Scholarlink

<p>The hot deformation behavior and microstructural evolution of a near-α TC30 alloy were systematically investigated under uniaxial compression at 960&#xa0;°C. The alloy exhibited rapid work hardening followed by continuous dynamic softening after the peak stress, without a clear steady-state plateau under the present deformation condition. Microstructural analysis revealed pronounced refinement of the α phase, with the average α grain size decreasing from 4.404&#xa0;μm to about 0.77–0.80&#xa0;μm after deformation. EBSD analysis suggests that continuous dynamic recrystallization contributes to grain refinement, together with dynamic recovery and lamellar fragmentation. Local globularization of the lamellar α phase was observed during deformation and may be associated with interface separation and β-phase penetration. This process, together with lamellar fragmentation and deformation-induced reorientation, contributes to local microstructural refinement and partial homogenization. Texture evolution analysis showed non-monotonic changes in the &lt; 0001 &gt; orientation during compression, which were mainly associated with slip-mediated grain rotation, lamellar reorientation, dynamic recovery, and fragmentation of the α phase. These findings provide insights into the deformation mechanisms of near-α titanium alloys and offer guidance for microstructure control during hot working processes.</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

High-temperature compression testing and microstructural characterization of near-α titanium alloy TC30 for flow-forming applications

  • 期刊论文

  • 发表日期：

    2026年7月24日

查看全文
  • Kai Tang,
  • Bobo Lu,
  • Lin Zhang,
  • Gang Yang,
  • Junming Fan,
  • Qixiong Zhou,
  • Xiong Luo

摘要

The hot deformation behavior and microstructural evolution of a near-α TC30 alloy were systematically investigated under uniaxial compression at 960 °C. The alloy exhibited rapid work hardening followed by continuous dynamic softening after the peak stress, without a clear steady-state plateau under the present deformation condition. Microstructural analysis revealed pronounced refinement of the α phase, with the average α grain size decreasing from 4.404 μm to about 0.77–0.80 μm after deformation. EBSD analysis suggests that continuous dynamic recrystallization contributes to grain refinement, together with dynamic recovery and lamellar fragmentation. Local globularization of the lamellar α phase was observed during deformation and may be associated with interface separation and β-phase penetration. This process, together with lamellar fragmentation and deformation-induced reorientation, contributes to local microstructural refinement and partial homogenization. Texture evolution analysis showed non-monotonic changes in the < 0001 > orientation during compression, which were mainly associated with slip-mediated grain rotation, lamellar reorientation, dynamic recovery, and fragmentation of the α phase. These findings provide insights into the deformation mechanisms of near-α titanium alloys and offer guidance for microstructure control during hot working processes.