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Micromechanical Modeling of Two-Phase Steels

Published online by Cambridge University Press:  21 March 2011

Mikael Nygårds ,
Dilip Chandrasekaran  and
Peter Gudmundson
Mikael Nygårds
Affiliation:
Department of Solid Mechanics Royal Institute of Technology 100 04 Stockholm, SWEDEN
Dilip Chandrasekaran
Affiliation:
Department of Materials Science and Engineering Royal Institute of Technology 100 04 Stockholm, SWEDEN
Peter Gudmundson
Affiliation:
Department of Solid Mechanics Royal Institute of Technology 100 04 Stockholm, SWEDEN
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Abstract

A two-dimensional micromechanical model based on the finite element method is presented to model two-phase ferritic/pearlitic steels, by aid of generalised plane strain elements. A periodic representative cell containing 100 ferrite grains, and the desired fraction pearlite is used. By applying periodic boundary conditions, loading by an average stress or strain state is possible.

Uniaxial tensile tests were performed on specimens containing the ferrite and pearlite microstructures, and on two-phase materials containing 25% and 58% pearlite respectively. The stress-strain data of the pearlite material is used to fit a laminar dependent Taylor relation to represent the pearlite workhardening. Thereafter, laminar spacings in the two-phase materials are measured, and the total stress-strain response of the materials is modelled. Comparisons between generated data and experiments show good agreement up to a strain of 2%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 653: Symposium Z – Multiscale Modeling of Materials-2000 , 2000 , Z8.8
Copyright
Copyright © Materials Research Society 2001

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