Assuring microstructural homegeniety in dual phase and trip steels
Assuring microstructural homegeniety in dual phase and trip steels
The presence of ferrite/pearlite bands in dual phase and TRIP assisted steels is a consequence of microchemical segregation which causes mechanical properties anisotropy. Such inhomogeneous phase distribution produces a lowering of the mechanical properties such as fracture behaviour. This anisotropy is commonly not accounted in micromechanics computations which often assume a random distribution of phases in the solid. The present paper deals with an integral model for this undesirable band formation accounting for the solute segregation caused by solidification, microcomponent diffusion present in the austenitisation process, and the nucleation of the transformed phase in segregated regions. In the present work, the model was applied to two industrial grade dual phase steels and two TRIP assisted steels. The influence of such parameters on band formation is summarised in a number of "band prevention plots", which are aimed at providing the optimum processing conditions for ferrite/pearlite band prevention.
Banding, Ferrite, Modelling, Pearlite, Steel, Toughening, TRIP
711-715
Rivera-Díaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
van der Zwaag, S.
ad11f134-8a43-4635-9feb-7c3d01158f4b
November 2004
Rivera-Díaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
van der Zwaag, S.
ad11f134-8a43-4635-9feb-7c3d01158f4b
Rivera-Díaz-Del-Castillo, P.E.J. and van der Zwaag, S.
(2004)
Assuring microstructural homegeniety in dual phase and trip steels.
Steel Research International, 75 (11), .
(doi:10.1002/srin.200405832).
Abstract
The presence of ferrite/pearlite bands in dual phase and TRIP assisted steels is a consequence of microchemical segregation which causes mechanical properties anisotropy. Such inhomogeneous phase distribution produces a lowering of the mechanical properties such as fracture behaviour. This anisotropy is commonly not accounted in micromechanics computations which often assume a random distribution of phases in the solid. The present paper deals with an integral model for this undesirable band formation accounting for the solute segregation caused by solidification, microcomponent diffusion present in the austenitisation process, and the nucleation of the transformed phase in segregated regions. In the present work, the model was applied to two industrial grade dual phase steels and two TRIP assisted steels. The influence of such parameters on band formation is summarised in a number of "band prevention plots", which are aimed at providing the optimum processing conditions for ferrite/pearlite band prevention.
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Published date: November 2004
Keywords:
Banding, Ferrite, Modelling, Pearlite, Steel, Toughening, TRIP
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Local EPrints ID: 492394
URI: http://eprints.soton.ac.uk/id/eprint/492394
ISSN: 1611-3683
PURE UUID: 52077810-6667-4ffe-8f0e-f71e870fdf50
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Date deposited: 25 Jul 2024 17:00
Last modified: 26 Jul 2024 02:09
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Author:
P.E.J. Rivera-Díaz-Del-Castillo
Author:
S. van der Zwaag
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