Skip to main content

Research Repository

Advanced Search

Residual stresses in environmental and thermal barrier coatings on curved superalloy substrates: experimental measurements and modelling

Liu, D.; Kyaw, S.T.; Flewitt, P.E.J.; Seraffon, M.; Simms, N.J.; Pavier, M.; Jones, I.A.

Authors

D. Liu

SI KYAW Si.Kyaw@nottingham.ac.uk
Senior Mechanical Engineer - Turbines

P.E.J. Flewitt

M. Seraffon

N.J. Simms

M. Pavier

I.A. Jones arthur.jones@nottingham.ac.uk



Abstract

Residual stresses within thermal barrier coated (TBC) systems are predicted using finite element models and are compared against experimental measurements taken using Raman and photo-stimulated luminescence piezo-spectroscopic methods. Two types of specimens were considered: flat specimens without TBC, and aerofoil shaped specimens with TBC. Comparisons between model predictions and experimentally measured stresses and also the relationship between substrate curvature and residual stresses on subsequent spallation of the aerofoil specimen were made. For the flat specimen, predicted and measured residual stresses are of the same order of magnitude. Both studies have indicated that larger compressive residual stresses arise from higher substrate curvatures. The results improve the understanding of initiation and propagation of TBC cracks which occurs preferentially at locations with high substrate convex curvature.

Citation

Liu, D., Kyaw, S., Flewitt, P., Seraffon, M., Simms, N., Pavier, M., & Jones, I. (2014). Residual stresses in environmental and thermal barrier coatings on curved superalloy substrates: experimental measurements and modelling. Materials Science and Engineering: A, 606, https://doi.org/10.1016/j.msea.2014.03.014

Journal Article Type Article
Acceptance Date Mar 3, 2014
Online Publication Date Mar 12, 2014
Publication Date Jun 12, 2014
Deposit Date Aug 15, 2016
Publicly Available Date Aug 15, 2016
Journal Materials Science and Engineering: A
Print ISSN 0921-5093
Electronic ISSN 0921-5093
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 606
DOI https://doi.org/10.1016/j.msea.2014.03.014
Public URL http://eprints.nottingham.ac.uk/id/eprint/35845
Publisher URL http://www.sciencedirect.com/science/article/pii/S0921509314002731
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

Files

Liu_Kyaw_revised after reviewer comments.pdf (1.2 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





You might also like



Downloadable Citations