Journal
ACTA MATERIALIA
Volume 60, Issue 4, Pages 1538-1547Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.11.039
Keywords
Phase-field models; Martensitic phase transformation; Microstructure; Steels
Funding
- Vinnova, the Swedish Governmental Agency for Innovation Systems, Swedish Industry
- KTH Royal Institute of Technology
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In the present work a 3-D elastoplastic phase-field (PF) model is developed, based on the PF microelasticity theory proposed by A.G. Khachaturyan and by including plastic deformation as well as anisotropic elastic properties, for modeling the martensitic transformation (MT) by using the finite-element method. PF simulations in 3D are performed by considering different cases of MT occurring in an elastic material, with and without dilatation, and in an elastic perfectly plastic material with dilatation having isotropic as well as anisotropic elastic properties. As input data for the simulations the thermodynamic parameters corresponding to an Fe-0.3%C alloy as well as the physical parameters corresponding to steels acquired from experimental results are considered. The simulation results clearly show autocatalysis and morphological mirror image formation, which are some of the typical characteristics of a martensitic microstructure. The results indicate that elastic strain energy, anisotropic elastic properties, plasticity and the external clamping conditions affect MT as well as the microstructure. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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