Scholarlink

<p>This study focuses on the Mg-8Gd-0.5Sn-0.5Zr alloy and investigates the relationship between microstructural evolution and mechanical properties by controlling the bimodal grain structure through extrusion ratio. A range of analytical characterization techniques, including energy-dispersive spectroscopy (EDS), backscattered electron diffraction (EBSD), and electronic tensile testing, were employed. The research explores the heterogeneous deformation-induced strengthening (HDI) mechanism. The results show that after extrusion, the Mg-8Gd-0.5Sn-0.5Zr alloy formed a bimodal grain structure composed of unrecrystallized coarse grains (CGs) and dynamically recrystallized fine grains (FGs). By adjusting the extrusion ratio, the degree of dynamic recrystallization (DRX) could be controlled, thereby influencing the size and volume fraction of the coarse and fine grains. The SE10 alloy, with an extrusion ratio of 10:1, exhibited the optimal balance between the coarse and fine grain sizes and volume fractions (d<sub>CGs</sub>: d<sub>FGs </sub>≈ 2.83, V<sub>CGs</sub>: V<sub>FGs </sub>≈ 0.44), resulting in the most effective synergy between HDI and other strengthening mechanisms, as well as superior deformation coordination. This led to an ultimate tensile strength of 285.29&#xa0;MPa and an elongation of 16.48%, achieving a favorable balance of strength and ductility. This study provides theoretical and experimental support for the development of high-performance magnesium alloys through the control of heterogeneous structures via process parameters.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure and Mechanical Properties of Mg-8Gd-0.5Sn-0.5Zr Heterogeneous Magnesium Alloy Prepared by Controlling the Squeeze Ratio

  • 期刊论文

  • 发表日期：

    2026年7月17日

查看全文
  • Zhihua Wang,
  • Xiaoya Chen,
  • Zheng Wu,
  • Quanan Li

摘要

This study focuses on the Mg-8Gd-0.5Sn-0.5Zr alloy and investigates the relationship between microstructural evolution and mechanical properties by controlling the bimodal grain structure through extrusion ratio. A range of analytical characterization techniques, including energy-dispersive spectroscopy (EDS), backscattered electron diffraction (EBSD), and electronic tensile testing, were employed. The research explores the heterogeneous deformation-induced strengthening (HDI) mechanism. The results show that after extrusion, the Mg-8Gd-0.5Sn-0.5Zr alloy formed a bimodal grain structure composed of unrecrystallized coarse grains (CGs) and dynamically recrystallized fine grains (FGs). By adjusting the extrusion ratio, the degree of dynamic recrystallization (DRX) could be controlled, thereby influencing the size and volume fraction of the coarse and fine grains. The SE10 alloy, with an extrusion ratio of 10:1, exhibited the optimal balance between the coarse and fine grain sizes and volume fractions (dCGs: dFGs ≈ 2.83, VCGs: VFGs ≈ 0.44), resulting in the most effective synergy between HDI and other strengthening mechanisms, as well as superior deformation coordination. This led to an ultimate tensile strength of 285.29 MPa and an elongation of 16.48%, achieving a favorable balance of strength and ductility. This study provides theoretical and experimental support for the development of high-performance magnesium alloys through the control of heterogeneous structures via process parameters.