Positron Spectroscopy of Hydrogen-Loaded Ti-6Al-4V Alloy with Different Defect Structure |
| R. Laptev, N. Pushilina, E. Stepanova, M. Syrtanov
Division for Experimental Physics, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050, Tomsk, Russia |
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| The defect structure of annealed cast, electron beam melted and ultrafine-grained titanium Ti-6Al-4V alloys before and after hydrogenation was studied. It has been established that before hydrogenation the predominant types of defects in electron beam melted and ultrafine-grained titanium alloy are dislocations and low-angle boundaries, respectively. The cast alloy after annealing is defect-free material. Hydrogenation from the gas phase to 1.00±0.15 wt% leads to an increase of the concentration of the predominant type of defects. Moreover, vacancy complexes also presented in electron beam melted and ultrafine-grained Ti-6Al-4V alloys interact with hydrogen and form hydrogen-vacancy complexes. |
DOI:10.12693/APhysPolA.137.242 PACS numbers: 61.72.Ff, 61.82.Bg, 78.70.Bj |