Phase-field modelling of microstructure evolution during processing of cold-rolled dual phase steels

Cold-rolled dual-phase steels, which belong to the advanced high strength steels, have gained much interest within the automotive industry. The formation of dual-phase microstructure, which provides an optimal combination of strength and formability for automotive applications, occurs during intercritical annealing of cold-rolled strip. Variations in the chemical composition as well as in the heat treatment parameters influence very strongly the microstructure development and therefore the final mechanical properties of the strip. Thus, the precise control of the microstructure evolution during full processing route is required for the achievement of essential mechanical properties. The current work is focused on a through-process model on a microstructural scale for the production of dual-phase steel from cold-rolled strip, which is based on Phase-Field Method and combines the description of ferrite recrystallisation and all phase transformations occurring during intercritical annealing. This approach will enable the prediction of final microstructure for varying composition and processing conditions, and therefore, can be used for the process development and optimisation.

[1]  J. D. Eshelby,et al.  Anisotropic elasticity with applications to dislocation theory , 1953 .

[2]  M. Mecozzi,et al.  Phase field modelling of the austenite to ferrite transformation in steels , 2007 .

[3]  Martin Bäker,et al.  Numerische Methoden in der Materialwissenschaft , 2009 .

[4]  Jin-dong Huang.  Microstructure evolution during processing of dual phase and TRIP steels , 2004 .

[5]  I. Steinbach,et al.  A phase field concept for multiphase systems , 1996 .

[6]  S. Zwaag,et al.  The Role of Nucleation Behavior in Phase-Field Simulations of the Austenite to Ferrite Transformation , 2008 .

[7]  D. P. Koistinen,et al.  A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels , 1959 .

[8]  F. Roters,et al.  Microstructure and texture evolution in dual-phase steels: Competition between recovery, recrystallization, and phase transformation , 2010 .

[9]  Frédéric Barlat,et al.  Continuum Scale Simulation of Engineering Materials Fundamentals - Microstructures - Process Applications , 2004 .

[10]  U. Prahl,et al.  Failure modeling of multiphase steels using representative volume elements based on real microstructures , 2009 .

[11]  I. Steinbach,et al.  Multiphase-field approach for multicomponent alloys with extrapolation scheme for numerical application. , 2006, Physical review. E, Statistical, nonlinear, and soft matter physics.

[12]  S. Zwaag,et al.  Simulations of pro-eutectoid ferrite formation using a mixed control growth model , 1998 .

[13]  Dierk Raabe,et al.  Deformation and fracture mechanisms in fine- and ultrafine-grained ferrite/martensite dual-phase steels and the effect of aging , 2011 .

[14]  R. Thiessen.  Physically-based modelling of material response to welding , 2006 .

[15]  Y. Tomita.  Effect of morphology of second-phase martensite on tensile properties of Fe-0.1C dual phase steels , 1990 .

[16]  Kalyan Kumar Ray,et al.  Influence of martensite content and morphology on tensile and impact properties of high-martensite dual-phase steels , 1999 .

[17]  M. Calcagnotto,et al.  Ultrafine Grained Ferrite/Martensite Dual Phase Steel Fabricated by Large Strain Warm Deformation and Subsequent Intercritical Annealing , 2008 .

[18]  Matthias Militzer,et al.  Phase field modeling of microstructure evolution in steels , 2011 .

[19]  D. Raabe,et al.  Three-Dimensional Orientation Microscopy in a Focused Ion Beam–Scanning Electron Microscope: A New Dimension of Microstructure Characterization , 2008 .

[20]  M. Calcagnotto,et al.  Orientation gradients and geometrically necessary dislocations in ultrafine grained dual-phase steels studied by 2D and 3D EBSD , 2010 .

[21]  M. Militzer,et al.  Analysis of the Austenite Grain Size Distribution in Plain Carbon Steels , 1999 .

[22]  I. Steinbach.  Phase-field models in materials science , 2009 .

[23]  Wolfgang Bleck,et al.  Phase-Field Modeling of Austenite Formation from a Ferrite plus Pearlite Microstructure during Annealing of Cold-Rolled Dual-Phase Steel , 2011 .

[24]  W. Bleck,et al.  Influence of Martensite Distribution on the Mechanical Properties of Dual Phase Steels: Experiments and Simulation , 2009 .

[25]  G. Gottstein,et al.  Integral materials modelling , 2004 .