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Assurring microstructural homogeniety in dual phase and trip steels

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

Published
Publication date2004
Host publicationMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics: Proceedings of the Sixth International Conference for Mesomechanics
EditorsG.C. Sih, T.B. Kermanidis, S.G. Pantelakis
Pages261-265
Number of pages5
<mark>Original language</mark>English
EventMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics - Patras, Greece
Duration: 31/05/20044/06/2004

Conference

ConferenceMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics
Country/TerritoryGreece
CityPatras
Period31/05/044/06/04

Conference

ConferenceMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics
Country/TerritoryGreece
CityPatras
Period31/05/044/06/04

Abstract

The presence of ferrite/pearlite bands in dual phase and TRIP assisted steels is a consequence of micro-chemical segregation which causes mechanical properties anisotropy. Such inhomogeneous phase distribution produces a lowering of the mechanical properties such as fracture behaviour. This anisotropy is commoly not accounted in micromechanics computation 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.