State Key Laboratory for Powder Metallurgy, Central South University, Changsha, 410083
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DOI:
10.7502/j.issn.1674-3962.2015.04.07
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Abstract:
Thermodynamic properties and phase equilibria are prerequisite for understanding many scientific and technological disciplines. Accurate databases for thermodynamic and thermophysical properties are the key to realize the description of microstructure evolution of multicomponent and multiphase alloys. As super-structural materials for aerospace and civil industry, the optimal process for the aluminum alloys is very important and has received a lot of concerns. This paper firstly provides an overview on the thermodynamic database and the latest research progress on the multicomponent aluminum alloys, especially introducing the application of TEM and 3DAP in the measurement of phase equilibria of the multicomponent alloys as well as the importance of first-principles calculations in the construction of the thermodynamic database. Subsequently, a brief introduction about the recent research on the thermophysical databases of the aluminum alloys, such as diffusion coefficient, molar volume as well as the viscosity, is presented. Then three case studies are described to show how the thermodynamic and thermophysical databases are applied in the simulation of the solidification microstructure of the aluminum alloys. Finally, the major challenges for the development of accurate thermodynamic and thermophysical databases for multicomponent and multiphase aluminum alloys are briefly concluded.