样品中相邻较小剪切带的发展。在相似的有效应变下，45°试样的剪切带间距远大于其他试样。在后期，大量剪切带在0'试样中形核，剪切带的间距很小。 90°试样中的剪切带发育良好，具有明显的屏蔽效果和最大的间距。 45°试样具有剪切带的最大平均成核速率。由于45°试样的滑动系统具有紧密的Schmid因子，因此45°试样中的剪切带间距仍大于0°试样中的剪切带间距。

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  • 来源
    《Materials Science and Engineering》 |2011年第6期|p.2446-2453|共8页
  • 作者

    Y. Yang; H.G. Zheng; Z.J. Shi; Q.M. Zhang;

  • 作者单位

    School of Materials Science and Engineering. Central South University, Changsha, 410083 Hunan, People's Republic of China,State Key Laboratory of Explosion Science and Technology, Beijing, People's Republic of China;

    School of Materials Science and Engineering. Central South University, Changsha, 410083 Hunan, People's Republic of China;

    School of Materials Science and Engineering. Central South University, Changsha, 410083 Hunan, People's Republic of China;

    State Key Laboratory of Explosion Science and Technology, Beijing, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    adiabatic shear band; self-organization; orientation; 7075 aluminum alloy;

    机译：绝热剪切带自组织取向;7075铝合金;

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