The kinetics of hydrogen diffusion in Ti3Al-based alloy |
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Authors: | Yexin Chen Xiaojing Wan |
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Institution: | (1) School of Materials Sci.& Eng., Shanghai University, 149 Yanchang Road, 20072 Shanghai |
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Abstract: | The process of gaseous hydrogen charging into a Ti3Al-based alloy in the temperature range of 500–650°C is investigated. The results showe that the relationship between the
average hydrogen concentration at constant temperature and charging time reveals a parabolic rate law. Applying the theory
of lattice diffusion to analyze the hydrogen diffusion in the alloy, we find that the apparent activation energy of hydrogen
diffusion is 90.40 kJ/mol, and the equilibrium hydrogen content in the alloy depends on the temperature of the gaseous hydrogen
charging process.
Project supported by the Natural Science Foundation of Shanghai (93QE14002) |
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Keywords: | Ti3Al-based alloy hydrogen diffusion |
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