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Metallurgical and Materials Transactions A

, Volume 50, Issue 1, pp 415–425 | Cite as

Fabrication of Al-TiAl3 Composite Via In-Situ Accumulative Roll Bonding (ARB) and Annealing

  • Maryam Safiri
  • Mahmood Meratian
  • Masoud Panjepour
Article
  • 105 Downloads

Abstract

In this study, titanium particles (with an average size of 48 µm) are dispersed throughout Al foils using the accumulative roll bonding method. The reaction between the particles and the matrix is subsequently activated thermally by post-rolling annealing. The in-situ reaction between the titanium powder and the aluminum matrix promoted by mechanical activation due to accumulative roll bonding and thermal activation due to annealing leads to the formation of Ti-Al intermetallic compounds. The distribution of particles and the intermetallic compounds thus formed are characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), field-emission SEM (FESEM), electron probe micro-analysis (EPMA), and optical microscopy. The composite produced with 5 wt pct particles after 20 cycles of rolling and annealing yields the best particle distribution and TiAl3 formation such that the only intermetallic compound formed is TiAl3. The highest TiAl3 contents are recorded in the Al-TiAl3 composite formed by 20 cycles of rolling and annealed after rolling cycle numbers 5 and 9 (2 hours at 430 °C), as well as 12, 17, and 20 (2 hours at 600 °C). Surface energy is found to decrease when the most faceted particles become spherical in shape at high temperatures during the annealing process. Particles as small as 250 nm in size are also observed to form in this composite, and thus fabricated.

Notes

Acknowledgments

The Particulate Materials Research Group at the Department of Materials Engineering, Isfahan University of Technology, deserve the authors’ gratitude for their full support throughout this study. Our deep appreciation also goes to Dr. Ezzatollah Roustazadeh from ELC, IUT, for editing the final manuscript in English.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Maryam Safiri
    • 1
  • Mahmood Meratian
    • 1
  • Masoud Panjepour
    • 1
  1. 1.Department of Materials EngineeringIsfahan University of TechnologyIsfahanIran

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