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<p>A crucial alloying element in the high-strength aluminum alloy 7075, which is frequently utilized in airplane wings and fuselages, is zinc. It is essential to comprehend the behavior of fatigue cracks, including compliance and crack tip opening displacement (CTOD), to evaluate how well these aluminum structures operate under fatigue stress. The fatigue crack development response of aluminum alloy 7075 is investigated in this work about annealing and cryogenic treatments to improve ductility and fracture toughness while decreasing residual stresses linked to processing. Following ASTM Standard E647 protocols, test specimens were subjected to continuous amplitude fatigue loading. To ascertain how inherent properties that impact fracture development kinetics are impacted by annealing and cryogenic treatment, the microstructure was examined. The results are shown, emphasizing how intricately microstructural features interact and affect fatigue behavior.</p>

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Influence of Heat and Cryogenic Treatments on Fatigue Crack Growth Behavior in a High-Strength Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • P. C. Arunakumara,
  • C. Siddaraju,
  • T. S. Srivatsan,
  • Mallikarjun Biradar,
  • M. Chandragowda,
  • V. N. Vivek Bhandarkar,
  • Gopal Kaliyaperumal,
  • C. Durga Prasad

摘要

A crucial alloying element in the high-strength aluminum alloy 7075, which is frequently utilized in airplane wings and fuselages, is zinc. It is essential to comprehend the behavior of fatigue cracks, including compliance and crack tip opening displacement (CTOD), to evaluate how well these aluminum structures operate under fatigue stress. The fatigue crack development response of aluminum alloy 7075 is investigated in this work about annealing and cryogenic treatments to improve ductility and fracture toughness while decreasing residual stresses linked to processing. Following ASTM Standard E647 protocols, test specimens were subjected to continuous amplitude fatigue loading. To ascertain how inherent properties that impact fracture development kinetics are impacted by annealing and cryogenic treatment, the microstructure was examined. The results are shown, emphasizing how intricately microstructural features interact and affect fatigue behavior.