A Load-based Depth-sensing Indentation Technique for NDE and Life Assessment of Thermal Barrier Coatings
In this paper, we present a load-based micro-indentation technique for evaluating material mechanical properties as well as degradation evaluation and debonding/spallation detection of thermal barrier coating (TBC) materials. Instead of using contact area as a necessary parameter, the new technique is based on the indentation load. Coupled with a multiple-partial unloading procedure during the indentation process, this technique results in a load-depth sensing indentation system capable of determining Young’s modulus of metals, superalloys, and single crystal matrices, and stiffness of coated material systems with flat, tubular, or curved architectures. This micro-indentation technique can be viewed as a viable non-destructive evaluation (NDE) technique for determining as-manufactured and process-exposed metal, superalloy, single crystal, and TBC-coated material properties. This technique also shows promise for the development of a portable instrument for on-line, in-situ NDE and mechanical properties measurement of structural components.
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy (FE)
- DOE Contract Number:
- XX0000000
- OSTI ID:
- 1015338
- Report Number(s):
- NETL-TPR-2279; TRN: US201111%%553
- Resource Relation:
- Conference: ASME Turbo Expo 2009: Power for Lang, Sea and Air; Orlando, Florida, USA, June 8-12, 2009
- Country of Publication:
- United States
- Language:
- English
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