Abstract
Abstract. In the present paper various experimental procedures to experimentally determine the
concentration dependent diffusion coefficient of carbon in expanded austenite are evaluated. To this
end thermogravimetric carburization was simulated for various experimental conditions and the
evaluated composition dependent diffusivity of carbon derived from the simulated experiments was
compared with the input data. The most promising procedure for an accurate determination is
shown to be stepwise gaseous carburizing of thin foils in a gaseous atmosphere; the finer the
stepsize, the more accurate the approximation of the diffusivity. Thermogravimetry was applied to
continuously monitor the weight change of thin foils of AISI 316 during carburizing in CO-H2 gas
mixtures for one of the simulated experimental procedures.
| Original language | English |
|---|---|
| Journal | Defect and Diffusion Forum |
| Volume | 273-276 |
| Pages (from-to) | 306-311 |
| ISSN | 1012-0386 |
| Publication status | Published - 2008 |
Keywords
- Stainless steel
- Kinetics
- Diffusion