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Model of Precipitation Kinetics Induced by Strain for Microalloyed Steels
Author(s) -
Medina Sebastián F.,
Quispe Alberto,
Gómez Manuel
Publication year - 2005
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200506049
Subject(s) - microalloyed steel , materials science , precipitation , metallurgy , isothermal process , kinetics , nitrogen , strain (injury) , thermodynamics , microstructure , chemistry , austenite , medicine , physics , organic chemistry , quantum mechanics , meteorology
In microalloyed steels, static recrystallisation is temporarily inhibited by precipitation which is occurring at the same time. A high number of microalloyed steels containing various combinations of carbon, nitrogen and precipitate forming elements like V, Nb and Ti were recrystallised at different temperatures and strain rates. From these results recrystallisation‐precipitation–time‐temperature (RPTT) diagrams were established. The influence of grain size and strain rate on the RPTT diagrams was studied. The precipitation kinetics were mathematically described for isothermal conditions and converted to cooling conditions, which enables an application to hot rolling. Under cooling conditions, completion of recrystallisation is prevented, especially for Nb alloyed steels.