Influence de l'état mécanique d'un alliage réfractaire sur sa réactivité à haute température.
Résumé
The aim of this work is the reactivity of a ferritic alloy studied considering both chemical and mechanical evolutions "versus" time between 800 and 1300°C in air. A singular strength behaviour is showed at 900°C in isothermal conditions whereas an accelerated oxidation is visible at the same temperature. The evolution of the Young's modulus and thermal expansion studies explained these anomalies with carbides precipitation.