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<p>It is a long-term contradiction for room-temperature ductility/formability and high-temperature creep strength in Mg alloys. For the sake of solving this problem without adding high-cost rare-earth elements, this study proposes using twin-roll casting (TRC) method for preparing commercial AZ31 Mg alloy. Common hot-rolling (HR) and recently popular cross-rolling (CR) methods are also performed for comparisons. The results reveal that the TRC sample owns the best synergy of room-temperature plasticity and high-temperature strength. Specifically, the weak rolling texture increases the Schmid factors for basal slip and promotes the ductility/formability of TRC sample. Meanwhile, the obvious solute segregation strengthens the grain boundaries and enhances the creep strength of TRC sample. Inversely, the strong rolling texture induces the poor ductility/formability of HR sample and the lack of solute segregation fails in enhancing the creep strength of CR sample. Therefore, the weak texture and the solute segregation are unveiled to be the two important factors for tailoring the room-temperature ductility/formability and high-temperature creep strength in the TRC-processed Mg alloys. The TRC method is expected to be widely utilized in producing Mg sheets with excellent comprehensive mechanical properties.</p> Graphical abstract <p></p>

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Achieving excellent combination of tensile ductility, stretch formability, and creep property in AZ31 Mg sheet via twin-roll casting

  • 期刊论文

  • 发表日期：

    2026年6月2日

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  • Chun Xi,
  • Sijia Hu,
  • Wanshun Zhang,
  • Lifei Wang,
  • Liuwei Zheng,
  • Qinghuan Huo

摘要

It is a long-term contradiction for room-temperature ductility/formability and high-temperature creep strength in Mg alloys. For the sake of solving this problem without adding high-cost rare-earth elements, this study proposes using twin-roll casting (TRC) method for preparing commercial AZ31 Mg alloy. Common hot-rolling (HR) and recently popular cross-rolling (CR) methods are also performed for comparisons. The results reveal that the TRC sample owns the best synergy of room-temperature plasticity and high-temperature strength. Specifically, the weak rolling texture increases the Schmid factors for basal slip and promotes the ductility/formability of TRC sample. Meanwhile, the obvious solute segregation strengthens the grain boundaries and enhances the creep strength of TRC sample. Inversely, the strong rolling texture induces the poor ductility/formability of HR sample and the lack of solute segregation fails in enhancing the creep strength of CR sample. Therefore, the weak texture and the solute segregation are unveiled to be the two important factors for tailoring the room-temperature ductility/formability and high-temperature creep strength in the TRC-processed Mg alloys. The TRC method is expected to be widely utilized in producing Mg sheets with excellent comprehensive mechanical properties.

Graphical abstract