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Hydrogen-induced ph...
Hydrogen-induced phase transformation and microstructure evolution for Ti-6Al-4V parts produced by electron beam melting
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- Pushilina, Natalia (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Panin, Alexey (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia; Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia
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- Syrtanov, Maxim (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Kashkarov, Egor (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Kudiiarov, Viktor (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Perevalova, Olga (författare)
- Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia
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- Laptev, Roman (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Lider, Andrey (författare)
- School of Nuclear Physics, National Research Tomsk Polytechnic University, Russia
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- Koptioug, Andrei, 1956- (författare)
- Mittuniversitetet,Avdelningen för kvalitets- och maskinteknik
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(creator_code:org_t)
- 2018-04-26
- 2018
- Engelska.
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Ingår i: Metals. - : MDPI AG. - 2075-4701. ; 8:5
- Relaterad länk:
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https://doi.org/10.3...
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https://miun.diva-po... (primary) (Raw object)
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https://www.mdpi.com...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- In this paper, phase transitions and microstructure evolution in titanium Ti-6Al-4V alloy parts produced by electron beam melting (EBM) under hydrogenation was investigated. Hydrogenation was carried out at the temperature of 650 °C to the absolute hydrogen concentrations in the samples of 0.29, 0.58, and 0.90 wt. %. Comparative analysis of microstructure changes in Ti-6Al-4V alloy parts was performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Furthermore, in-situ XRD was used to investigate the phase transitions in the samples during hydrogenation. The structure of Ti-6Al-4V parts produced by EBM is represented by the α phase plates with the transverse length of 0.2 µm, the β phase both in the form of plates and globular grains, and metastable α'' and ω phases. Hydrogenation to the concentration of 0.29 wt. % leads to the formation of intermetallic Ti3Al phase. The dimensions of intermetallic Ti3Al plates and their volume fraction increase significantly with hydrogen concentration up to 0.58 wt. % along with precipitation of nano-sized crystals of titanium δ hydrides. Individual Ti3Al plates decay into nanocrystals with increasing hydrogen concentration up to 0.9 wt. % accompanied by the increase of proportion and size of hydride plates. Hardness of EBM Ti-6Al-4V alloy decreases with hydrogen content.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Annan maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Other Mechanical Engineering (hsv//eng)
Nyckelord
- Additive manufacturing
- Electron beam melting
- Hydrogen
- Microstructure
- Phase transitions
- Titanium Ti-6Al-4V alloy
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- art (ämneskategori)
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