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Put, Aurélie Rouaix-Vande
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Publications (5/5 displayed)
- 2017Relevance of other parameters than carbon activity in defining the severity of a metal dusting environmentcitations
- 2017Chromium and iridium effects on the short-term interdiffusion behaviour between Pt rich γ-γ′ bond-coatings and a Ni-Al-Cr alloycitations
- 2014Cyclic Oxidation Behavior of TBC Systems with a Pt-Rich γ-Ni+γ′-Ni3Al Bond-Coating Made by SPScitations
- 2012Mechanistic-Based Lifetime Predictions for High-Temperature Alloys and Coatingscitations
- 2012Inhibited aluminization of an ODS FeCr alloycitations
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article
Relevance of other parameters than carbon activity in defining the severity of a metal dusting environment
Abstract
Two metal dusting experiments were carried out at 570 °C on 800HT and HR120 alloys, for more than 6000 h. The tests were designed to run at different total pressures and gas velocities but similar carbon activities and oxygen partial pressures. For a given alloy, shorter average incubation times and larger mass losses were observed at high pressure. For both tests, HR120 alloy underwent greater mass losses and exhibited a higher pit density. For nearly all samples, pit densities greatly differed between both sides of the specimens. Therefore, the carbon and oxygen activities alone are not sufficient to evaluate the aggressiveness of a metal dusting environment. Greater degradation was the result of the association of a higher gas velocity with a higher total pressure and a finer alloy grain size.