A method for measuring non-linear elastic properties of thermal barrier coatings
Accurate characterization of the elastic properties of thermal barrier coatings (TBC`s) is important for failure prediction. Thermally sprayed coatings often exhibit anisotropic and nonlinear elastic properties due to the coating microstructure that results from the thermal spray process. A method was developed for determining the elastic behavior of TBC`s on substrates by measuring the in-plane modulus as a function of residual coating stress. The in-plane modulus was determined by resonant frequency measurement, and the residual stress was measured from the substrate curvature. The residual stress was varied both by increasing the temperature of the TBC and substrate and by applying compressive plastic strain to the metal substrate. The stress-strain behavior of the TBC was derived from the data for modulus versus residual stress, and significant nonlinear elastic behavior was observed.
- Research Organization:
- General Electric Co., Schenectady, NY (United States). Corporate Research and Development Center
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-93MC30244
- OSTI ID:
- 90407
- Report Number(s):
- DOE/MC/30244-95/C0481; CONF-9509182-1; ON: DE95012913
- Resource Relation:
- Conference: 1995 National thermal spray conference, Houston, TX (United States), 11-15 Sep 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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