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<p>This study investigates the impact of incorporating a shear zone during the direct extrusion process on the microstructure and mechanical properties of magnesium alloys. ZK60 magnesium alloys were fabricated using both conventional direct extrusion and direct extrusion continuous shear processes. The microstructural characteristics of the samples were meticulously analyzed using scanning electron microscopy and electron backscatter diffraction techniques, and the mechanical properties of the samples were systematically tested. The results demonstrate that introducing a shear zone significantly refines the grain size of the extruded ZK60 magnesium alloy, promotes the occurrence of dynamic recrystallization, and increases the proportion of recrystallized grains. It also modifies the texture characteristics of the magnesium alloy, enhancing the basal texture; improves the yield strength and tensile strength of the ZK60 magnesium alloy, increasing its elongation. This research provides novel insights and methodologies for optimizing the extrusion process of magnesium alloys, thereby facilitating their broader application in practical fields.</p>

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Enhanced Microstructures and Mechanical Properties of ZK60 Magnesium Alloy via Direct Extrusion with Continuous Shear Processing

  • 期刊论文

  • 发表日期：

    2025年4月21日

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  • Wenyu Du,
  • Yan Wang,
  • Yujiang Liu,
  • Yisong Zhou,
  • Xufeng Xie,
  • Huiling Zhang,
  • Xingdong Wang,
  • Zhihao Yi,
  • Hongjun Hu,
  • Wei Zhang

摘要

This study investigates the impact of incorporating a shear zone during the direct extrusion process on the microstructure and mechanical properties of magnesium alloys. ZK60 magnesium alloys were fabricated using both conventional direct extrusion and direct extrusion continuous shear processes. The microstructural characteristics of the samples were meticulously analyzed using scanning electron microscopy and electron backscatter diffraction techniques, and the mechanical properties of the samples were systematically tested. The results demonstrate that introducing a shear zone significantly refines the grain size of the extruded ZK60 magnesium alloy, promotes the occurrence of dynamic recrystallization, and increases the proportion of recrystallized grains. It also modifies the texture characteristics of the magnesium alloy, enhancing the basal texture; improves the yield strength and tensile strength of the ZK60 magnesium alloy, increasing its elongation. This research provides novel insights and methodologies for optimizing the extrusion process of magnesium alloys, thereby facilitating their broader application in practical fields.