Microstructure‐Based Modeling of Mechanical Properties and Deformation Behavior of DP600 Dual Phase Steel

Abstract

Herein, the modeling approach for predicting the work hardening flow curve of DP600 steels from the real microstructure and comparison between micromechanical modeling and experimental shear loading are described. A real microstructure-based model by representative volume element (RVE) method is used to evaluate the microstructure deformation. The flow behavior of ferrite and martensite single phase is predicted by a dislocation-based model. Results show that the work hardening predicted by the simulation under shear loading condition is consistent with the experimental data. An increased carbon in ferrite phase can increase the strength and strain hardening rate of a given steel. Simulation indicates that the strain is mainly concentrated in the ferrite, and the plastic strain localization is mainly located at the ferrite grains along the phase boundaries; martensite carries most of the stress. The distribution and morphology of martensite affect the deformation behavior of dual phase (DP) steel. A predominant shear failure mode is developed and instability occurs under uniaxial loading.

Nanomechanical Characterization of the Deformation Response of Orthotropic Ti–6Al–4V

“…[11][12][13][14][15][16] Several manufacturing processes among the aforementioned applications contemplate the implementation of material characterization procedures, either on pristine samples of the material or on previously manufactured parts. The most commonly applied experimental procedures to identify the macroscopic orthotropic elastoplastic properties of a material include monotonic tensile, [17,18] compression, [19,20] and shear [21,22] tests of material samples obtained from its orthogonal directions. The main limitations of these tests are the size of the specimens and their subsequent destruction,…”

Stress-strain distribution and failure mechanisms in dual-phase steels investigated with microstructure-based modeling

“…Table 2. Chemical composition of DP600, DP800, and DP1000 steels (wt-%), similar as Li et al, (2019). Moreover, the flow curves of the ferrite and martensite single phases calculated based on the model equations 1 and 2, and used parameters listed in Tables 2 and 3, are shown in Figure 4.…”

“…Latin American Journal of Solids and Structures, 2022, 19(7), e468 6/21 All the values for each parameter for the constitutive description of a single phase are summarized in Table 3 and the descriptions of each term were given in the notation list. The concept of tables 2 and 3 is similar to the works tables of Li et al, (2019).…”

“…Parameters for the constitutive description of each single phase for DP600, DP800, and DP1000 steel, similar asLi et al, (2019).…”

Assessment of micro-indentation method in the characterization of DP600 behavior using a proposed martensite distribution parameter in FEM simulation approach

“…In artificial RVEs, there are a lot of mechanical testing methods implemented to evaluate the mechanical response like tension, compression, torsion, or fatigue. These tests are the most commonly used throughout recent research (Anbarlooie et al, 2019;Basantia et al, 2021;Chiyatan & Uthaisangsuk, 2020;Hou et al, 2019;Li et al, 2019;Moeini et al, 2018;Moeini, Ramazani, Myslicki et al, 2017;Qin et al, 2020;Qin et al, 2018). In those simulations, using the correct combination of boundary conditions and constitutive equations allows approximating the macroscale behavior of the whole material.…”