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<p>The traditional approach to calculating anisotropy via interrupted tensile deformation does not fully capture the accurate Lankford parameters, thereby questioning the accuracy of the yield criterion. Various anisotropic yield criteria consider only the initial yield values and use them to calculate the associated anisotropic parameters. In this work, the uniaxial tensile tests were conducted at 0°, 45°, and 90° with respect to the rolling direction. The 2D DIC method is employed to capture the strain fields in the gauge region. The uniform elongation region is predicted using the Swift hardening model. The evolving Lankford parameters were predicted with a 4th-order polynomial function and subsequently implemented in Hill’48 anisotropic yield criterion. The strain-dependent Hill’s 48 criterion is incorporated due to its fewer anisotropic parameters and reduced testing requirements for fully capturing the evolving yield locus. The results indicate that the modified criteria precisely capture the anisotropic behaviour of the AZ31B alloy.</p>

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Anisotropic Behaviour of AZ31B Magnesium Alloy Using Strain-Dependent Hill’48 Yield Approach

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Aarjoo Jaimin,
  • Nitin Kotkunde,
  • Swadesh Kumar Singh

摘要

The traditional approach to calculating anisotropy via interrupted tensile deformation does not fully capture the accurate Lankford parameters, thereby questioning the accuracy of the yield criterion. Various anisotropic yield criteria consider only the initial yield values and use them to calculate the associated anisotropic parameters. In this work, the uniaxial tensile tests were conducted at 0°, 45°, and 90° with respect to the rolling direction. The 2D DIC method is employed to capture the strain fields in the gauge region. The uniform elongation region is predicted using the Swift hardening model. The evolving Lankford parameters were predicted with a 4th-order polynomial function and subsequently implemented in Hill’48 anisotropic yield criterion. The strain-dependent Hill’s 48 criterion is incorporated due to its fewer anisotropic parameters and reduced testing requirements for fully capturing the evolving yield locus. The results indicate that the modified criteria precisely capture the anisotropic behaviour of the AZ31B alloy.