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Static softening following multistage hot deformation of 7150 aluminum alloy: Experiment and modeling

机译：7150铝合金多阶段热变形后的静态软化：实验和建模

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摘要

Previous studies have demonstrated that the static softening kinetics of 7150 aluminum alloy showed typical sigmoidal behavior at 400 ℃ and softening plateaus at 300 ℃ (F.L. Jiang, et al., Mater. Sci. Eng. A, vol. 552, 2012, pp. 269-275). In present work, the static softening mechanisms, the microstructural evolution during post-deformation holding was studied by optical microscopy, scanning electron microscope, electron back-scattered diffraction and transmission electron microscopy. It was demonstrated that recrystallization is essentially absent during post-deformation holding, and that static recovery was the main contribution to static softening. Strain induced precipitation and coarsening caused softening plateaus at 300 ℃. In order to better understand the static softening mechanism, physically-based modeling, which integrated recovery and multicomponent particle coarsening modeling, was employed to rationalize the experimental results.
机译：先前的研究表明，7150铝合金的静态软化动力学在400℃时表现出典型的S形行为，在300℃时表现出软化的平稳状态（FL Jiang等，Mater。Sci。Eng。A，vol.552，2012，pp。 269-275）。在目前的工作中，通过光学显微镜，扫描电子显微镜，电子背散射衍射和透射电子显微镜研究了静态软化机理，变形后保持过程中的微观结构演变。已证明在变形后的保持过程中基本上不存在重结晶，并且静态回复是静态软化的主要作用。应变诱发的沉淀和粗化在300℃引起软化高原。为了更好地了解静态软化机理，采用了基于物理的建模方法，该方法将回收率和多组分颗粒粗化模型相结合，以合理化实验结果。

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  • 来源
    《Materials Science and Engineering》 |2015年第11期|164-177|共14页
  • 作者

    Fulin Jiang; Hatem S. Zurob; Gary R. Purdy; Hui Zhang;

  • 作者单位

    College of Materials Science and Engineering, Hunan University, Changsha 410082, China,Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamiltion, Ontario, Canada L8S 4L7;

    Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamiltion, Ontario, Canada L8S 4L7;

    Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamiltion, Ontario, Canada L8S 4L7;

    College of Materials Science and Engineering, Hunan University, Changsha 410082, China,Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha 410082, China;

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  • 正文语种 eng
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  • 关键词

    Aluminum alloy; Hot deformation; Static softening mechanism; Modeling; Recovery; Precipitation;

    机译：铝合金;热变形;静态软化机制;造型;复苏;沉淀;

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