Iron-based oxide dispersion strengthened alloys: Tensile and creep behavior and its modelling
- Research Centre Juelich GmbH (Germany). Inst. for Materials in Energy Systems
Oxide dispersion strengthened (ODS) alloys have been developed for high creep strength at high temperatures. The iron-base variety, containing about 5% aluminum, additionally exhibits an excellent corrosion resistance at temperatures up to 1,200 C. These alloys are therefore promising materials for high temperature compounds in aggressive environments. The dispersoids are small yttria particles which are significantly more stable than carbides or {gamma}{prime}-precipitates in conventional high temperature alloys. They interact with gliding dislocations by a newly detected mechanism. Its formulation allows stress and temperature dependence of the creep rate of these materials to be modeled. The yttria addition is also responsible for the improved corrosion resistance. In the presentation, the basic processes in iron-base ODS alloys will be outlined and it will be shown to what extent investigations contribute to understand the correlation between physical mechanism and the technologically relevant behavior.
- OSTI ID:
- 403331
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1782-2
- Country of Publication:
- United States
- Language:
- English
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