Phase field modeling of martensitic transformation- Effect of grain and twin boundaries
(English)Manuscript (preprint) (Other academic)
In this work we are presenting, for the first time, the elasto-plastic phase field modeling and simulation of the martensitic transformation in a polycrystalline material including the effect of grain and twin boundaries. The phase field microelasticity theory proposed by Khachaturyan is used to perform 2D and 3D simulations of FCC$\rightarrow$BCT martensitic transformation in an Fe-0.3\%C polycrystalline alloy, incorporating the effect of both coherent and incoherent boundaries. The effect of plastic accommodation is also introduced into the model, by solving a time dependent equation, during the solid-to-solid phase transformation. It is found that the given phase field model, with the effect of grain boundaries, not only respects the morphological features of martensite but it also conforms well with the physics of the problem. Different sets of simulations are performed to validate the model and it is concluded that the given model can correctly predict the evolution of martensitic microstructure in a polycrystal as opposed to the previous models where the effects of grain and twin boundaries are neglected.
Martensitic transformation; Polycrystal; Grain boundaries; Phase field modeling; Simulations.
IdentifiersURN: urn:nbn:se:kth:diva-118448OAI: oai:DiVA.org:kth-118448DiVA: diva2:606216
QS 20132013-02-182013-02-182013-02-19Bibliographically approved