Diffusion coefficient of hydrogen in a cast gamma titanium aluminide

Journal Article · Fri Jun 04 00:00:00 EDT 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00056-1· OSTI ID:684352

Sundaram, P A; Wessel, E; Ennis, P J; Quadakkers, W J; Singheiser, L ^[1]

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1. Research Centre Juelich (Germany)

Gamma titanium aluminides have the potential for high temperature applications because of their high specific strength and specific modulus. Their oxidation resistance is good, especially at intermediate temperatures and with suitable alloying additions, good oxidation resistance can be obtained up to 800 C. One critical area of application is in combustion engines in aero-space vehicles such as hypersonic airplanes and high speed civil transport airplanes. This entails the use of hydrogen as a fuel component and hence the effect of hydrogen on the mechanical properties of gamma titanium aluminides is of significant scientific and technological utility. The purpose of this short investigation is to use an electrochemical method under galvanostatic conditions to determine the diffusion coefficient of hydrogen in a cast gamma titanium aluminide, a typical technical alloy with potential application in gas turbines under creep conditions. This result will be then compared with that obtained by microhardness profiling of electrolytically hydrogen precharged material.

• OSTI ID: 684352
• Journal Information: Scripta Materialia, Vol. 41, Issue 1; Other Information: PBD: 4 Jun 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOM TRANSPORT
TITANIUM ALLOYS
ALUMINIUM ALLOYS
HYDROGEN
DIFFUSION
ELECTROCHEMISTRY