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<p>The analysis of deformation in titanium alloys, particularly the Ti6Al4V alloy, is important for industries like aerospace due to its lightweight nature and high strength. This study investigates the direct observation of microstructural development and deformation behavior of Ti6Al4V alloy under dynamic tensile stress at operating temperatures, revealing significant insights into its stress response. Advanced techniques such as electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) were used to investigate the interplay of mechanisms like grain boundary sliding (GBS), dynamic recrystallization (DRX), and <i>α-</i> and <i>β</i>-phase precipitation. This work provides a detailed analysis of the Schmid factor (SF) to illustrate the relationship between grain orientation and slip system activation, offering insights into deformation behavior across different strain rates. Additionally, the schematic representation offers a clear visualization of grain evolution before and after deformation, emphasizing transitions in grain boundary characteristics. The results indicate that GBS dominates at low strain rates, fostering superplasticity, while DRX refines the grain structure, enhancing mechanical stability at higher strain rates. The observed transition from high-angle to low-angle grain boundaries and the development of a preferred grain orientation further enhance the alloy's resilience and strength, paving the way for innovative applications.</p>

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Investigating Microstructure and Texture Evolution of Heat-Treated Ti6AI4V Alloy during Deformation Process

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Mujahid Abbas,
  • Junxia Lu,
  • Xiaopeng Cheng,
  • Chan Guo,
  • Vineet Tirth,
  • Ali Algahtani,
  • Abid Zaman

摘要

The analysis of deformation in titanium alloys, particularly the Ti6Al4V alloy, is important for industries like aerospace due to its lightweight nature and high strength. This study investigates the direct observation of microstructural development and deformation behavior of Ti6Al4V alloy under dynamic tensile stress at operating temperatures, revealing significant insights into its stress response. Advanced techniques such as electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) were used to investigate the interplay of mechanisms like grain boundary sliding (GBS), dynamic recrystallization (DRX), and α- and β-phase precipitation. This work provides a detailed analysis of the Schmid factor (SF) to illustrate the relationship between grain orientation and slip system activation, offering insights into deformation behavior across different strain rates. Additionally, the schematic representation offers a clear visualization of grain evolution before and after deformation, emphasizing transitions in grain boundary characteristics. The results indicate that GBS dominates at low strain rates, fostering superplasticity, while DRX refines the grain structure, enhancing mechanical stability at higher strain rates. The observed transition from high-angle to low-angle grain boundaries and the development of a preferred grain orientation further enhance the alloy's resilience and strength, paving the way for innovative applications.