Physicochemical and technological features of creating metal-based high-superalloys
E. N. Kablov and N. V. Petrushin
All-Russia Institute of Aviation Materials, 17 Radio
St., Moscow 107005, Russia
Abstract: The analysis of modern nickel-based superalloys evolution
for casting single-crystal turbine blades was performed. The influence
of rhenium as a new alloying element on the physicochemical, kinetic,
and structural parameters of nickel-based superalloys and phase stability
is discussed. The following experimental data are generalized: the coefficients
of segregation and distribution of alloying elements in nickel-based
superalloys gamma- and gamma'-phases, the influence of alloying elements
on the melting temperature, gamma- and gamma'-phases crystal lattice
parameters, diffusion rate of atoms and probability of topologically
close-packed (TCP) phase formation. The principles of the balanced alloying
and computerized design method for developing fourth-generation single-crystal
nickel-based superalloys with high Re content (9 �10 %) are considered.
The role of high gradient directional solidification (200 �220�C cm�1)
in producing single-crystal turbine blades of nickel-based superalloys
with high Re content is discussed.
*Plenary lecture presented at the XVII Mendeleev Congress on General and Applied Chemistry, Kazan, Tatarstan, Russia, 21 -26 September 2003. Other presentations are published in this issue, pp. 1605-1798.
Page last modified 23 September 2004.
Copyright © 2004 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web
manager.
