Autocatalysis, Entropic Aspects and the Martensite Transformation Curve in Iron-Base Alloys

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 dist...

Full description

Saved in:
Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2017-01, Vol.20 (1), p.271-278
Main Authors: Guimarães, José Roberto Costa, Rios, Paulo Rangel
Format: Article
Language:English
Subjects:
athermal martensite
Autocatalysis
ENGINEERING, CHEMICAL
Formalism
isothermal martensite
kinetics
Martensitic transformations
MATERIALS SCIENCE, MULTIDISCIPLINARY
Mathematical models
METALLURGY & METALLURGICAL ENGINEERING
Nucleation
phase transformations
Transformations
Transformations (mathematics)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-mr-2016-0462