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The isothermal and cyclic oxidation behaviour of the intermetallic Ti-48Al-2Cr (at.%) alloy were studied at 800 C in air. Emphasis was placed on the effect of microstructures, in a range relevant for practical applications, ie duplex, near gamma, nearly lamellar, and fully lamellar, obtained by various heat treatments. The oxidation kinetics of the intermetallic alloy showed initially the formation of a relatively protective oxide scale. After an exposure time of about 10 h the oxidation rate increased significantly, due to a loss of protectivity of the oxide scale. The growth rate of the oxide scale, as well as its composition, structure and morphology showed no major relation to the microstructure of the base material.

Additional information

Authors: HAANAPPEL V A C, JRC Ispra (IT);HOFMAN R, JRC Ispra (IT);SUNDERKOTTER J D, JRC Ispra (IT);STROOSNIJDER M F, JRC Ispra (IT);GLATZ W, Montanuniversität, Institut für Metallkunde und Werkstoffprüfung, Leoben (AT);CLEMENS H, Plansee Aktiengesellschaft, Reutte (AT)
Bibliographic Reference: Article: Oxidation of Metals (1996)
Record Number: 199710239 / Last updated on: 1997-04-01
Original language: en
Available languages: en