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A thermodynamic framework for coupled multiphase field and diffusion models for lower bainite transformation
Author(s) -
Düsing Martin,
Mahnken Rolf
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610149
Subject(s) - bainite , austenite , thermodynamics , materials science , ferrite (magnet) , carbide , supersaturation , work (physics) , diffusion , transformation (genetics) , carbon fibers , phase field models , metallurgy , phase (matter) , microstructure , chemistry , physics , composite material , biochemistry , organic chemistry , composite number , gene
The lower bainite transformation is characterized by a displacive transformation from austenite to bainitic ferrite and a subsequent separation of carbon within the new supersaturated phase. At accumulations of carbon carbides precipitate. To model this complex process a framework considering phase changes and carbon diffusion is required. In this work we present a thermodynamic framework based on the theory of microforce balances considering multiphase Ginzburg‐Landau equations coupled with Cahn‐Hilliard diffusion. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)