CUED Publications database

A model for diffusive and displacive phase transitions: Thermo-chemo-mechanical coupling effects

Maraldi, M and Wells, GN and Molari, L and Molari, PG (2010) A model for diffusive and displacive phase transitions: Thermo-chemo-mechanical coupling effects. AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications. pp. 65-69. ISSN 1924-3642

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Abstract

A diffuse interface phase field model is proposed for the unified analysis of diffusive and displacive phase transitions under nonisothermal conditions. Two order parameters are used for the description of the phenomena: one is related to the solute mass fraction and the other to the strain. The model governing equations come from the balance of linear momentum, the solute mass balance (which will lead to the Cahn-Hilliard equation) and the balance of internal energy. Thermodynamic restrictions allow to define constitutive relations for the thermodynamic forces and for the mechanical and chemical dissipations. Numerical tests carried out at different values of the initial temperature show that the model is able to describe the main features of both the displacive and the diffusive phase transitions, as well as their effect on the temperature. © 2010, Advanced Engineering Solutions.

Item Type: Article
Uncontrolled Keywords: Diffusive Displacive Dissipations Heat equation Phase transition Phase-field model
Subjects: UNSPECIFIED
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:19
Last Modified: 08 Dec 2014 02:35
DOI: