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On the formation of Widmanstätten ferrite in binary Fe-C - Phase-field approach
KTH.
KTH.
2004 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 52, no 13, p. 4055-4063Article in journal (Refereed) Published
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Abstract [en]

A phase-field method, based on a Gibbs energy functional, is formulated for γ→α transformation in Fe-C. The derived phase-field model reproduces the following important types of phase transitions: from C diffusion controlled growth through Widmanstätten microstructures to massive growth without partitioning of C. Applying thermodynamic functions assessed by the Calphad technique and diffusional mobilities available in the literature, we study two-dimensional growth of ferrite side plates emanating from an austenite grain boundary. The morphology of the ferrite precipitates is defined by a highly anisotropic interfacial energy. As large values of anisotropy lead to an ill-posed phase-field equation we present a regularization method capable of circumvent non-differentiable domains of interfacial energy.

Place, publisher, year, edition, pages
2004. Vol. 52, no 13, p. 4055-4063
Keywords [en]
Diffusion, Morphological instability, Phase-field method, Widmanstätten plates
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:sh:diva-30399DOI: 10.1016/j.actamat.2004.05.033Scopus ID: 2-s2.0-3042710965OAI: oai:DiVA.org:sh-30399DiVA, id: diva2:940107
Available from: 2016-06-20 Created: 2016-06-20 Last updated: 2017-11-28Bibliographically approved

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Amberg, Gustav

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Citation style
  • apa
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  • harvard-anglia-ruskin-university
  • apa-old-doi-prefix.csl
  • sodertorns-hogskola-harvard.csl
  • sodertorns-hogskola-oxford.csl
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf