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Sound velocity in severely deformed aluminum alloys: AA1100 and AA2024

Yaghoubi, F ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s00339-020-03481-x
  3. Publisher: Springer , 2020
  4. Abstract:
  5. The effects of severe plastic deformation on properties of AA1100 and AA2024 including the ultrasound velocity and the shear strength during multi-axial compression (MAC) are studied. Additionally, optical microscopy, scanning electron microscopy, and X-ray energy-dispersive spectroscopy are utilized. For both AA1100 and AA2024, an opposite trend is reported in the shear strength and the sound velocity versus deformation strain of MAC. At high strain range, AA1100 and AA2024 samples reach a plateau in the strength due to the occurrence of dynamic recovery. On the other hand, the sound velocity is shown to decrease 11% and 15% for AA1100 and AA2024, respectively. Furthermore, the microstructural evaluation reveals that during severe plastic deformation, grain refining for both aluminum alloys occurs. Remarkably, elongated precipitates for severely deformed AA2024 samples are observed. Both an increase in grains boundaries followed by grain refining and elongated precipitates contribute to ultrasonic wave scattering. The presence of such scattering sites is responsible for a noticeable decrease in sound velocity. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature
  6. Keywords:
  7. Aluminum alloy ; Microstructure ; Multi-axial compression ; Severe plastic deformation ; Ultrasound velocity ; Acoustic wave scattering ; Axial compression ; Energy dispersive spectroscopy ; Plastic deformation ; Refining ; Scanning electron microscopy ; Shear flow ; Ultrasonic velocity ; Deformation strain ; Deformed aluminum alloys ; Dynamic recovery ; Microstructural evaluation ; Severe plastic deformations ; Ultra-sound velocities ; Ultrasonic wave scattering ; X-ray energy dispersive spectroscopy ; Aluminum alloys
  8. Source: Applied Physics A: Materials Science and Processing ; Volume 126, Issue 4 , 2020
  9. URL: https://link.springer.com/article/10.1007/s00339-020-03481-x