Spheroidized steel microstructure presents a remarkable combination of strength and ductility suitable for cold forming applications. As the commercial spheroidization process consumes a significant amount of time and energy, therefore, suitable degree of spheroidization for specific material must be established to get the desired mechanical properties by utilizing the optimal resources. This is a fairly challenging and technologically expensive process. The recent advances in crystal plasticity modeling and simulations have made it possible to virtually analyze the effect of microscopic attributes on the mechanical response of the crystalline material. This work is a continuation of efforts to achieve a better spheroidization state of medium carbon steel.
In this research, micro-mechanical simulations for three different states of spheroidized steel (C45EC) are carried out under quasi-static tensile loading based on the actual texture and crystallographic orientation from Electron BackScatter Diffraction (EBSD) data. Data denoising is carried out with MTex (open-source Toolbox with MATLAB). A phenomenological constitutive material model with critical plastic strain-based ductile damage criterion is implemented in the DAMASK framework for the ferrite matrix. At the global level, the calibrated material model response matches well with experimental results, with up to ~97% accuracy. Crystal plasticity-based full phase numerical simulations are performed on these constructed Representative Volume Elements (RVEs) to analyze the local stress, strain and damage evolution in C45EC steels. The local results of the simulations exhibit important insights into deformation evolution influenced by the size and clustering of cementite particles as well as crystallographic orientations of ferrite grains. It is observed that the ferrite–cementite interface is prone to damage initiation at earlier stages triggered by the cementite particle clustering. It is concluded that the full phase simulation model helps predict the local microstructural details for overall mechanically improved properties of the steels.


Drop down your comments and questions so I'll know what you're more interested in....

You can follow me on :

Facebook: [ Ссылка ]
Intsgram: [ Ссылка ]
Researchgate: [ Ссылка ]

свернуть