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Fatigue behavior must be carefully considered while designing engineering components, particularly when subjected to multiaxial loadings in High-Cycle Fatigue (HCF). This work aims to find the fatigue limit for A357-T6, a cast aluminum alloy with a spherical pore under tension-torsion stress. The Crossland equivalent stress is calculated using finite element (FE) simulations, at the critical plane of about \({60}^{^\circ }\) of the tensile loading direction. The distance between the sample's interior and the spherical pore's tip is the Affected Depth (AD), computed for a surface spherical pore. The Kitagawa-Takahashi diagram is simulated for different spherical microstructures with a load ratio of \({R}_{\upsigma }\) =0.1, using the AD method. The experimental results and these simulations show a significant correlation.

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Kitagawa Diagram of Defective A357-T6 Cast Aluminum Alloy Under Torsion-Tension Loading Based on Affected Depth

  • 会议论文

  • 发表日期：

    2025年

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  • Nesrine Majed,
  • Anouar Nasr,
  • Marwa Youssef

摘要

Fatigue behavior must be carefully considered while designing engineering components, particularly when subjected to multiaxial loadings in High-Cycle Fatigue (HCF). This work aims to find the fatigue limit for A357-T6, a cast aluminum alloy with a spherical pore under tension-torsion stress. The Crossland equivalent stress is calculated using finite element (FE) simulations, at the critical plane of about \({60}^{^\circ }\) of the tensile loading direction. The distance between the sample's interior and the spherical pore's tip is the Affected Depth (AD), computed for a surface spherical pore. The Kitagawa-Takahashi diagram is simulated for different spherical microstructures with a load ratio of \({R}_{\upsigma }\) =0.1, using the AD method. The experimental results and these simulations show a significant correlation.