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<p>The dynamic recrystallization (DRX) behavior of TC31 titanium (Ti) alloy was studied at 840–960&#xa0;°C and 0.0001–0.1&#xa0;s<sup>−1</sup>. The results showed that the volume fraction of recrystallized grain increased and the dislocation density gradually decreased with the strain increasing. The influence of strain rate on the critical dislocation density of DRX was greater than that of temperature, the strain rate was 0.001&#xa0;s<sup>−1</sup> at 920&#xa0;°C, and the critical dislocation density was 3.3 × 10<sup>14</sup>&#xa0;m<sup>−2</sup>. The DRX behavior was carried out in a smaller strain rate range through a dynamic softening map, and the deformation temperature range was in a similar pattern with normal distribution. The volume fraction of DRX could be validly predicted by the JMAK model, the value of R was 0.995, and the value of the root mean-squared error (RMSE) was 2.96%.</p> Graphical abstract <p>Figure <InternalRef RefID="Fig1">1</InternalRef> shows the microstructure, hot deformation dynamic softening map, and predicted results of TC31 titanium alloy.</p> <p></p>

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Dynamic recrystallization mechanism and model of TC31 titanium alloy sheet during hot deformation

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Hongzhao Li,
  • Dipeng Wu,
  • Haojie Jiang,
  • Wenbin Chen,
  • Minghe Chen

摘要

The dynamic recrystallization (DRX) behavior of TC31 titanium (Ti) alloy was studied at 840–960 °C and 0.0001–0.1 s−1. The results showed that the volume fraction of recrystallized grain increased and the dislocation density gradually decreased with the strain increasing. The influence of strain rate on the critical dislocation density of DRX was greater than that of temperature, the strain rate was 0.001 s−1 at 920 °C, and the critical dislocation density was 3.3 × 1014 m−2. The DRX behavior was carried out in a smaller strain rate range through a dynamic softening map, and the deformation temperature range was in a similar pattern with normal distribution. The volume fraction of DRX could be validly predicted by the JMAK model, the value of R was 0.995, and the value of the root mean-squared error (RMSE) was 2.96%.

Graphical abstract

Figure 1 shows the microstructure, hot deformation dynamic softening map, and predicted results of TC31 titanium alloy.