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<p>This study systematically investigated the influence mechanism of pre-compression and subsequent annealing (PCA) on the tensile mechanical properties of rolled Mg-Sn-Zn-Y alloy sheets. By integrating digital image correlation (DIC) with crystal plasticity finite element modeling (CPFEM), the regulatory role of PCA was revealed from multiple perspectives, including microstructural evolution, deformation mechanisms, and strain distribution. Results indicated that after PCA, the average grain size of the alloy increased from 12.67 to 21.26&#xa0;μm, while the texture transformed from a strong basal texture to a more dispersed orientation distribution, and the substructure fraction significantly increased to 91.52%. Regarding tensile properties, the tensile yield strength (TYS) dropped from 96.53 to 51.17&#xa0;MPa. In contrast, the ultimate tensile strength (UTS) and tensile elongation (TEL) increased to 271.04&#xa0;MPa and 30.8%, respectively, with elongation rising by 91.3%. CPFEM simulations and DIC strain analysis revealed that PCA promoted the activation of {10–12} tensile twinning and coordinated basal slip, significantly enhancing the uniform deformation capacity and necking resistance. This study achieved efficient enhancement of Mg alloy plasticity through the PCA. The multidimensional characterization using DIC and CPFEM provided an effective method for investigating deformation mechanisms in Mg alloys and offered theoretical support for optimizing application processes in rolled Mg alloy sheets.</p> Graphical Abstract <p></p>

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Unveiling the underlying mechanisms of pre-deformation on the tensile mechanical properties of Mg-Sn-Zn-Y alloy: insights from CPFEM modeling integrated with DIC testing

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Zhongzhi Zheng,
  • Yanfei Chen,
  • Fanrong Ai,
  • Zhengqiang Zhu,
  • M. Amir Siddiq,
  • Ke Li,
  • Zhigang Wang

摘要

This study systematically investigated the influence mechanism of pre-compression and subsequent annealing (PCA) on the tensile mechanical properties of rolled Mg-Sn-Zn-Y alloy sheets. By integrating digital image correlation (DIC) with crystal plasticity finite element modeling (CPFEM), the regulatory role of PCA was revealed from multiple perspectives, including microstructural evolution, deformation mechanisms, and strain distribution. Results indicated that after PCA, the average grain size of the alloy increased from 12.67 to 21.26 μm, while the texture transformed from a strong basal texture to a more dispersed orientation distribution, and the substructure fraction significantly increased to 91.52%. Regarding tensile properties, the tensile yield strength (TYS) dropped from 96.53 to 51.17 MPa. In contrast, the ultimate tensile strength (UTS) and tensile elongation (TEL) increased to 271.04 MPa and 30.8%, respectively, with elongation rising by 91.3%. CPFEM simulations and DIC strain analysis revealed that PCA promoted the activation of {10–12} tensile twinning and coordinated basal slip, significantly enhancing the uniform deformation capacity and necking resistance. This study achieved efficient enhancement of Mg alloy plasticity through the PCA. The multidimensional characterization using DIC and CPFEM provided an effective method for investigating deformation mechanisms in Mg alloys and offered theoretical support for optimizing application processes in rolled Mg alloy sheets.

Graphical Abstract