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<p>To ascertain the ideal process parameters for the Ti-3Mo-6Cr-3Al-3Sn titanium alloy during forging, this study conducted hot compression experiments with deformation conditions of 720–870°C/0.0005–5&#xa0;s<sup>−1</sup>. The obtained flow stresses were corrected for friction coefficients, and both the processing hardening behavior and strain sensitivity were analyzed. Furthermore, an integrated hot processing map was constructed using four distinct flow instability criteria, scrutinized the microstructures in various regions of the hot processing map, and assessed the precision of this integrated map. The results indicate that the flow stresses after friction correction are lower than the experimental values. The processing hardening behavior diminishes with increasing true strain. The integrated hot processing map under various deformation conditions reveals that the establishment of the safe regions in the hot processing map is accurate, primarily characterized by finely equiaxed recrystallized grains and subgrains. The ideal deformation temperature for hot processing is identified to be between 735°C and 870°C, with strain rates of 0.0005–0.08&#xa0;s <sup>−1</sup>.</p>

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Study on Integrated Hot Processing Map of Ti-3Mo-6Cr-3Al-3Sn Titanium Alloy Based on Different Flow Instability Criteria

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Xuejia Liu,
  • Haoyu Zhang,
  • Yanxiang Zhang,
  • Yang Wang,
  • Feng Fang

摘要

To ascertain the ideal process parameters for the Ti-3Mo-6Cr-3Al-3Sn titanium alloy during forging, this study conducted hot compression experiments with deformation conditions of 720–870°C/0.0005–5 s−1. The obtained flow stresses were corrected for friction coefficients, and both the processing hardening behavior and strain sensitivity were analyzed. Furthermore, an integrated hot processing map was constructed using four distinct flow instability criteria, scrutinized the microstructures in various regions of the hot processing map, and assessed the precision of this integrated map. The results indicate that the flow stresses after friction correction are lower than the experimental values. The processing hardening behavior diminishes with increasing true strain. The integrated hot processing map under various deformation conditions reveals that the establishment of the safe regions in the hot processing map is accurate, primarily characterized by finely equiaxed recrystallized grains and subgrains. The ideal deformation temperature for hot processing is identified to be between 735°C and 870°C, with strain rates of 0.0005–0.08 s −1.