Titanium defect structure change after gas-phase hydrogenation at different temperatures and cooling rates

Influence of gas-phase hydrogenation temperature and cooling rate on defect structure of commercially pure titanium alloy was experimentally studied by means of positron annihilation spectroscopy. The change of temperature in the process of gas-phase hydrogenation was in the range of 500–700°C, whil...

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Bibliographic Details
Main Authors: Mikhaylov, Andrey A., Laptev, Roman S., Kudiiarov, Viktor N., Volokitina, Tatiana L.
Format: Conference Proceeding
Language:English
Subjects:
Cooling
Cooling rate
Defects
High temperature gases
Hydrogen storage
Hydrogenation
Phase transitions
Positron annihilation
Titanium alloys
Titanium base alloys
Vacancies
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Summary:Influence of gas-phase hydrogenation temperature and cooling rate on defect structure of commercially pure titanium alloy was experimentally studied by means of positron annihilation spectroscopy. The change of temperature in the process of gas-phase hydrogenation was in the range of 500–700°C, while the change of cooling rate was in the range of 0.4–10.4°C/min. With increasing of gas-phase hydrogenation temperature, significant increase of hydrogen sorption rate was found. High temperature gas-phase hydrogenation of commercially pure titanium alloy lead to the formation of vacancy and hydrogen-vacancy complexes. For the same concentration of hydrogen, temperature variation or variation of cooling rate had no effect on the type of defect. However, this variation provides significant changes in defect concentration.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4966445