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Meso-Scopic Analysis of Strain Path Change Effect on the Hardening Behavior of Dual-Phase Steel

Title
Meso-Scopic Analysis of Strain Path Change Effect on the Hardening Behavior of Dual-Phase Steel
Authors
Ha, JLee, JKim, JHBarlat, FLee, MG
POSTECH Authors
Barlat, F
Date Issued
Jun-2014
Publisher
WILEY-V C H VERLAG GMBH
Abstract
To study the anisotropic hardening behaviors of dual-phase steels under strain path changes, a meso-scale finite element analysis was considered with the representative volume elements. For the constitutive model, the Homogeneous yield function based on Anisotropic Hardening (HAH model) was used as a phenomenological constitutive equations to describe complex anisotropic material responses in an efficient way. For the martensite inclusions, three different configurations - elongated, large, and small spherical shapes - with two different volume fractions - 10 and 30% - were assumed. In order to represent strain path changes, two loading conditions were considered: tension-compression and tension-orthogonal tension. The simulation results for tension-compression test showed that the Bauschinger ratio increases as the volume fraction of martensite inclusion increases. For the tension-orthogonal tension test, the hard martensite attenuated the transient flow stress characteristics, which were observed in the single ferritic phase. The effect of hard phase inclusion was analytically explained using a simple one-dimensional analysis based on the elastic-linear plastic theory.
Keywords
meso-scale; representative volume element; dual-phase steel; Bauschinger effect; cross-hardening; finite element simulation; PLASTICITY; MODEL; FORMABILITY; PREDICTION
URI
http://oasis.postech.ac.kr/handle/2014.oak/13822
DOI
10.1002/SRIN.201300186
ISSN
1611-3683
Article Type
Article
Citation
STEEL RESEARCH INTERNATIONAL, vol. 85, no. 6, page. 1047 - 1057, 2014-06
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 BARLAT, FREDERIC GERARD
Graduate Institute of Ferrous Technology
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