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Metallurgical and Materials Transactions A
Published in: Metallurgical and Materials Transactions A 9/2014

01-08-2014

Concentration-Dependent Carbon Diffusivity in Austenite

Authors: Xiaoting Gu, Gary M. Michal, Frank Ernst, Harold Kahn, Arthur H. Heuer

Published in: Metallurgical and Materials Transactions A | Issue 9/2014

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Abstract

The diffusion coefficient of carbon in austenite depends on the local carbon concentration. This concentration dependence is particularly noticeable during low-temperature “paraequilibrium” carburization. A critical review of the extensive literature on this topic reveals that an early paper by Asimow provides an excellent description of this substantial concentration dependence. The present analysis suggests that the marked concentration dependence of carbon diffusivity is most likely due to interstitial carbon decreasing the activation energy for carbon jumps from one interstitial site to its neighbor.
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Appendix
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Metadata
Title
Concentration-Dependent Carbon Diffusivity in Austenite
Authors
Xiaoting Gu
Gary M. Michal
Frank Ernst
Harold Kahn
Arthur H. Heuer
Publication date
01-08-2014
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 9/2014
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-014-2347-5

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