Effect of Cr, Nb, Mn, V, W and Si on high temperature oxidation of TiAl alloys

Alloys of Ti−(47,51)Al, Ti47Al−4Cr, Ti48Al−2Cr2Nb, Ti47Al−1Mn, Ti39.4Al−10V, Ti48.4Al−1.9W, and Ti43Al−2W0.1Si were oxidized at temperatures between 800 and 1000 °C in air to determine the effect of each alloying element on oxidation behavior. Among the alloys tested, the Ti48.4Al-1.9W alloy display...

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Bibliographic Details
Published inMetals and materials international Vol. 11; no. 2; pp. 141 - 147
Main Author Lee, Dong-Bok
Format Journal Article
LanguageEnglish
Published Seoul Springer Nature B.V 01.04.2005
Subjects
Alloying elements
Alloys
Aluminum base alloys
Chromium
High temperature
Intermetallic compounds
Intermetallics
Manganese
Niobium
Oxidation
Oxidation rate
Oxidation resistance
Silicon
Titanium aluminides
Titanium base alloys
Tungsten
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Summary:Alloys of Ti−(47,51)Al, Ti47Al−4Cr, Ti48Al−2Cr2Nb, Ti47Al−1Mn, Ti39.4Al−10V, Ti48.4Al−1.9W, and Ti43Al−2W0.1Si were oxidized at temperatures between 800 and 1000 °C in air to determine the effect of each alloying element on oxidation behavior. Among the alloys tested, the Ti48.4Al-1.9W alloy displayed the best oxidation resistance, due to the beneficial effects of W, whereas the Ti39.4Al-10V alloy displayed the worst oxidation resistance, due to the formation of volatile V-oxides. Cr was harmful while Nb was beneficial. The oxidation rate of each alloy was not strictly proportional to temperature, because each alloying element had different temperature sensitivity with respect to oxidation rate.
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ISSN:1598-9623
2005-4149
DOI:10.1007/BF03027458