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High temperature oxidation of thermomechanically treated Ti-47 Al−2Cr−2Nb

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Abstract

Thermomechanically treated Ti−47Al−2Cr−2Nb alloys were oxidized at 800°C, 900°C and 1000°C in air. Various heat treatments done to obtain duplex microstructure and stabilize microstructures did not affect the overall oxidation kinetics and the oxide morphology of the alloys. Alloys oxidized at similar rates formed oxide scales consisting primarily of an outer TiO2 layer, an intermediate Al2O3 layer, and an inner (TiO2+Al2O3) mixed layer. A small amount of dissolved Cr ion was preferentially segregated in the inner oxide layer. Niobium, however, was segregated in not only the inner, but also the outer oxide layer.

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Authors and Affiliations

  1. Center for Advanced Plasma Surface Technology, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, 440-746, Suwon, Korea

    Yu -Dong Jang & Dong -Bok Lee

  2. Structures, Materials and Propulsion Laboratory, Institute for Aerospace Research, National Research Council, K1A 0R6, Ottawa, Ontario, Canada

    Dong -Yi Seo

Authors
  1. Yu -Dong Jang
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  2. Dong -Bok Lee
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  3. Dong -Yi Seo
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Jang, Y.D., Lee, D.B. & Seo, D.Y. High temperature oxidation of thermomechanically treated Ti-47 Al−2Cr−2Nb. Met. Mater. Int. 8, 503–506 (2002). https://doi.org/10.1007/BF03178249

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