Hydrogen Absorption and Desorption of Ti-6A1-4V Alloy, Low Activation Material for Fusion Reactor

采用热解吸光谱法研究了低活化材料Ti-6A1-4V合金的吸氢性能。将抛光后的样品暴露在氢气气氛中，压力为0.03至100 Pa，温度为500-820 K，时间为1至48小时。抛光样品的吸收量非常低，远低于氢脆发生的临界浓度（1000ppm）。但经预热后的样品吸收量较大。当压力保持0.3Pa时，温度为650 K，浓度最高，约为250ppm。因此值仍然低于临界浓度。本实验进一步加深了对吸氢行为的解释。结果表明，Ti-6A1-4V合金可以作为核聚变反应堆的结构材料。

The hydrogen absorption properties of low activation material, Ti-6A1-4V alloy, were studied by using thermal desorption spectroscopy. The polished sample was exposed to the hydrogen atmosphere with pressure from 0.03 to 100 Pa, temperature from 500-820 K and time duration from 1 to 48 hrs. The absorption amount of the polished sample was very low, much below the critical concentration (1000ppm) for the hydrogen embrittlement to take place. However, the absorption amount of pre-heated sample was observed to be large. The highest concentration was about 250ppm under the temperature of 650 K when the pressure was kept 0.3Pa. Thus value is still lower than the critical conentration.The interpretation for hydrogen absorption behavior was much deepened by the present experiment. It is also seen that Ti-6A1-4V alloy can be used for the structure material of a fusion reactor.