Thesis-2004-DiMartino.pdf (58.09 MB)
Download fileMicrostructure modelling of coated single-crystal Ni-based superalloys
thesis
posted on 2018-10-26, 15:50 authored by Irene Di MartinoMarket-driven requirements for better performance of gas-turbine engines are the main drive
towards the development of more advanced Ni-based superalloy/coating systems. The
durability of such coated components is a crucial issue faced by the power generation and the
aircraft industries, because coating life mainly controls the refurbishment and replacement of
many engine parts, such as blades. Coated systems undergo a number of microstructural
changes as a result of thermal exposure, which need to be understood for the creation of
accurate microstructure-based life-prediction models.
This work was mainly concerned with the evolution of the microstructure in both the parent
material and the coating as a function of temperature and time in a number of single-crystal
Ni-based superalloys, coated with an MCrAlY coating. The microstructural changes occurring
at various time/temperature conditions were studied using thermodynamic equilibrium
calculations, scanning electron microscopy and energy dispersive X-ray analysis. [Continues.]
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials