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<p>This research investigates hot deformation and stress relaxation behavior of TB8 alloy by hot tensile tests from 650 to 725 °C and 0.1 to 0.001&#xa0;s<sup>−1</sup>and hot stress relaxation test from 650 to 725 °C and 50 to 150&#xa0;MPa. The strain compensation Arrhenius constitutive and TCN models are established to describe the flow behavior with various deformation conditions. Stress relaxation and creep behavior are fitted by equations. The range of tensile strength and elongation are 78.12 to 309.46&#xa0;MPa and 38.56 to 186.61%, respectively. Increasing temperature and decreasing strain rate promote simultaneously DRX and thermal effect, resulting in increases in the grain size. For different initial stress, increasing temperature and decreasing initial stress increase the relaxation rate and has no significant influence on the relaxation limit. And the <i>R</i><sup>2</sup> values of the fitting result of relaxation equation and TCN are 0.981 and 0.9973, indicating the high fitting performance. And no obvious overfitting occurs.</p>

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Research on the Hot Deformation and Stress Relaxation Behavior of TB8 Alloy Based on the Deep Learning Method

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Xinyi Liang,
  • Minghe Chen,
  • Hongrui Dong,
  • Taowen Wu

摘要

This research investigates hot deformation and stress relaxation behavior of TB8 alloy by hot tensile tests from 650 to 725 °C and 0.1 to 0.001 s−1and hot stress relaxation test from 650 to 725 °C and 50 to 150 MPa. The strain compensation Arrhenius constitutive and TCN models are established to describe the flow behavior with various deformation conditions. Stress relaxation and creep behavior are fitted by equations. The range of tensile strength and elongation are 78.12 to 309.46 MPa and 38.56 to 186.61%, respectively. Increasing temperature and decreasing strain rate promote simultaneously DRX and thermal effect, resulting in increases in the grain size. For different initial stress, increasing temperature and decreasing initial stress increase the relaxation rate and has no significant influence on the relaxation limit. And the R2 values of the fitting result of relaxation equation and TCN are 0.981 and 0.9973, indicating the high fitting performance. And no obvious overfitting occurs.