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<p>To reveal systematically the microstructure evolution, mechanical properties, and deformation mechanism of dual-phase Mg-Li alloy during rolling, the deformation behavior of the alloy was studied from different scales. The results show that the microstructure of the dual-phase Mg-Li alloy changes significantly after rolling, and the grain size of α-Mg phase and β-Li phase decreases obviously. The β-Li phase mainly produces {112} rolling texture and {112} copper texture, while the α-Mg phase mainly forms a plate-like texture parallel to the (0001) basal plane. The UTS and YS increase from 144.13 and 116.15&#xa0;MPa to 175.76 and 127.71&#xa0;MPa when the rolling reduction increases from 0 to 80%, while the elongation of the alloy increases first and then decreases and reaches the maximum when the rolling reduction was 20%, which was 32.07 %. The improvement of strength was mainly attributed to the combined effect of the grain refinement and work hardening effect. During the rolling, the β-Li phase was mainly plastically deformed by dynamic recovery and dislocation slip, while the α-Mg phase was mainly plastically deformed by dynamic recrystallization and dislocation slip.</p>

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Microstructure, Mechanical Properties, and Deformation Mechanism of Dual-Phase Mg-Li Alloy during Rolling

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Tao Wang,
  • Xin Cao,
  • Feng Zhong,
  • Xu Cheng,
  • Ming Liang,
  • Yanhui Liu,
  • Bing Wu,
  • Jianfeng Li

摘要

To reveal systematically the microstructure evolution, mechanical properties, and deformation mechanism of dual-phase Mg-Li alloy during rolling, the deformation behavior of the alloy was studied from different scales. The results show that the microstructure of the dual-phase Mg-Li alloy changes significantly after rolling, and the grain size of α-Mg phase and β-Li phase decreases obviously. The β-Li phase mainly produces {112} rolling texture and {112} copper texture, while the α-Mg phase mainly forms a plate-like texture parallel to the (0001) basal plane. The UTS and YS increase from 144.13 and 116.15 MPa to 175.76 and 127.71 MPa when the rolling reduction increases from 0 to 80%, while the elongation of the alloy increases first and then decreases and reaches the maximum when the rolling reduction was 20%, which was 32.07 %. The improvement of strength was mainly attributed to the combined effect of the grain refinement and work hardening effect. During the rolling, the β-Li phase was mainly plastically deformed by dynamic recovery and dislocation slip, while the α-Mg phase was mainly plastically deformed by dynamic recrystallization and dislocation slip.