Numerical simulation of intermediate phase growth in Ti/Al alternate foils

To investigate the diffusion reaction between Ti/Al solid diffusion couple, Ti/Al alternate foils formed by hot pressing were annealed at 525, 550, 575 and 600 °C for time ranging from 1 to 40 h. The experimental results show that TiAl 3 was the only observed phase at Ti/Al interface. The interface...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2011-03, Vol.21 (3), p.598-603
Main Authors: LIU, Jiang-ping, LUO, Liang-shun, SU, Yan-qing, XU, Yan-jing, LI, Xin-zhong, CHEN, Rui-run, GUO, Jing-jie, FU, Heng-zhi
Format: Article
Language:English
Subjects:
Aluminum
Computer simulation
Diffusion
diffusion couple
finite difference method
Foils
hot pressing
Intermetallic compounds
Intermetallics
Mathematical models
numerical simulation
TiAl 3
Titanium
Titanium aluminides
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Summary:To investigate the diffusion reaction between Ti/Al solid diffusion couple, Ti/Al alternate foils formed by hot pressing were annealed at 525, 550, 575 and 600 °C for time ranging from 1 to 40 h. The experimental results show that TiAl 3 was the only observed phase at Ti/Al interface. The interface thermodynamics favored the preferential formation of TiAl 3 in Ti/Al couple. The growth of TiAl 3 layer occurred mainly towards Al foil side and exhibited a parabolic law. Using the interdiffusion coefficients calculated based on the contribution of grain boundary diffusion, the growth of TiAl 3 was simulated numerically with the finite difference method, and the simulated results were in good agreement with the experimental ones.
ISSN:1003-6326
DOI:10.1016/S1003-6326(11)60756-5