Please use this identifier to cite or link to this item: http://elar.usfeu.ru/handle/123456789/8944
Title: Critical grain size in the γ→α martensite transformation. Thermodynamic analysis with regard to spatial scales characteristic of martensite nucleation
Authors: Kashchenko, M. P.
Chashchina, V. G.
Issue Date: 2010
Publisher: Springer New York LLC
Citation: Kashchenko, M. P. Critical grain size in the γ→α martensite transformation. Thermodynamic analysis with regard to spatial scales characteristic of martensite nucleation / M. P. Kashchenko, V. G. Chashchina // Physical Mesomechanics. – 2010. – Vol. 13. – Iss. 3-4. – P. 189-194.
Abstract: In the work, it is shown that taking into account the ratio of spatial scales characteristic of martensite crystal nucleation in the elastic field of an individual dislocation localized in a grain of diameter D makes it possible (i) to estimate the critical grain size Dc (∼1 μm) characteristic of the γ→α transformation at a martensite starting temperature Ms ∼ 100K from the requirements that threshold strain arises in the elastic region, (ii) to consistently describe the D dependence of Ms with Ms(Dc)=0 from analysis of the phase free energy difference, (iii) to express Dc through macroparameters and interpret the limiting case Ms∞→0, Dc→∞ (Dc ∼ (Ms∞)-1 with Ms∞≡Ms (∞)), and (iv) to more exactly specify the qualitative dynamic model of the effect of dislocation grain boundaries on the onset of initial excitation. © 2010.
Keywords: GRAIN SIZE
MARTENSITE TRANSFORMATION
NUCLEATION
URI: http://elar.usfeu.ru/handle/123456789/8944
DOI: 10.1016/j.physme.2010.07.012
SCOPUS: 2-s2.0-77956103641
WoS: WOS:000282202600012
RSCI: 15323561
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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