Ultrasonic assisted cold compaction of CP titanium and Ti-6Al-4V alloy

Document Type : Research Article

Authors

1 Department of Industrial Design, Faculty of Art, Alzahra University, Tehran. Iran

2 Department of Mechanical Engineering, University of Science and Technology, Tehran, Iran

3 Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran

4 Materials and Metallurgical Engineering Department, Amirkabir University of Technology, Tehran, Iran

Abstract

Superimposed ultrasonic vibration during compaction of commercially pure (CP) titanium and Ti-6Al-4V alloy improves the relative density and quality of the compact. The underlying mechanisms of this process are not well understood. In this study, the influence of ultrasonic vibrations on the densification behavior of square packing of Ti-6Al-4V and CP-Ti powders during cold compaction was investigated using the Multi-Particle Finite Element Method (MPFEM). Acoustic softening and friction reduction were introduced in this model. The density-pressure curves show that ultrasonic vibration improves the densification of these powders, owing to the acoustic softening that leads to a decline in the required pressure. It has been found that the ultrasonic effect on reducing the compaction pressure and stress in the case of pure titanium is greater than that of titanium alloy. In addition, an increase in the intensity and amplitude of ultrasonic vibration reduces stress. The rotation and rearrangement of the particles caused by the reduction of friction lead to an enhancement in the compression capability.

Graphical Abstract

Ultrasonic assisted cold compaction of CP titanium and Ti-6Al-4V alloy

Highlights

  • The multi-particle finite element method was used to simulate ultrasonic-assisted cold compaction of CP-Ti and Ti-6Al-4V.
    Acoustic softening was studied for each material.
  • Friction reduction due to ultrasonic vibration was investigated.
  • Reduction of compaction pressure was recorded while applying ultrasonic vibration.
  • Higher particle rearrangement and plastic deformation were found due to vibration.

Keywords

Main Subjects

Copyright © 2024 The Author(s). Published by IROST.

References

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Journal of Particle Science and Technology
Volume 10, Issue 2
December 2024
Pages 87-96

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History

  • Receive Date: 08 September 2024
  • Revise Date: 10 November 2024
  • Accept Date: 18 November 2024

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