Dehydrogenation of Hydrogenated Ti-6Al-4V Alloy

摘要:

对未置氢及置氢Ti-6Al-4V合金进行了TG/DSC试验，研究了置氢钛合金的除氢行为。结果表明，当温度超过600 ℃时，置氢钛合金的失重规律与未置氢钛合金具有较大的差别。当加热温度在600~900 ℃之间时，置氢钛合金的失重随着氢含量的增加而增加。这是由于置氢合金中的亚稳相发生了分解。不考虑合金氧化的影响，置氢钛合金的最大失重与合金中的氢含量一致。置氢钛合金的最佳除氢温度为750 ℃。对于不同氢含量的置氢钛合金，其除氢工艺是相同的

Abstract:

TG/DSC tests of non-hydrogenated and hydrogenated Ti-6Al-4V alloys were carried out in order to investigate the dehydrogenation behavior of hydrogenated titanium alloys. Results indicate that mass losses of the hydrogenated Ti-6Al-4V alloys are significantly different with that of the non-hydrogenated Ti-6Al-4V alloy when the heating temperature is higher than 600 oC. Mass loss of the hydrogenated Ti-6Al-4V alloy increases with the increasing of hydrogen content when the heating temperature is in the range of 600 oC to 900 oC due to the decomposition of metastable phases. The maximum mass loss of the hydrogenated Ti-6Al-4V alloy is in correspondence with its hydrogen content upon no consideration of oxidation. The optimal dehydrogenation temperature among hydrogenated Ti-6Al-4V alloys is 750 oC. The dehydrogenation process for all hydrogenated Ti-6Al-4V alloys is the same