Effect of hydrogen on diffusion bonding of commercially pure titanium and hydrogenated Ti6Al4V alloys
Effect of hydrogen on diffusion bonding of commercially pure titanium and hydrogenated Ti6Al4V alloys
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DOI：
10.1016/j.ijhydene.2008.10.071
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发表时间：
2009
影响因子：
7.2
通讯作者：
Hui Liu;Jian Cao;P. He;J. Feng
中科院分区：
文献类型：
--
作者：
Hui Liu;Jian Cao;P. He;J. Feng
对工业纯钛和氢化后的Ti6 Al 4V合金进行了扩散连接，并通过SEM、XRD、TEM和TG/DSC等分析手段研究了氢对扩散连接的影响。氢化后合金中β H相随氢含量的增加而增多，在高氢含量时出现δ氢化钛和α′马氏体。在600°C ~ 950°C范围内，合金的热重曲线下降，DSC曲线出现一个较大的吸热峰。此外，在扩散连接界面处观察到一些空隙。随着氢含量的增加，孔隙数量逐渐减少，扩散连接质量逐渐提高，这是由于软β H相增多，氢释放速度加快，脱氢反应增多所致。
The diffusion bonding of commercially pure titanium and hydrogenated Ti6Al4V alloys was carried out, and the effect of hydrogen was investigated by SEM, XRD, TEM and TG/DSC. The βHphase increased with the hydrogen content increasing in hydrogenated alloys, and the δ titanium hydride and α′ martensite were found in high hydrogen content. The TG curves of hydrogenated alloys descended between 600°C and 950°C, and the DSC curves represented a large endothermic peak correspondingly. Moreover, some voids were observed at the diffusion bonding interface. The amount of voids decreased and diffusion bonding quality improved gradually with the increase of hydrogen content, which was attributed to the increase of soft βHphase and release speed of hydrogen as well as the occurrence of more dehydrogenation reaction.