Scholarlink

<p>In this study, isothermal hot compression tests were conducted on solid-solution-treated novel Mg-3.3Gd-2.5Nd-0.4Zn-0.3Zr alloy across 370–490 °C and 0.001–1 s<sup>−1</sup> to establish reliable processing guidelines. Experimental flow stresses were modeled via a hyperbolic sine constitutive equation, while processing maps generated through the dynamic material model (DMM) identified two optimal thermomechanical windows: 370–490 °C and 0.001–0.03 s<sup>−1</sup>, 430–490 °C and 0.03–0.37 s<sup>−1</sup>. Microstructural analysis at ε=0.3 revealed discontinuous dynamic recrystallization (DDRX) as the dominant softening mechanism in stable regions. Adjacent to instability zones, concurrent DDRX and continuous dynamic recrystallization (CDRX) occurred with deformation twinning, accompanied by &lt;0001&gt;//CD texture evolution that suppressed basal slip. Transmission electron microscopy (TEM) observations demonstrated that dynamically precipitated second phases accelerated recrystallization via particle-stimulated nucleation (PSN), with finer and more abundant precipitates at 410 °C than at 450 °C.</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

Study on the hot deformation behavior of solution-treated novel Mg-3.3Gd-2.5Nd-0.4Zn-0.3Zr alloy using constitutive analysis and processing map

  • 期刊论文

  • 发表日期：

    2026年2月26日

查看全文
  • Nanjiang Chen,
  • Liwei Lu,
  • Ruicheng Mao,
  • Yuze Xi,
  • Shaohui Xiong,
  • Gang Liu,
  • Lifei Wang,
  • Yujuan Wu

摘要

In this study, isothermal hot compression tests were conducted on solid-solution-treated novel Mg-3.3Gd-2.5Nd-0.4Zn-0.3Zr alloy across 370–490 °C and 0.001–1 s−1 to establish reliable processing guidelines. Experimental flow stresses were modeled via a hyperbolic sine constitutive equation, while processing maps generated through the dynamic material model (DMM) identified two optimal thermomechanical windows: 370–490 °C and 0.001–0.03 s−1, 430–490 °C and 0.03–0.37 s−1. Microstructural analysis at ε=0.3 revealed discontinuous dynamic recrystallization (DDRX) as the dominant softening mechanism in stable regions. Adjacent to instability zones, concurrent DDRX and continuous dynamic recrystallization (CDRX) occurred with deformation twinning, accompanied by <0001>//CD texture evolution that suppressed basal slip. Transmission electron microscopy (TEM) observations demonstrated that dynamically precipitated second phases accelerated recrystallization via particle-stimulated nucleation (PSN), with finer and more abundant precipitates at 410 °C than at 450 °C.