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首页> 外文期刊>Materials Science and Engineering >Microstructure and texture evolution of Mg-Zn-Ce magnesium alloys sheets and associated restoration mechanisms during annealing
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Microstructure and texture evolution of Mg-Zn-Ce magnesium alloys sheets and associated restoration mechanisms during annealing

机译：Mg-Zn-Ce镁合金薄板的组织和织构演变及退火过程中的恢复机制

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摘要

The texture evolution in four Mg-Zn-Ce alloys was compared to that of Mg-3Al-1Zn (AZ31) alloy following rolling and subsequent isothermal annealing. All the as-cast and homogenized alloys were rolled through two stages that can be characterized as rough rolling and finish rolling, respectively. To investigate the effect of finish rolling temperature, one finish rolling pass with 65% reduction in thickness was performed at 300 ℃ and 450 ℃. Of the studied compositions, the Mg-1Zn-1Ce, which had the highest Ce/Zn ratio, showed the weakest as-rolled texture and homogenous shear banding/ twinning. Changing the Zn content changed particle size and, in alloys subject to texture weakening, the static recrystallization mechanism altered. On annealing, the maximum intensity of basal pole figures decreases as recrystallization progresses. The Mg-1Zn-1Ce (with the highest Ce/Zn), texture weakening is maintained even after full recrystallization, when grain coarsening occurs. However, in the Mg-4Zn-1Ce and AZ31 alloys, texture strengthening occurs when grain coarsening occurs, and the double split basal peak is replaced by a single peak. In these two alloys, grain coarsening is also accompanied by a bimodal grain size whereas in the Mg-1Zn-1Ce alloy, the grain coarsening leads to a uniform grain size. It is concluded that the differences between the Ce bearing alloys are related to Zn; increasing Zn decreases the solubility of Ce, which can influence the texture changes.
机译：在轧制和随后的等温退火之后，将四种Mg-Zn-Ce合金与Mg-3Al-1Zn（AZ31）合金的织构演变进行了比较。所有铸态合金和均质合金均经过两个阶段的轧制，分别可分为粗轧和精轧。为了研究精轧温度的影响，在300℃和450℃下进行了一次厚度减小65％的精轧道次。在所研究的成分中，具有最高Ce / Zn比的Mg-1Zn-1Ce表现出最弱的轧制织构和均匀的剪切带/孪晶。改变Zn的含量会改变颗粒尺寸，并且在合金中由于质地减弱而使静态再结晶机制发生变化。退火时，随着重结晶的进行，基极图形的最大强度降低。 Mg-1Zn-1Ce（具有最高的Ce / Zn），即使发生充分的再结晶（晶粒粗大化），也可以保持质地减弱。然而，在Mg-4Zn-1Ce和AZ31合金中，当发生晶粒粗化时会发生织构强化，并且将双分裂基峰替换为一个峰。在这两种合金中，晶粒粗化还伴随着双峰晶粒尺寸，而在Mg-1Zn-1Ce合金中，晶粒粗化导致晶粒尺寸均匀。可以得出结论，含铈合金之间的差异与锌有关。增加Zn会降低Ce的溶解度，这会影响织构变化。

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  • 来源
    《Materials Science and Engineering》 |2013年第20期|191-202|共12页
  • 作者

    M. Sanjari; S.F. Farzadfar; T. Sakai; H. Utsunomiya; E. Essadiqi; In-Ho Jung; S. Yue;

  • 作者单位

    Department of Materials Engineering, McGill University, Montreal, Canada H3A 2B2;

    Department of Materials Engineering, McGill University, Montreal, Canada H3A 2B2;

    Division of Materials and Manufacturing Science, Graduate School of Engineering, 2-1 Yamada-oka, Suita 565-0871, Japan;

    Division of Materials and Manufacturing Science, Graduate School of Engineering, 2-1 Yamada-oka, Suita 565-0871, Japan;

    Universite Internationale de Rabat (UIR) Technopolis, Rabat, Morocco;

    Department of Materials Engineering, McGill University, Montreal, Canada H3A 2B2;

    Department of Materials Engineering, McGill University, Montreal, Canada H3A 2B2;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    magnesium alloys; rare-earth; recrystallization; texture;

    机译：镁合金稀土重结晶质地;

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