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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Deformation banding and static recrystallization in high-strain-rate-torsioned Al-Mg alloy
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Deformation banding and static recrystallization in high-strain-rate-torsioned Al-Mg alloy

机译：高应变率掺环Al-Mg合金中的变形条带和静态重结晶

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Via applying torsion tests at various strain rates, we investigate the formation of deformation bands during cold deformation and static recrystallization post the subsequent annealing of Al-Mg alloy. High-strain-rate deformations exhibit noticeable variations: high flow stress at low strains, high Schmid factor, and accelerated SRX upon subsequent annealing. We determine that the variations originate from strongly formed DBs in the high-strain-rate deformed sample. Strain analysis based on electron back-scatter diffraction and convolutional multiple whole profile methods indicate that most DBs exhibit strain accumulation near their boundaries, which can accelerate SRX upon annealing. In addition, some DBs with low dislocation densities remain in the annealed workpieces. The DBs share the < 111 > rotation axis with the parent crystal and are generally visible in the shear-plane-normal//< 111 >-oriented crystal. Consequently, coincidence lattice site boundaries sharing the < 111 > rotation axis are observed in strain-free DBs. (C) 2019 Elsevier B.V. All rights reserved.
机译：通过以各种应变速率施加扭转试验，我们研究了冷变形和静态再结晶期间变形带的形成，静态再结晶术后Al-Mg合金的退火。高应变率变形表现出明显的变化：在随后的退火时，低菌株，高肌体因子和加速Srx的高流量应力。我们确定变型来自强菌速率变形样品中的强烈形成的DBS。基于电子背散射衍射和卷积多个整体轮廓方法的应变分析表明，大多数DBS在其边界附近表现出应变累积，这可以在退火时加速SRX。此外，一些具有低位脱位密度的DBS留在退火工件中。 DBS与母晶共享<111>旋转轴，并且通常在剪切平面正常// <111>晶体中可见。因此，在无应变的DBS中观察到共享<111>旋转轴的重合格子位点边界。 （c）2019 Elsevier B.v.保留所有权利。

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