A method for measuring non-linear elastic properties of thermal barrier coatings

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Description

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 ... continued below

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6 p.

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Johnson, C.A.; Ruud, J.A.; Kaya, A.C. & deLorenzi, H.G. June 1, 1995.

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Description

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.

Physical Description

6 p.

Notes

OSTI as DE95012913

Source

  • 1995 National thermal spray conference, Houston, TX (United States), 11-15 Sep 1995

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  • Other: DE95012913
  • Report No.: DOE/MC/30244--95/C0481
  • Report No.: CONF-9509182--1
  • Grant Number: AC21-93MC30244
  • Office of Scientific & Technical Information Report Number: 90407
  • Archival Resource Key: ark:/67531/metadc794845

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 1995

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 1, 2016, 5:26 p.m.

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Johnson, C.A.; Ruud, J.A.; Kaya, A.C. & deLorenzi, H.G. A method for measuring non-linear elastic properties of thermal barrier coatings, article, June 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc794845/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.