Three dimensional elasto-plastic phase field simulation of martensitic transformation in polycrystal

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 556; pp. 221 - 232
• Main Authors: Malik, Amer, Yeddu, Hemantha Kumar, Amberg, Gustav, Borgenstam, Annika, Ågren, John
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 30.10.2012; Elsevier
• Subjects: Accommodation; Computer simulation; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Defects and impurities in crystals; microstructure; Exact sciences and technology; Finite element method; Grain and twin boundaries; Martensitic transformation; Martensitic transformations; Materials science; Mathematical analysis; Mathematical models; Microstructure evolution; Parents; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase field modeling; Phase transformations; Physics; Polycrystal; Structure of solids and liquids; crystallography; Three dimensional; Finite element method; Martensitic transformation; Phase field modeling; Microstructure evolution; Polycrystal; Grain boundaries; Phase field model; Crystal defects; Digital simulation; Martensitic transformations; Polycrystals; Boundary conditions; Plastic deformation; Phase field method; Time dependence; Stress distribution; Stress effects; Microstructure; Martensite
• ISSN: 0921-5093; 1873-4936; 1873-4936
• DOI: 10.1016/j.msea.2012.06.080

The Phase Field Microelasticity model proposed by Khachaturyan is used to perform 3D simulation of Martensitic Transformation in polycrystalline materials using finite element method. The effect of plastic accommodation is investigated by using a time dependent equation for evolution of plastic deformation. In this study, elasto-plastic phase field simulations are performed in 2D and 3D for different boundary conditions to simulate FCC→BCT martensitic transformation in polycrystalline Fe-0.3%C alloy. The simulation results depict that the introduction of plastic accommodation reduces the stress intensity in the parent phase and hence causes an increase in volume fraction of the martensite. Simulation results also show that autocatalistic transformation initiates at the grain boundaries and grow into the parent phase. It has been concluded that stress distribution and the evolution of microstructure can be predicted with the current model in a polycrystal.