High-pressure hydrogen charging of TiAl-based titanium aluminides

Journal Article · Tue Jan 13 04:00:00 EST 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00506-X· OSTI ID:611573

Takasaki, Akito ^[1]

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1. Shibaura Inst. of Tech., Omiya, Saitama (Japan). Dept. of Mechanical Engineering

The ordered intermetallic titanium aluminides, particularly Ti{sub 3}Al ({alpha}{sub 2}) and TiAl ({gamma}) based alloys, have attractive specific properties at elevated temperatures. These attractive properties imply that titanium aluminides will be exposed to hostile high-temperature environmental which can be hydrogen ranging all the way from cryogenic liquid hydrogen to elevated temperature high-pressure gaseous hydrogen. Most of the research on hydrogen effects in titanium aluminides have been focused on microstructural changes either by low-pressure gaseous hydrogen charging at elevated temperatures or cathodic hydrogen charging at room temperature. However, the process of hydrogen uptake in {gamma}-based alloys in a high-pressure of hydrogen gas has not yet been reported. This paper investigates the process of hydrogen uptake in {gamma}-based titanium aluminides by means of thermogravimetric measurements at a hydrogen pressure of 10 MPa.

• OSTI ID: 611573
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 4 Vol. 38; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
HYDROGEN EMBRITTLEMENT
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
TITANIUM ALLOYS