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Influence of hydrogen environment on the mechanical properties of cast and electron beam melted Ti-6Al-4V
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3661-9262
2012 (English)In: Ti-2011: proceedings of the 12th World Conference on Titanium, June 19-24, 2011, China National Convention Center (CNCC), Beijing / [ed] Lian Zhou, Beijing: Social Sciences Academic Press (China), 2012, Vol. 3, 1885-1888 p.Conference paper, Published paper (Refereed)
Abstract [en]

In order to save weight in a certain engine application the possibility of replacing the currently used material with cast Ti-6Al-4V is investigated here. The working environment for this particular engine part is pure hydrogen gas at high pressure. Therefore selected mechanical properties such as tensile and low cycle fatigue (LCF) in air and hydrogen atmosphere have been studied for cast Ti-6Al-4V. In addition to cast Ti-6Al-4Vt the corresponding mechanical properties of a more recently developed additive manufacturing method, electron beam melting (EBM), is also investigated in hydrogen and compared with cast Ti-6Al-4V. Cast Ti-6Al-4V showed lower yield strength and lower ultimate tensile strength in hydrogen compared with air. However, no significant change in the ductility was observed. The LCF was significantly reduced in the hydrogen atmosphere, mostly at high strain range (π 2%). The EBM Ti-6Al-4V in hydrogen showed higher yield strength, higher ultimate strength and higher ductility as well as improved fatigue life compared with cast Ti-6Al-4V under the same test conditions. Microstructural and fractographic characterization were also performed and the results are included.

Place, publisher, year, edition, pages
Beijing: Social Sciences Academic Press (China), 2012. Vol. 3, 1885-1888 p.
Keyword [en]
Hydrogen, Titanium, Fatigue, Fractography, Materials science - Construction materials
Keyword [sv]
Teknisk materialvetenskap - Konstruktionsmaterial
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-39766Local ID: ea3b846c-a219-42ec-ad74-df606d7ced36ISBN: 978-7-03-033894-5 (print)OAI: oai:DiVA.org:ltu-39766DiVA: diva2:1013284
Conference
World Conference on Titanium : 19/06/2011 - 24/06/2011
Note
Godkänd; 2012; 20111213 (piaake)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-09-13Bibliographically approved

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