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Effects of External Stresses on the Martensitic Transformation in a 3D Polycrystalline Material Using the Phase Field Method

Published online by Cambridge University Press:  05 April 2013

Amer Malik ,
Gustav Amberg  and
John Ågren
Amer Malik
Affiliation:
Department of Mechanics, Royal Institute of Technology, Osquars Backe 18, Stockholm, 10044, Sweden.
Gustav Amberg
Affiliation:
Department of Mechanics, Royal Institute of Technology, Osquars Backe 18, Stockholm, 10044, Sweden.
John Ågren
Affiliation:
Department of Materials Science & Engineering, Royal Institute of Technology, Brinellvägen 23, Stockholm, 10044, Sweden.
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Abstract

In the current study an elasto-plastic phase field (PF) model, based on the PF microelasticity theory proposed by A.G. Khachaturyan, is used to investigate the effects of external stresses on the evolution of martensitic microstructure in a Fe-0.3%C polycrystalline alloy. The current model is improved to include the effects of grain boundaries in a polycrystalline material. The evolution of plastic deformation is governed by using a time dependent Ginzburg-Landau equation, solving for the minimization of the shear strain energy. PF simulations are performed in 2D and 3D to study the effects of tension, compression and shear on the martensitic transformation. It has been found that external stresses cause an increase in the volume fraction of the martensitic phase if they add to the net effect of the transformation strains, and cause a decrease otherwise. It has been concluded that the stress distribution and the evolution of martensitic microstructure can be predicted with the current model in a polycrystalline material under applied stresses.

Keywords

Phase Transformationsimulationgrain boundaries
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1535: Symposium a – Proceedings of the Multiscale Materials Modeling 2012 Conference , 2013 , mmm2012-a-0258
Copyright
Copyright © Materials Research Society 2013 

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References

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