Effects of external stresses on the martensitic transformation in a 3D polycrystalline material using the phase field method
2013 (English)In: Materials Research Society Symposium Proceedings: Proceedings of the Multiscale Materials Modeling 2012 Conference, Materials Research Society , 2013, 62-68 p.Conference paper (Refereed)Text
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.
Place, publisher, year, edition, pages
Materials Research Society , 2013. 62-68 p.
Materials Research Society Symposium Proceedings, ISSN 0272-9172 ; 1535
Elasticity, Grain boundaries, Martensitic transformations, Microstructure, Polycrystalline materials, Stress concentration, Three dimensional, Compression and shear, Martensitic microstructure, Martensitic phase, Phase field methods, Phase-field models, Polycrystalline alloys, Time dependent Ginzburg-Landau equations, Transformation strain, Shear flow
Engineering and Technology
IdentifiersURN: urn:nbn:se:sh:diva-30159DOI: 10.1557/opl.2013.459ScopusID: 2-s2.0-84900341160ISBN: 978-163266125-8 OAI: oai:DiVA.org:sh-30159DiVA: diva2:932480
21st International Materials Research Congress, IMRC 2012; Cancun; Mexico; 12 August 2012 through 17 August 2012