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On the growth of ferrite allotriomorphs in fe-c alloys
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Physics.
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1992 (English)In: Zeitschrift für Metallkunde, ISSN 0044-3093, Vol. 83, no 10, 729-738 p.Article in journal (Refereed) Published
Abstract [en]

Different geometrical models of allotriomorphic growth of ferrite in undercooled austenite are investigated by means of numerical and analytical treatments of diffusional growth under local equilibrium. The results obtained by the numerical method are compared with analytical solutions for those cases where such solutions may be derived. An excellent agreement is obtained. The numerical method is subsequently applied to simulate the experiments by Aaronson et al. and some more recent experiments by Hougardy et al.. taking into account the concentration dependence of the diffusivity of C in austenite and the most recent thermodynamic assessment of the ferrite/austenite equilibrium. Taking into account the experimental uncertainties we conclude that the growth of allotriomorphic ferrite must be essentially controlled by long-range carbon diffusion in austenite.

Place, publisher, year, edition, pages
1992. Vol. 83, no 10, 729-738 p.
Keyword [en]
KINETICS, AUSTENITE
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-13390ISI: A1992KA64500003OAI: oai:DiVA.org:kth-13390DiVA: diva2:325034
Note
QC 20100617Available from: 2010-06-17 Created: 2010-06-17 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Computer simulation of diffusion controlled transformations in multicomponent alloys
Open this publication in new window or tab >>Computer simulation of diffusion controlled transformations in multicomponent alloys
1997 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 1997. 17 p.
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-2481 (URN)91-7170-790-5 (ISBN)
Public defence
1997-03-01, 00:00
Note
QC 20100617Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2010-06-17Bibliographically approved

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