3D Phase Field Modeling of Martensitic Microstructure Evolution in Steels

Hemantha Kumar Yeddu; John Ågren; Annika Borgenstam

doi:10.4028/www.scientific.net/SSP.172-174.1066

Paper Titles

Magic Numbers for Bimetallic Clusters
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Modeling of β→α Transformation in Complex Titanium Alloys
p.1044

Phase Field Modelling of Austenite Formation in Low Carbon Steels
p.1050

Investigation of Spinodal Decomposition in Fe-Cr Alloys: CALPHAD Modeling and Phase Field Simulation
p.1060

3D Phase Field Modeling of Martensitic Microstructure Evolution in Steels
p.1066

Phase-Field Modelling of Spinodal Decomposition during Ageing and Heating
p.1072

Spin Models for Ferroelastics: towards a Spin Glass Description of Strain Glass
p.1078

Phase-field Model for Diffusional Phase Transformations in Elastically Inhomogeneous Polycrystals
p.1084

Helical Domain Patterns in Tube Configurations: Effect of Geometry Length Scales
p.1090

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3D Phase Field Modeling of Martensitic Microstructure Evolution in Steels

Abstract:

Complex martensitic microstructure evolution in steels generates enormous curiosity among the materials scientists and especially among the Phase Field (PF) modeling enthusiasts. In the present work PF Microelasticity theory proposed by A.G. Khachaturyan coupled with plasticity is applied for modeling the Martensitic Transformation (MT) by using Finite Element Method (FEM). PF simulations in 3D are performed by considering different cases of MT occurring in a clamped system, i.e. simulation domain with fixed boundaries, of (a) pure elastic material with dilatation (b) pure elastic material without dilatation (c) elastic perfectly plastic material with dilatation having (i) isotropic as well as (ii) anisotropic elastic properties. As input data for the simulations the thermodynamic parameters corresponding to Fe - 0.3% C alloy as well as the physical parameters corresponding to steels acquired from experimental results are considered. The results indicate that elastic strain energy, dilatation and plasticity affect MT whereas anisotropy affects the microstructure.