Stresses Developed within Thermally Grown Oxides on a Coated Superalloy Substrate

Gabrielle Hilson; Peter E.J. Flewitt

doi:10.4028/www.scientific.net/KEM.417-418.5

Paper Titles

Preface

Committees

Cyclic Damage Evolution in Polymer Matrix Composites
p.1

Stresses Developed within Thermally Grown Oxides on a Coated Superalloy Substrate
p.5

Analysis of the Three-Dimensional Delamination Behavior of Stretchable Electronics Applications
p.9

Modelling the Effect of Microstructural Randomness on the Fracture of Composite Laminates with Stochastic Cohesive Zone Elements
p.13

Numerical Simulation of Automotive Crash-Box Subjected to Low Velocity Frontal Impact
p.17

Molecular Dynamics Simulation on Crack Propagation for Magnesium
p.21

On the Use of the Theory of Critical Distances to Estimate K_Ic and ∆K_th from Experimental Results Generated by Testing Standard Notches
p.25

HomeKey Engineering MaterialsKey Engineering Materials Vols. 417-418Stresses Developed within Thermally Grown Oxides...

Stresses Developed within Thermally Grown Oxides on a Coated Superalloy Substrate

Abstract:

Residual macro-stresses have to be evaluated using trial samples that comprise a CMSX4 superalloy coated with either a RT22 or a CN91 bond-coat. The samples were exposed in air to a matrix of temperatures, in the range 850°C to 1050°C, and times extending upto 4000hrs to produce thermally grown oxide. This oxide is essentially Al2O3 which allows stresses to be measured by photoluminescence spectroscopy. In addition, Raman spectroscopy and X-ray diffraction have been used to characterise the oxides formed. The results are discussed with respect to confidence in the measurements, changes in stress with temperature and exposure time and the potential for photoluminescence spectroscopy to be used to measure stresses for service components.

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Periodical:

Key Engineering Materials (Volumes 417-418)

Pages:

5-8

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.417-418.5

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Online since:

October 2009

Authors:

Gabrielle Hilson, Peter E.J. Flewitt

Keywords:

Photoluminescence Spectroscopy, Raman Spectroscopy, Residual Stress, Superalloy, Thermally Grown Oxide, Turbine Blade

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