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Thermodynamics of Selected Ti-Al and Ti-Al-Cr Alloys

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Abstract

Two alloys in the Ti-Al system (Ti-45 a/o Al,Ti-62Al) and three alloys in the Ti-Al-Cr system(Ti-47Al-2Cr, Ti-47Al-13Cr, Ti-51Al-12Cr) were selectedfor a thermodynamic study because of interest in their high-temperature oxidation behavior. Activitiesof Al and Ti were measured using a twin Knudsen-cellassembly with one cell acting as an internal standard.For the Ti-45Al alloy, Al activity was also measured with an EMF technique. The Ti-Al-Cr data wereconsistent with the Al and Ti activities expected fromthe adjacent binary Ti-Al phase fields. Implications ofthis work on oxidation properties arediscussed.

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Authors
  1. Nathan S. Jacobson
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  2. Michael P. Brady
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  3. Gopal M. Mehrotra
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Jacobson, N.S., Brady, M.P. & Mehrotra, G.M. Thermodynamics of Selected Ti-Al and Ti-Al-Cr Alloys. Oxidation of Metals 52, 537–556 (1999). https://doi.org/10.1023/A:1018820401533

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