Effect of hydrogen on diffusion bonding of commercially pure titanium and hydrogenated Ti6Al4V alloys

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 β H phase increased with the hydrogen content increasing in hydrogenated alloys, and the δ titanium hydride and α′ martens...

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Bibliographic Details
Published in:International journal of hydrogen energy 2009, Vol.34 (2), p.1108-1113
Main Authors: Liu, H., Cao, J., He, P., Feng, J.C.
Format: Article
Language:English
Subjects:
Alloys
Alternative fuels. Production and utilization
Applied sciences
Differential scanning calorimetry
Diffusion bonding
Energy
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Hydrogenated Ti6Al4V alloy
Nonisothermal dehydrogenation
Phase structure
Titanium
Titanium base alloys
Transmission electron microscopy
Voids
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Summary: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 β H phase 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 β H phase and release speed of hydrogen as well as the occurrence of more dehydrogenation reaction.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2008.10.071