Autocatalysis, Entropic Aspects and the Martensite Transformation Curve in Iron-Base Alloys
AUTOR(ES)
Guimarães, José Roberto Costa, Rios, Paulo Rangel
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
09/01/2017
RESUMO
This study advances a methodology that consolidates the description of time-dependent (isothermal) as well as time-independent (athermal) martensitic transformation curves. Our model is applied in an extended 3-space, thus permitting inclusion of the effects of autocatalysis on nucleation to be distinguished from the initiation of the transformation, as influenced by entropic barriers. Autocatalysis is then considered as a mechanism for circumventing the effect of the latter. The utility of this proposed mathematical formalism was validated with a database consisting of seven different steels that transform athermally or isothermally.
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