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Abstract <p>In this study, a phenomenological crystal plasticity model (CPM) for hexagonal close-packed (hcp) titanium is parameterized using the simulated annealing (SA) algorithm. The phenomenological model is calibrated against the stress–strain data obtained from a tensile test on a polycrystalline commercially pure (CP) hcp Ti sample with 99.2% purity. The optimized model parameters are employed in CPM simulations where a representative volume consisting of 100 randomly oriented equiaxial grains is subjected to either tensile or compression deformation at a strain rate of 0.001/s. The model with the optimized parameters predicts mechanical behavior in agreement with experimental observations, including tensile-compression asymmetry (TCA).</p> Graphical abstract <p></p>

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Simulated annealing global optimization of crystal plasticity parameters and modeling of polycrystalline \(\upalpha\)-titanium

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • Marcio Gustavo Di Vernieri Cuppari,
  • Aníbal de Andrade Mendes Filho,
  • Roberto Gomes de Aguiar Veiga

摘要

Abstract

In this study, a phenomenological crystal plasticity model (CPM) for hexagonal close-packed (hcp) titanium is parameterized using the simulated annealing (SA) algorithm. The phenomenological model is calibrated against the stress–strain data obtained from a tensile test on a polycrystalline commercially pure (CP) hcp Ti sample with 99.2% purity. The optimized model parameters are employed in CPM simulations where a representative volume consisting of 100 randomly oriented equiaxial grains is subjected to either tensile or compression deformation at a strain rate of 0.001/s. The model with the optimized parameters predicts mechanical behavior in agreement with experimental observations, including tensile-compression asymmetry (TCA).

Graphical abstract