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Effect of initial grain size on the recrystallization and recrystallization texture of cold-rolled AA 5182 aluminum alloy

机译：初始晶粒度对冷轧AA 5182铝合金再结晶和再结晶织构的影响

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摘要

AA 5182 aluminum alloy with two different grain sizes was cold rolled to 71.2% reduction and then annealed at different temperatures for 3 h. The effect of initial grain size on the recrystallization and recrystallization texture of AA 5182 aluminum alloy was investigated. The fine-grained alloy recrystallized more rapidly than the coarsegrained alloy since initial grain boundaries were favored nucleation sites. Shear bands and transition bands were more readily formed in the coarse-grained alloy than in the fine-grained alloy. Inhomogeneous distribution of nuclei in the coarse-grained alloy led not only to a slow decrease of yield strength and ultimate tensile strength with increasing annealing temperature, but also to a marked inhomogeneity of recrystallized grains. The recrystallization texture of the fine-grained alloy was characterized by the R component and the cube orientation with some scattering about the rolling direction (RD) towards the Goss orientation, while the recrystallization texture of the coarse-grained alloy exhibited the 22.5° normal direction (ND) rotated cube orientation and the R' component deviated from the R component. The formation of 22.5° ND rotated cube and R' textures could be attributed to the inhomogeneous deformed microstructure and unique rolling texture.
机译：将具有两种不同晶粒尺寸的AA 5182铝合金冷轧至71.2％的压下率，然后在不同的温度下退火3小时。研究了初始晶粒尺寸对AA 5182铝合金再结晶和再结晶织构的影响。细晶粒合金的重结晶速度比粗晶粒合金快，因为初始晶界是成核点。与在细晶粒合金中相比，在粗晶粒合金中更容易形成剪切带和过渡带。粗晶合金中晶核的不均匀分布不仅导致屈服强度和极限抗拉强度随退火温度的升高而缓慢降低，而且导致重结晶晶粒明显不均匀。细晶粒合金的再结晶织构以R分量和立方取向为特征，并且在沿轧制方向（RD）向高斯取向的方向上有一些散射，而粗晶粒合金的再结晶织构表现为22.5°法向（ND）旋转立方体方向，并且R'分量偏离R分量。 22.5°ND旋转立方体和R'织构的形成可以归因于不均匀的变形微观结构和独特的滚动织构。

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  • 来源
    《Materials Science and Engineering》 |2017年第6期|233-243|共11页
  • 作者

    J.X. Zhang; M. Ma; W.C. Liu;

  • 作者单位

    Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China;

    Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China;

    Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Aluminum; Recrystallization; Microstructure; Texture; EBSD;

    机译：铝;重结晶;微观结构质地;EBSD;

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