On the growth of ferrite allotriomorphs in fe-c alloys
1992 (English)In: Zeitschrift für Metallkunde, ISSN 0044-3093, Vol. 83, no 10, 729-738 p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-13390ISI: A1992KA64500003OAI: oai:DiVA.org:kth-13390DiVA: diva2:325034
QC 201006172010-06-172010-06-172010-06-17Bibliographically approved