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Volume 29 Issue 7
Jul.  2022

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Yuya Ishiguro, Xinsheng Huang, Yuhki Tsukada, Toshiyuki Koyama, and Yasumasa Chino, Effect of bending and tension deformation on the texture evolution and stretch formability of Mg–Zn–RE–Zr alloy, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1334-1342. https://doi.org/10.1007/s12613-021-2398-8
Cite this article as:
Yuya Ishiguro, Xinsheng Huang, Yuhki Tsukada, Toshiyuki Koyama, and Yasumasa Chino, Effect of bending and tension deformation on the texture evolution and stretch formability of Mg–Zn–RE–Zr alloy, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1334-1342. https://doi.org/10.1007/s12613-021-2398-8
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研究论文

弯曲变形和拉伸变形对Mg–Zn–RE–Zr合金织构演变和拉伸成形性能的影响

  • 通讯作者:

    Yuya Ishiguro    E-mail: ishiguro.yuya@e.nagoya-u.jp

  • 本文在初始具有横向 (TD) 分裂织构的 Mg–1.3wt%Zn–0.2wt%RE–0.3wt%Zr (ZEK100) 合金板材上进行了弯曲和拉伸变形,研究了弯曲和拉伸变形对试样织构形成和室温可成形性的影响。经受过3次弯曲和拉伸变形的试样表现出极好的 Erichsen 值,达到了 9.6 mm。然而,在经过7次变形的试样中,研究观察到 Erichsen 值的下降。随着变形次数的增加,样品表面上形成轧制方向的分裂织构。相反,清晰的横向分裂纹理保留在试样中心部分。结果表明,随着变形次数的增加,样品在宏观上形成了四极纹理。四极结构的形成降低了材料的各向异性,这是拉伸成形性提高的主要原因。相比之下,表面附近粗晶粒的产生是经受7次变形的试样拉伸成形性下降的直接原因。

  • Research Article

    Effect of bending and tension deformation on the texture evolution and stretch formability of Mg–Zn–RE–Zr alloy

    + Author Affiliations
    • Bending and tension deformations were performed on Mg–1.3wt%Zn–0.2wt%RE–0.3wt%Zr (ZEK100) alloy sheets that initially had a transverse direction (TD)-split texture. The effects of bending and tension deformations on the texture formation and room-temperature formability of specimens were investigated. The specimen subjected to 3-pass bending and tension deformations exhibited an excellent Erichsen value of 9.6 mm. However, the Erichsen value deterioration was observed in the specimen subjected to 7-pass deformations. The rolling direction-split texture developed on the surface with an increasing pass number of deformations. Conversely, the clear TD-split texture remained at the central part. As a result, a quadrupole texture was macroscopically developed with an increasing pass number of deformations. The reduction in anisotropy by the formation of the quadrupole texture is suggested to be the main reason for the improvement in stretch formability. By contrast, the generation of coarse grains near the surface is suggested to be the direct cause for the deterioration of the stretch formability of the specimen subjected to 7-pass deformations.

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