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In comparison to other metal additive manufacturing technologies, electron beam melting offers several advantages, including higher energy efficiency, increased scanning speed, and reduced thermal distortion. The Ti6Al4V alloy is notable for its exceptional combination of strength, ductility, good high-temperature corrosion resistance, and a high strength–density ratio. Industries, particularly aerospace, where components endure low or elevated strain rates at service temperature, necessitate isothermal hot compression experiments on the homogenized alloy to understand its behavior. This research focuses on investigating the hot deformation behavior within the temperature range of 250–350 °C and the strain rate of 10 s−1. To predict the flow behavior of this microstructurally complex alloy, we employed the modified Johnson–Cook constitutive model and corresponding numerical simulation based on stress-strain and work-hardening characteristics. For the simulation of the hot deformation experiment, Lagrangian smoothed particle hydrodynamics in combination with the ABAQUS/Explicit subroutine was employed.

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Numerical Modeling Behavior of Split Hopkinson Pressure Bar of Additively Manufactured Ti6Al4V

  • 会议论文

  • 发表日期：

    2025年

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  • Mohsen Keshavarzana,
  • Reza Alaghmandfard,
  • Foroozan Forooghi,
  • Mohsen Mohammadi

摘要

In comparison to other metal additive manufacturing technologies, electron beam melting offers several advantages, including higher energy efficiency, increased scanning speed, and reduced thermal distortion. The Ti6Al4V alloy is notable for its exceptional combination of strength, ductility, good high-temperature corrosion resistance, and a high strength–density ratio. Industries, particularly aerospace, where components endure low or elevated strain rates at service temperature, necessitate isothermal hot compression experiments on the homogenized alloy to understand its behavior. This research focuses on investigating the hot deformation behavior within the temperature range of 250–350 °C and the strain rate of 10 s−1. To predict the flow behavior of this microstructurally complex alloy, we employed the modified Johnson–Cook constitutive model and corresponding numerical simulation based on stress-strain and work-hardening characteristics. For the simulation of the hot deformation experiment, Lagrangian smoothed particle hydrodynamics in combination with the ABAQUS/Explicit subroutine was employed.