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Nucleation of isothermal martensite
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-7656-9733
2000 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 48, no 11, 2777-2785 p.Article in journal (Refereed) Published
Abstract [en]

Two methods of evaluating an activation energy for the nucleation of martensite from kinetic information on isothermal martensite are discussed. In both methods the nucleation is described as thermally activated growth of an embryo up to a size where rapid growth can get started. The first method is based on the absolute Value of the rate of reaction at each separate temperature and depends on the neglect of the reverse reaction. The second method is based on the temperature dependence of the rate at low temperatures and includes the reverse reaction and it typically yields a lower activation energy. It can be used to define the region of low net driving force where the reverse reaction, which is neglected in the first method, is important and that method should not be used. A unified description of the nucleation of athermal and isothermal martensite is also presented.

Place, publisher, year, edition, pages
2000. Vol. 48, no 11, 2777-2785 p.
Keyword [en]
iron alloys, martensite, nucleation, kinetics, activation energy, alloys, ni, transformations, activation, kinetics, mobility
URN: urn:nbn:se:kth:diva-20024ISI: 000089196700002OAI: diva2:338717
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Borgenstam, Annika
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