The Effect of Shear Flow on Solidification Microstructures
Chao, Long-Sun
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/70157
Description
Title
The Effect of Shear Flow on Solidification Microstructures
Author(s)
Chao, Long-Sun
Issue Date
1988
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Engineering, Metallurgy
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.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
