Novel aluminum alloys have been increasingly used in the aviation and automobile industries, necessitating more in-depth research on their mechanical properties. To advance understanding in this field, this study systematically investigated the evolution of shear deformation of these two aluminum alloys (Al 7050 and Al 2024) under forced shear loading at different strain rates by using Digital Image Correlation (DIC), Hopkinson bar technique, and infrared thermography. Hat-shaped specimens were used to conduct the experiments. This research successfully established rate-dependent shear stress-strain curves, temperature-strain curves, and force-displacement curves under various strain rate conditions. Until the final collapse of the specimen, the overall temperature rise remains quite modest. The findings provide valuable insights into the dynamic shear response of lightweight aluminum alloys and establish a foundation for optimizing their engineering applications.

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Strain Rate Dependent Shear Behavior and Thermal Response of Al 2024 and Al 7050 Alloys: Insights from Dynamic Testing

  • Zhengkang He,
  • Liying Chen,
  • Longhui Zhang

摘要

Novel aluminum alloys have been increasingly used in the aviation and automobile industries, necessitating more in-depth research on their mechanical properties. To advance understanding in this field, this study systematically investigated the evolution of shear deformation of these two aluminum alloys (Al 7050 and Al 2024) under forced shear loading at different strain rates by using Digital Image Correlation (DIC), Hopkinson bar technique, and infrared thermography. Hat-shaped specimens were used to conduct the experiments. This research successfully established rate-dependent shear stress-strain curves, temperature-strain curves, and force-displacement curves under various strain rate conditions. Until the final collapse of the specimen, the overall temperature rise remains quite modest. The findings provide valuable insights into the dynamic shear response of lightweight aluminum alloys and establish a foundation for optimizing their engineering applications.