Title of article :
Corrosion kinetics of a directionally solidified Ni-base superalloy Original Research Article
Author/Authors :
Ali P. Gordon، نويسنده , , Matthew D. Trexler، نويسنده , , Richard W. Neu، نويسنده , , Thomas J. Sanders Jr، نويسنده , , David L. McDowell، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2007
Pages :
11
From page :
3375
To page :
3385
Abstract :
A variety of experiments were carried out to characterize the corrosion kinetics of a longitudinally oriented directionally solidified Ni-base superalloy, DS GTD-111, commonly applied as a first- and second-stage blading material in electric power generation gas-powered turbines. Under operating environments, the airfoil sections of turbine blades sustain surface-initiated damage due to the superimposed centrifugal stresses, elevated temperature and presence of corrosive reactants in the environment. As a consequence, surface cracking curtails the service lives of such components. To thoroughly characterize the stress-free and stress-assisted kinetics of diffusion and cyclic oxide rupture, several types of experiments are conducted: low cycle fatigue, thermomechanical fatigue, and thermogravimetric analysis, among others. A key goal of this study is to provide data necessary for the development of diffusion kinetics models. Accordingly, the study is divided into two parts: stress-free diffusion and stress-assisted rupture. Models are developed for each of these conditions.
Keywords :
Ni-base superalloys , Low cycle fatigue , Syngas , Directionally solidified , Oxidation
Journal title :
ACTA Materialia
Serial Year :
2007
Journal title :
ACTA Materialia
Record number :
1143033
Link To Document :
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