Investigation and mean-field modelling of microstructural mechanisms driving the tensile properties of dual-phase steels

被引：8
作者：
Mathevon, Alexandre [1 ]
Fabregue, Damien [1 ]
Massardier, Veronique [1 ]
Cazottes, Sophie [1 ]
Rocabois, Philippe [2 ]
Perez, Michel [1 ]
机构：
[1] Univ Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, Villeurbanne, France
[2] Fives Keods, 102 Ave Liberte, Maisons Alfort, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 822卷
关键词：
Tensile property; Dual-phase; Modelling; Strain-hardening; Martensite; TRANSFORMATION-INDUCED PLASTICITY; ASSISTED MULTIPHASE STEELS; DEFORMATION-BEHAVIOR; HARDENING BEHAVIOR; GRAIN-SIZE; MULTISCALE MECHANICS; CONSTITUENT PHASES; DP-STEELS; STRAIN; MARTENSITE;
D O I：
10.1016/j.msea.2021.141532
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A hybrid composite medium-field (Hy-MFC) model was developed to predict the tensile properties of dual-phase steels under monotonic loading based on physical parameters of the microstructure (phase fraction, chemical composition, and grain size of each phase). The Hy-MFC model is intended to be applicable to a wide range of fully ferritic to fully martensitic steels, particularly for alloy design and production-line monitoring. Accounting for the prior austenitic grain size as well as the chemical composition of martensite in the model resulted in good agreement between the modelling and experimental data for the investigated industrial and ternary steels with various martensite fractions. In addition, electron backscatter diffraction monitoring performed during tensile tests allowed to understand the different interactions necessary to reproduce the macroscopic hardening of dualphase steels. In particular, a hybrid scaling transition law was proposed to reproduce the strain-hardening rate for small deformations for bi-percolant microstructures.
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页数：12
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