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<p>This study focused on the development of high performance WE43 rare-earth magnesium alloy sheet by multi-pass hot rolling process, and discussed the influence of microstructure and mechanical properties of the sheet with the increasing rolling reduction (20%, 40%, 60%, 80%). Microstructure analysis was performed by optical microscopy (OM), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD), and mechanical properties were evaluated by tensile testing. The results showed that the grain size decreased and the average dislocation density increased with a higher rolling reduction. The sheet with 80% rolling reduction showed an ultimate tensile strength (UTS) of 311&#xa0;MPa, yield strength (YS) of 288&#xa0;MPa, and elongation (EL) of 6.7%, which were significantly higher than those of the sheet with 20% rolling reduction. The enhancement in strength is linked to fine grain strengthening and dislocation strengthening mechanisms. The recrystallization behavior of the plate provides the conditions for the improvement of its elongation, and the types of recrystallizations include twin-mediated recrystallization and particle stimulated nucleation. These findings demonstrate that the hot rolling process enhances the mechanical properties of WE43 alloy sheets, increasing strength while maintaining ductility, offering valuable insights for applying rolling technology to WE-series alloys.</p>

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Effect of Hot Rolling on Microstructure and Mechanical Properties of WE43 Rare-Earth Magnesium Alloy

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Weiyan Liu,
  • Xin Wang,
  • Wenbin Fang,
  • Boxin Wei,
  • Rengeng Li,
  • Xuewen Li,
  • Hao Wu,
  • Guohua Fan

摘要

This study focused on the development of high performance WE43 rare-earth magnesium alloy sheet by multi-pass hot rolling process, and discussed the influence of microstructure and mechanical properties of the sheet with the increasing rolling reduction (20%, 40%, 60%, 80%). Microstructure analysis was performed by optical microscopy (OM), scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD), and mechanical properties were evaluated by tensile testing. The results showed that the grain size decreased and the average dislocation density increased with a higher rolling reduction. The sheet with 80% rolling reduction showed an ultimate tensile strength (UTS) of 311 MPa, yield strength (YS) of 288 MPa, and elongation (EL) of 6.7%, which were significantly higher than those of the sheet with 20% rolling reduction. The enhancement in strength is linked to fine grain strengthening and dislocation strengthening mechanisms. The recrystallization behavior of the plate provides the conditions for the improvement of its elongation, and the types of recrystallizations include twin-mediated recrystallization and particle stimulated nucleation. These findings demonstrate that the hot rolling process enhances the mechanical properties of WE43 alloy sheets, increasing strength while maintaining ductility, offering valuable insights for applying rolling technology to WE-series alloys.