The Kinetics of Hydrogen Diffusion in Ti_3Al-Based Alloy

摘要

The process of gaseous hydrogen charging into a Ti_3Al-based alloy in the temperature range of 500-650℃ 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 9040 kJ/mol. and the equilibrium hydrogen content in the alloy depends on the temperature of the gaseous hydrogen charging process.