Modelling austenite flow curves in low alloy and microalloyed steels

C. A. Hernandez; S. F. Medina; J. Ruiz

doi:10.1016/1359-6454(95)00153-4

Modelling austenite flow curves in low alloy and microalloyed steels

C. A. Hernandez, S. F. Medina, J. Ruiz

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Abstract

A model has been developed to predict the austenite flow curves of low alloy and microalloyed steels. The model consists basically of two expressions for stress, as a function of strain, temperature, strain rate and the chemical composition of the steel. The first predicts the hardening and dynamic recovery region and the second predicts the softening caused by dynamic recrystallization, the algebraic sum of both expressions predicting the complete flow curve. The model's different parameters are a function of the dimensionless parameter Z/A of Sellars and Tegart's equation, which in turn has been modelled not only as a function of temperature and strain rate but also as a function of the chemical composition. In this way one single model may be applied to any hot deformed steel whose composition is the same as or similar to those studied.

Original language	English
Pages (from-to)	155-163
Number of pages	9
Journal	Acta Materialia
Volume	44
Issue number	1
DOIs	https://doi.org/10.1016/1359-6454(95)00153-4
State	Published - Jan 1996
Externally published	Yes

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title = "Modelling austenite flow curves in low alloy and microalloyed steels",

abstract = "A model has been developed to predict the austenite flow curves of low alloy and microalloyed steels. The model consists basically of two expressions for stress, as a function of strain, temperature, strain rate and the chemical composition of the steel. The first predicts the hardening and dynamic recovery region and the second predicts the softening caused by dynamic recrystallization, the algebraic sum of both expressions predicting the complete flow curve. The model's different parameters are a function of the dimensionless parameter Z/A of Sellars and Tegart's equation, which in turn has been modelled not only as a function of temperature and strain rate but also as a function of the chemical composition. In this way one single model may be applied to any hot deformed steel whose composition is the same as or similar to those studied.",

author = "Hernandez, {C. A.} and Medina, {S. F.} and J. Ruiz",

note = "Funding Information: Acknowledgements-This work has been undertaken in CENIM (Madrid) and the authors are grateful for the financial support of the DGICYT of Spain (Project PB89-0022). Hernandez{\textquoteright}s studies are sponsored by the UNAM (Mexico).",

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AU - Hernandez, C. A.

AU - Medina, S. F.

AU - Ruiz, J.

N1 - Funding Information: Acknowledgements-This work has been undertaken in CENIM (Madrid) and the authors are grateful for the financial support of the DGICYT of Spain (Project PB89-0022). Hernandez’s studies are sponsored by the UNAM (Mexico).

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N2 - A model has been developed to predict the austenite flow curves of low alloy and microalloyed steels. The model consists basically of two expressions for stress, as a function of strain, temperature, strain rate and the chemical composition of the steel. The first predicts the hardening and dynamic recovery region and the second predicts the softening caused by dynamic recrystallization, the algebraic sum of both expressions predicting the complete flow curve. The model's different parameters are a function of the dimensionless parameter Z/A of Sellars and Tegart's equation, which in turn has been modelled not only as a function of temperature and strain rate but also as a function of the chemical composition. In this way one single model may be applied to any hot deformed steel whose composition is the same as or similar to those studied.

AB - A model has been developed to predict the austenite flow curves of low alloy and microalloyed steels. The model consists basically of two expressions for stress, as a function of strain, temperature, strain rate and the chemical composition of the steel. The first predicts the hardening and dynamic recovery region and the second predicts the softening caused by dynamic recrystallization, the algebraic sum of both expressions predicting the complete flow curve. The model's different parameters are a function of the dimensionless parameter Z/A of Sellars and Tegart's equation, which in turn has been modelled not only as a function of temperature and strain rate but also as a function of the chemical composition. In this way one single model may be applied to any hot deformed steel whose composition is the same as or similar to those studied.

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Modelling austenite flow curves in low alloy and microalloyed steels

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