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用气相充氢法研究了Ti-6Al-4V合金在初始氢气压力为0.012、0.04和0.07 MPa,温度为800、850和900℃条件下充氢过程中的氢扩散动力学。结果表明,在不同的初始氢气压力和充氢温度下,合金中的平均氢浓度随充氢时间的变化呈现指数关系,由此可见Ti-6Al-4V合金的充氢过程受氢原子的扩散所控制。通过求解扩散方程得到,氢在Ti-6Al-4V合金中的表观扩散激活能为32.80 kJ/mol,此激活能为氢在Ti-6Al-4V合金相中的扩散激活能。
Hydrogen diffusion kinetics of Ti-6Al-4V alloy during hydrogen charging at initial hydrogen pressure of 0.012, 0.04 and 0.07 MPa and temperatures of 800, 850 and 900 ℃ were studied by vapor phase hydrogenation. The results show that under different initial hydrogen pressures and hydrogen charging temperatures, the average hydrogen concentration in the alloy shows an exponential relationship with the hydrogen charging time. It can be seen that the hydrogen charging of Ti-6Al-4V alloy is affected by the diffusion of hydrogen atoms control. By solving the diffusion equation, the apparent diffusion activation energy of hydrogen in Ti-6Al-4V alloy is 32.80 kJ / mol. The activation energy is the diffusion activation energy of hydrogen in the Ti-6Al-4V alloy phase.