Using DAMASK for modeling multiphase steels to understand local deformation and damage

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.
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[@prajna_meher]

Thanks Mr. Faisal. You did an excellent job explaining such a difficult topic. Can you do a free tutorial and show us your work flow, plz?

[@FaisalQayyum]

Workflow of the simulations or the post-processing and making a presentation?

[@gyanaranjanmishra3293]

@@FaisalQayyum Setting up config files for simulations using EBSD data along with running the DAMASK simulations will be really helpful.

[@bqwei2417]

nice presentation

[@maziartour]

Great video Dr Faisal. I had a question. Is there any physics-based DAMASK code avilable online that we can use? Such as dislocation-density-based, or nonlocal crystal plasticity

[@FaisalQayyum]

Yes there is. Please visit Damask2.mpie.de and damask.mpie.de . I also provide private consultancy for setting up crystal plasticity simulations according to specific requirements. We can have a discussion of you need more personalized help. Contact me at [e-mail] for that.

[@CWang-mo6up]

Thanks Mr. Faisal for the presentation. Can you help me set up the damage model? I used the example file in damask, the information of f_phi is reasonable, but phi remains 1 during deformation. Is there any steps other than setting up damage in phase and output phi in homogenization?

[@FaisalQayyum]

Yes I can, can you please share more details at [e-mail]?

[@Bobi-bt4tq]

Dear Mr. Faisal.Can you do show us how to set up the damage model in damask3.0?Meanwhile, how to derived damage result? It will help us a lot! Thank you!

[@CWang-mo6up]

Any idea how to set up the damage model? I used the example file in damask but cannot get damage information.

[@jairoalbertomunoz471]

Please, Is it possible a video tutorial to install the program in windows? Regards Jairo Muñoz