Journal of Materials Science

, Volume 22, Issue 4, pp 1206–1214 | Cite as

Influence of alloying elements on the dissolution of oxygen in the metallic phase during the oxidation of titanium alloys

  • A. M. Chaze
  • C. Coddet
Papers

Abstract

In order to study the influence of aluminium, chromium and silicon on the dissolution of oxygen in the metallic phase during the oxidation of titanium-based alloys, unalloyed titanium Ti35 and the alloys Ti-Al (1.65, 3, 5 and 10% by weight of aluminium), Ti-Cr (1, 4, 11 and 19% by weight of chromium) and Ti-Si (0.25, 0.5 and 1% by weight of silicon) were oxidized in air and in oxygen for durations of up to several thousand hours, between 550 and 700° C. The influence of the alloying elements was studied using microhardness measurements in the metallic zone just beneath the oxide. It was observed that aluminium and silicon cause a significant reduction in the amount of oxygen dissolved in the metallic phase whereas the effect of chromium is negligible. A comparison of the oxidation behaviour of unalloyed titanium in air and in oxygen reveals the marked influence of nitrogen on the dissolution of oxygen into the substrate, causing a reduction in the amount of dissolved oxygen. In addition, for oxidation of the alloys in air, a synergistic effect is observed, particularly between nitrogen and silicon.

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Copyright information

© Chapman and Hall Ltd 1987

Authors and Affiliations

  • A. M. Chaze
    • 1
  • C. Coddet
    • 1
  1. 1.Laboratoire de Métallurgie et Physico-chimie des Matériaux, (UA CNRS 849)Université de CompiègneCompiegne cedexFrance

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