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<p>Titanium alloy sheets are widely used in aerospace applications due to their high strength-to-weight ratio and corrosion resistance. During sheet metal forming, springback caused by anelastic strain recovery behaviour leads to dimensional inaccuracies. This behaviour is influenced by limited slip systems and the activation of reversible twinning in titanium alloys. In this study, commercially pure titanium and Ti6Al4V alloy sheets of 1.2&#xa0;mm thickness were subjected to a loading–unloading tensile loop test over strain levels from 0.05% to 30%. Anelastic strains were quantified by separating elastic, plastic and anelastic components from the loops. The evolution of anelastic strain with plastic strain was analysed, and twin area fraction was quantified. The results indicate a strong correlation between twinning activity and the observed anelastic response.</p>

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Quantification of Anelastic Behaviour and Area Fraction of Twins in CP-Ti and Ti6Al4V Alloy Sheets

  • 期刊论文

  • 发表日期：

    2026年5月31日

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  • Anupriya N,
  • Nagarajan D,
  • Ravisankar B

摘要

Titanium alloy sheets are widely used in aerospace applications due to their high strength-to-weight ratio and corrosion resistance. During sheet metal forming, springback caused by anelastic strain recovery behaviour leads to dimensional inaccuracies. This behaviour is influenced by limited slip systems and the activation of reversible twinning in titanium alloys. In this study, commercially pure titanium and Ti6Al4V alloy sheets of 1.2 mm thickness were subjected to a loading–unloading tensile loop test over strain levels from 0.05% to 30%. Anelastic strains were quantified by separating elastic, plastic and anelastic components from the loops. The evolution of anelastic strain with plastic strain was analysed, and twin area fraction was quantified. The results indicate a strong correlation between twinning activity and the observed anelastic response.