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|Title:||The Effect of Shear Flow on Solidification Microstructures|
|Department / Program:||Mechanical Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
Engineering, Materials Science
|Abstract:||Calculations are performed to determine the effect of fluid flow near a solidifying interface on the temperature and concentration fields existing during solidification, and the changes wrought on the microstructure by those fields. The solidification interface position and speed are controlled by two boundary conditions, corresponding to local thermodynamic equilibrium and conservation of mass. A three dimensional model of the solidifying interface is constructed, and the velocity, temperature and concentration fields are calculated for a wide range of alloy compositions and process conditions.
It is demonstrated that solute redistribution, caused by the fluid flow near interface, can be counteracted by changes in the morphology of the solidification interface. The cellular interface is shown to translate into the flow as it advances in the direction of the heat flux vector, the net effect being an inclination of the cells into the flow direction. Microstructures are predicted for several compositions and processing conditions in the Sn-Pb system.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988.
|Date Available in IDEALS:||2014-12-15|
This item appears in the following Collection(s)
Dissertations and Theses - Mechanical Science and Engineering
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois