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A phase-field model for the formation of martensite and bainite

Arif, Tansel T. and Qin, Rong Shan (2014). A phase-field model for the formation of martensite and bainite. Advanced Materials Research, 922 pp. 31–36.

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The phase field method is rapidly becoming the method of choice for simulating the evolution of solid state phase transformations in materials science. Within this area there are transformations primarily concerned with diffusion and those that have a displacive nature. There has been extensive work focussed upon applying the phase field method to diffusive transformations leaving much desired for models that can incorporate displacive transformations. Using the current model, the formation of martensite, which is formed via a displacive transformation, is simulated. The existence of a transformation matrix in the free energy expression along with cubic symmetry operations enables the reproduction of the 24 grain variants of martensite. Furthermore, upon consideration of the chemical free energy term, the model is able to utilise both the displacive and diffusive aspects of bainite formation, reproducing the autocatalytic nucleation process for multiple sheaves using a single phase field variable. Transformation matrices are available for many steels, one of which is used within the model.

Item Type: Journal Item
Copyright Holders: 2014 Trans Tech Publications
ISSN: 1662-8985
Extra Information: THERMEC 2013 Supplement
Keywords: bainite; displacive; martensite; phase field
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41781
Depositing User: Rongshan Qin
Date Deposited: 15 Jan 2015 10:56
Last Modified: 07 Dec 2018 10:28
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