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Influence of Manufacturing Parameters on Microstructure and Hydrogen Sorption Behavior of Electron Beam Melted Titanium Ti-6Al-4V Alloy
National Research Tomsk Polytechnic University, Tomsk, Russia.
National Research Tomsk Polytechnic University, Tomsk, Russia.
National Research Tomsk Polytechnic University, Tomsk, Russia.ORCID iD: 0000-0001-7945-8273
National Research Tomsk Polytechnic University, Tomsk, Russia.
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2018 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 11, no 5, article id 763Article in journal (Refereed) Published
Abstract [en]

Influence of manufacturing parameters (beam current from 13 to 17 mA, speed function 98 and 85) on microstructure and hydrogen sorption behavior of electron beam melted (EBM) Ti-6Al-4V parts was investigated. Optical and scanning electron microscopies as well as X-ray diffraction were used to investigate the microstructure and phase composition of EBM Ti-6Al-4V parts. The average alpha lath width decreases with the increase of the speed function at the fixed beam current (17 mA). Finer microstructure was formed at the beam current 17 mA and speed function 98. The hydrogenation of EBM Ti-6Al-4V parts was performed at the temperatures 500 and 650 degrees C at the constant pressure of 1 atm up to 0.3 wt %. The correlation between the microstructure and hydrogen sorption kinetics by EBM Ti-6Al-4V parts was demonstrated. Lower average hydrogen sorption rate at 500 degrees C was in the sample with coarser microstructure manufactured at the beam current 17 mA and speed function 85. The difference of hydrogen sorption kinetics between the manufactured samples at 650 degrees C was insignificant. The shape of the kinetics curves of hydrogen sorption indicates the phase transition alpha(H)+beta(H)->beta(H).

Place, publisher, year, edition, pages
2018. Vol. 11, no 5, article id 763
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Mechanical Engineering
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URN: urn:nbn:se:miun:diva-34106DOI: 10.3390/ma11050763ISI: 000434711700113PubMedID: 29747471Scopus ID: 2-s2.0-85046844088OAI: oai:DiVA.org:miun-34106DiVA, id: diva2:1230628
Available from: 2018-07-04 Created: 2018-07-04 Last updated: 2018-07-04Bibliographically approved

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