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Grain boundary oxidation processes and high temperature corrosion
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Auinger, Michael (2010) Grain boundary oxidation processes and high temperature corrosion. In: GTT Annual Workshop 2010, Herzogenrath, Aachen, Germany, 16-18 Jun 2010
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Official URL: http://gtt.mch.rwth-aachen.de/gtt-web/Consulting/W...
Abstract
The formation of grain boundary and inner oxides at high temperatures has a significant
impact on the mechanical properties of metallic substrates. Large amounts of oxides along
the boundary layers often induce mechanical strain and affect the connectivity between the
grains. As an ultimate result, some grains may fall off, which leads to roughening and the
necessity of additional treatments to obtain the desired surface-finish.
The current research, which is a further development of the programme InCorr (GTTTechnologies
and the University of Siegen, Germany), aims to give insight into the
composition of oxidic phases in hot-rolled steel samples. Alloying elements like chromium,
manganese, silicon and aluminium were considered due to their high importance in modern
steel design.
Simulations were composed as a subsequent 2-step based algorithm, consisting of element
migration and chemical reactions. Whilst the migration of the chemical species (i.e. iron,
oxygen and the alloying elements) has been determined to be the rate limiting step, the
chemical reactions were considered to be in local thermodynamic equilibrium under
manufacturing conditions. Hence their amounts can be derived from the thermodynamic
dataset from the FactSage programme.
The results can be summarised as a two dimensional map, indicating the amount and spatial
distribution of each phase in a given sample microstructure. Additionally, these findings will
be compared to experimental measurements and a short outlook of future plans will be
presented.
| Item Type: | Conference Item (Speech) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
| Official Date: | 2010 | ||||
| Dates: |
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| Status: | Not Peer Reviewed | ||||
| Conference Paper Type: | Speech | ||||
| Title of Event: | GTT Annual Workshop 2010 | ||||
| Type of Event: | Workshop | ||||
| Location of Event: | Herzogenrath, Aachen, Germany | ||||
| Date(s) of Event: | 16-18 Jun 2010 | ||||
| Related URLs: |
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