Modelling the kinetics of strain induced precipitation in Nb microalloyed steels

Strain induced precipitation is a key phenomenon that controls the microstructure evolution during the finish rolling stages of microalloyed steels. Extensive research has shown that the precipitation of Nb(CN) delays the onset of recrystallisation. This paper presents a model to describe the precip...

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Published in:Acta materialia 2001-03, Vol.49 (5), p.785-794
Main Authors: Dutta, B., Palmiere, E.J., Sellars, C.M.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Diffusion
Exact sciences and technology
Kinetics
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitation
Solid-phase precipitation
Steels
Theory & modelling
Thermomechanical processing
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description Strain induced precipitation is a key phenomenon that controls the microstructure evolution during the finish rolling stages of microalloyed steels. Extensive research has shown that the precipitation of Nb(CN) delays the onset of recrystallisation. This paper presents a model to describe the precipitation kinetics during isothermal holding following high temperature deformation in Nb-containing steels. The model is based on the assumption that heterogeneous nucleation of precipitates on dislocations and enhanced coarsening due to pipe diffusion are responsible behind the accelerated kinetics observed in strain induced precipitation. Results show a very good agreement between reported experimental observations and predictions of the present model for precipitate size and volume fraction evolution.
doi_str_mv 10.1016/S1359-6454(00)00389-X
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subjects Applied sciences
Cross-disciplinary physics: materials science
rheology
Diffusion
Exact sciences and technology
Kinetics
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitation
Solid-phase precipitation
Steels
Theory & modelling
Thermomechanical processing
title Modelling the kinetics of strain induced precipitation in Nb microalloyed steels
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