Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces

R. Jafari; B. Eghbali

doi:10.1007/s12613-021-2263-9

Volume 29 Issue 8

Aug. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(8): 1608-1617

R. Jafariand B. Eghbali, Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1608-1617. https://doi.org/10.1007/s12613-021-2263-9

Cite this article as:

R. Jafariand B. Eghbali, Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1608-1617. https://doi.org/10.1007/s12613-021-2263-9

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Research Article

Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces

R. Jafari¹ and
B. Eghbali^2,

+ Author Affiliations

Corresponding author:
B. Eghbali E-mail: eghbali@sut.ac.ir
Received: 5 August 2020; Revised: 20 January 2021; Accepted: 26 January 2021; Available online: 2 February 2021

Abstract

Abstract

The tri-metal Ti–Al–Nb composites were processed through three procedures: hot pressing, rolling, and hot pressing, followed by subsequent rolling. The fabricated composites were then subjected to annealing at 600, 625, and 650°C temperatures at different times. Microstructure observation at the interfaces reveals that the increase in plastic deformation strain significantly affects TiAl₃ intermetallic layers’ evolution and accelerates the layers’ growth. On the contrary, the amount of applied strain does not significantly affect the evolution of the NbAl₃ intermetallic layer thickness. It was also found that Al and Ti atoms’ diffusion has occurred throughout the TiAl₃ layer, but only Al atoms diffuse through the NbAl₃ layer. The slow growth rate of the NbAl₃ intermetallic layer is due to the lack of diffusion of Nb atoms and the high activation energy of Al atoms’ reaction with Nb atoms.
- intermetallic compounds;
- diffusion;
- Ti/Al/Nb composite;
- deformation;
- annealing

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