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The oxidation behaviour of Ti-47Al-2Cr-0.2Si and Ti-48Al-2Cr-2Nb (at.%), with a fine-grained near-gamma microstructure was studied at 700 and 800 C in comparison with Ti-48Al-2Cr. Isothermal and cyclic oxidation tests were performed either in humidified synthetic air or in static laboratory air. Ti-48Al-2Cr-2Nb showed the lowest oxidation rate and the highest spallation resistance. For Ti-47Al-2Cr-0.2Si a low isothermal oxidation rate, but pronounced susceptibility for oxide spallation was found. The niobium-free and silicon free alloy Ti-48Al-2Cr showed a high isothermal oxidation rate, however, spallation was between the 2 extremes represented by Ti-48Al-2Cr-2Nb and Ti-47Al-2Cr-0.2Si.

Additional information

Authors: SUNDERKOTTER J D ET AL, JRC Ispra (IT);SCHMUTZLER H J, ABB Brown Bovere AG, Corporate Research Centre, Heidelberg (DE);HOFMAN R, Delft University of Technology (NL);GLATZ W ET AL, Plansee AG, Technology Centre, Reutte (AT)
Bibliographic Reference: Article: Intermetallics (1997)
Record Number: 199710481 / Last updated on: 1997-05-09
Original language: en
Available languages: en