A thermostatistical theory for solid solution effects in the hot deformation of alloys: an application to low-alloy steels
A thermostatistical theory for solid solution effects in the hot deformation of alloys: an application to low-alloy steels
The hot deformation of low-alloy steels is described by a thermostatistical theory of plastic deformation. This is based on defining a statistical entropy term that accounts for the energy dissipation due to possible dislocation displacements. In this case, dilute substitutional and interstitial atom effects alter such paths. The dislocation population is described by a single parameter equation, with the parameter being the average dislocation density. Solute effects incorporate additional dislocation generation sources. They alter the energy barriers corresponding to the activation energies for dislocation recovery, grain nucleation and growth. The model is employed to describe work hardening and dynamic recrystallization softening in fifteen steels for a wide range of compositions, temperatures and strain rates. Maps for dynamic recrystallization occurrence are defined in terms of processing conditions and composition.
austenite, dislocation theory, dynamic recrystallization, grain growth, low-alloy steels, solid solution strengthening, statistical thermodynamics
Galindo-Nava, E.I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
Perlade, A.
473f35f0-bff3-4cea-a0e6-cf084de8284d
Rivera-Díaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
16 December 2013
Galindo-Nava, E.I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
Perlade, A.
473f35f0-bff3-4cea-a0e6-cf084de8284d
Rivera-Díaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Galindo-Nava, E.I., Perlade, A. and Rivera-Díaz-Del-Castillo, P.E.J.
(2013)
A thermostatistical theory for solid solution effects in the hot deformation of alloys: an application to low-alloy steels.
Modelling and Simulation in Materials Science and Engineering, 22 (1), [015009].
(doi:10.1088/0965-0393/22/1/015009).
Abstract
The hot deformation of low-alloy steels is described by a thermostatistical theory of plastic deformation. This is based on defining a statistical entropy term that accounts for the energy dissipation due to possible dislocation displacements. In this case, dilute substitutional and interstitial atom effects alter such paths. The dislocation population is described by a single parameter equation, with the parameter being the average dislocation density. Solute effects incorporate additional dislocation generation sources. They alter the energy barriers corresponding to the activation energies for dislocation recovery, grain nucleation and growth. The model is employed to describe work hardening and dynamic recrystallization softening in fifteen steels for a wide range of compositions, temperatures and strain rates. Maps for dynamic recrystallization occurrence are defined in terms of processing conditions and composition.
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Accepted/In Press date: 19 November 2013
Published date: 16 December 2013
Keywords:
austenite, dislocation theory, dynamic recrystallization, grain growth, low-alloy steels, solid solution strengthening, statistical thermodynamics
Identifiers
Local EPrints ID: 492473
URI: http://eprints.soton.ac.uk/id/eprint/492473
ISSN: 0965-0393
PURE UUID: 9e8b46ac-ffd6-479f-86a8-5148ab2ad83c
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Date deposited: 29 Jul 2024 16:58
Last modified: 30 Jul 2024 02:06
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Contributors
Author:
E.I. Galindo-Nava
Author:
A. Perlade
Author:
P.E.J. Rivera-Díaz-Del-Castillo
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