| Abstract: | Numerical simulations using a mathematical model of the dendritic solidification of multicomponent alloys that includes thermosolutal
convection and macrosegregation were conducted on nickel-based alloys. The results show that segregation patterns vary greatly
with cooling conditions, adopting several shapes and levels of intensity. In addition, the segregation patterns are particularly
sensitive to the values of the equilibrium partition coefficients of the alloy components.
S.D. Felicelli earned his Ph.D. in mechanical engineering from the University of Arizona in 1991. He is currently a research scientist at
Centro Atomico Bariloche, Argentine Atomic Energy Commission.
D.R. Poirier earned his Sc.D. in metallurgy from the Massachusetts Institute of Technology in 1966. He is currently professor of materials
science and engineering at the University of Arizona. Dr. Poirier is a member of TMS.
A.F. Giamei earned his Ph.D. from Northwestern University in 1967. He is currently principal scientist in the Materials and Structures
Technology Department of the United Technologies Research Center. Dr. Giamei is also a member of TMS.
J.C. Heinrich earned his Ph.D. in mathematics fromthe University of Pittsburgh in 1975. He is currently professor of aerospace and mechanical
engineering at the University of Arizona. |
