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<p>Aluminium alloys are widely used in aerospace and cryogenic industries, where the components must withstand a complex multiaxial loading. In this study, the deformation behaviour of AA2219 in ‘O’ condition is investigated by testing biaxial tensile at room temperature, elevated temperature (150&#xa0;°C), and sub-zero temperature (− 40&#xa0;°C). The biaxial tensile experiments are used to construct a temperature-dependent yield locus of AA2219, allowing us to understand the initial yielding and anisotropic plastic response. Furthermore, to correlate the mechanical response and microstructure evolution, microstructural characterisation has been carried out using electron backscattered diffraction (EBSD). The results highlight the temperature-dependent deformation mechanism, under multiaxial loading, governed primarily by changes in dislocation activity, grain morphology, and recovery mechanisms. These findings provide valuable insights for AA2219 components performance.</p>

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Yield Locus Evolution of AA2219-O Aluminium Alloy: Under Temperature-Dependent Biaxial Loading

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Parvej Raut,
  • Priya Tiwari,
  • Jeet Patil,
  • Rajesh Raghavan,
  • Sushil Mishra

摘要

Aluminium alloys are widely used in aerospace and cryogenic industries, where the components must withstand a complex multiaxial loading. In this study, the deformation behaviour of AA2219 in ‘O’ condition is investigated by testing biaxial tensile at room temperature, elevated temperature (150 °C), and sub-zero temperature (− 40 °C). The biaxial tensile experiments are used to construct a temperature-dependent yield locus of AA2219, allowing us to understand the initial yielding and anisotropic plastic response. Furthermore, to correlate the mechanical response and microstructure evolution, microstructural characterisation has been carried out using electron backscattered diffraction (EBSD). The results highlight the temperature-dependent deformation mechanism, under multiaxial loading, governed primarily by changes in dislocation activity, grain morphology, and recovery mechanisms. These findings provide valuable insights for AA2219 components performance.