3D Micromechanical Modeling of Failure and Damage Evolution in Dual Phase Steel Based on a Real 2D Microstructure
A plate of dual phase steel was produced from low carbon steel with intercritical annealing treatment. Its optically determined surface microstructure was utilized to construct three different microstructural models. To describe the ductile damage in the ferritic matrix, the Gurson-Tvergaard-Needleman model was used with the failure in the martensite phase being ignored. The numerical results obtained for the mechanism of void initiation and coalescence were compared with the experimental observations. The numerical results obtained from the randomly extruded 3D model showed a significantly better agreement with the experimental ones than those obtained from the 2D model or the uniformly extruded 3D model.
Key Wordsdual phase steel 3D model microstructure micromechanical modeling GTN damage model
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- 7.Papaefthymiou, S., Bleck, W., Prahl, U., Acht, C., Sietsma, J. and van der Zwaag, S., Micromechanical damage simulations of TRIP steels. Mater Sci Forum, 2003, 426–432: 1355–1360.Google Scholar
- 16.E562-08, A., Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count, 2008.Google Scholar
- 17.Lawson, R., Matlock, D. and Krauss, G., The effect of microstructure on the deformation behavior and mechanical properties of a dual-phase steel. In: Fundamentals of Dual-Phase Steels, The Metallurgical Society of AMIE, 1981: 347–381.Google Scholar
- 18.Rodriguez, R.M. and Gutiérez, I., Unified formulation to predict the tensile curves of steels with different microstructures. Mater Sci Forum, 2003, 426–432: 4525–4530.Google Scholar
- 19.Thomser, C., Prahl, U., Vegter, H. and Bleck, W., Modelling the mechanical properties of multiphase steels, Computer Methods in Materials Science, 2007, 7: 42–46.Google Scholar
- 24.Tvergaard, V., On localization in ductile materials containing spherical voids. International Journal of Fracture, 1982, 18(4): 237–252.Google Scholar