Plastic deformation behavior and construction of constitutive model in a wide range of strain rates of 800 MPa grade dual phase steel

2018 ◽  
Vol 122 ◽  
pp. 104-117 ◽  
Author(s):  
Hengjun Cai ◽  
Renbo Song ◽  
Long Jiang ◽  
Ran Wei ◽  
Yi Li ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Constitutive Model ◽  
Deformation Behavior ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Strain Rates ◽  
Plastic Deformation Behavior ◽  
Wide Range

Prediction of 3D Microstructure and Plastic Deformation Behavior in Dual-Phase Steel Using Multi-Phase Field and Crystal Plasticity FFT Methods

2015 ◽  
Vol 651-653 ◽  
pp. 570-574 ◽  
Author(s):  
Akinori Yamanaka
Keyword(s):  
Plastic Deformation ◽  
Crystal Plasticity ◽  
Phase Field ◽  
Deformation Behavior ◽  
Fast Fourier Transformation ◽  
Dual Phase ◽  
Dp Steel ◽  
3D Microstructure ◽  
Plastic Deformation Behavior ◽  
Multi Phase

The plastic deformation behavior of dual-phase (DP) steel is strongly affected by its underlying three-dimensional (3D) microstructural factors such as spatial distribution and morphology of ferrite and martensite phases. In this paper, we present a coupled simulation method by the multi-phase-field (MPF) model and the crystal plasticity fast Fourier transformation (CPFFT) model to investigate the 3D microstructure-dependent plastic deformation behavior of DP steel. The MPF model is employed to generate a 3D digital image of DP microstructure, which is utilized to create a 3D representative volume element (RVE). Furthermore, the CPFFT simulation of tensile deformation of DP steel is performed using the 3D RVE. Through the simulations, we demonstrate the stress and strain partitioning behaviors in DP steel depending on the 3D morphology of DP microstructure can be investigated consistently.

Mechanical behavior of DP780 dual phase steel at a wide range of strain rates

2018 ◽  
Vol 5 (9) ◽  
pp. 096519 ◽  
Author(s):  
Shengci Li ◽  
Lan Zhang ◽  
Hongjin Zhao ◽  
Liang Qi ◽  
Yonglin Kang
Keyword(s):  
Mechanical Behavior ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Strain Rates ◽  
Wide Range

scholarly journals Energy absorbing properties of a steel profile made of dual phase steel

2018 ◽  
Vol 183 ◽  
pp. 01062
Author(s):  
Wojciech Moćko ◽  
Adam Brodecki
Keyword(s):  
Dual Phase Steel ◽  
Testing Machine ◽  
Dual Phase ◽  
Strain Rates ◽  
Bending Tests ◽  
Three Point Bending ◽  
Numerical Predictions ◽  
Steel Material ◽  
Wide Range ◽  
Energy Absorbing

Three point bending tests were carried out using a drop tower testing machine. Profile were made of 2 mm dual phase steel. Material was characterized at wide range of strain rates to calibrate Rusinek-Klepaczko constitutive model. Finally, experimental results were compared with numerical predictions obtained using finite element method.

Deformation Behaviors and Constitutive Model of DP1000 under Different Strain Rates

2017 ◽  
Vol 898 ◽  
pp. 810-817 ◽  
Author(s):  
Ran Wei ◽  
Ren Bo Song ◽  
Long Jiang ◽  
Heng Jun Cai
Keyword(s):  
Constitutive Model ◽  
Strain Rate ◽  
Strain Hardening ◽  
Dual Phase Steel ◽  
Constitutive Models ◽  
Rate Sensitivity ◽  
Dual Phase ◽  
Strain Rates ◽  
Deformation Behaviors ◽  
Means Of Transmission

The DP1000 cold-rolled dual phase steel, the thickness of which is 1.2 mm, was required to do the tensile test under nine different strain rates from 10-4 s-1 to 1000 s-1. The mechanical properties and morphologies of the steel were obtained and analyzed. According to the C-J model, the plastic deformation characteristics of dual phase steel under different strain rates were studied. By means of transmission electron microscope (TEM), the morphologies of ferrite and martensite in the dynamic were observed. Finally, the constitutive models of quasi-static and high strain rate were established by using the modified Johnson-Cook model. The results reveal that DP1000 dual phase steel has obvious strain rate sensitivity, and it is a relatively pure ferrite and martensite dual phase structure. There are two stage strain hardenging characteristics in DP1000. In the first stage, the strain hardening ability of ferrite is higher, and the second stage is martensite deformation stage, the strain hardening ability is lower. The modified J-C constitutive model has high fitting effect, and the experimental results are matched with the fitting values.

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