Conformable Eddy-Current Sensors and Arrays for Fleetwide Gas Turbine Component Quality Assessment
Author:
Goldfine N.1, Schlicker D.1, Sheiretov Y.1, Washabaugh A.1, Zilberstein V.1, Lovett T.1
Affiliation:
1. JENTEK Sensors, Inc., 110-1 Clematis Avenue, Waltham, MA 02453-7013
Abstract
The conformable Meandering Winding Magnetometer (MWM®) eddy current sensors and MWM-arrays provide new inspection capabilities for gas turbine components. The sensors provide measurements of coating thickness and absolute electrical conductivity, which can capture features of interest for a population of components, e.g., for tracking fleetwide trends in quality and aging, failure evaluations, and correlating failure origins to features of specific fleet population segments. Inspection applications include metallic and nonmetallic coating thickness and porosity measurement, detection of cracks on complex surfaces, imaging and detection of small flaws, thermal degradation monitoring, and cold work quality assessment. For example, the U.S. Air Force uses the MWM for cold work quality control on all of the C-130 propeller blades that go through the Warner Robins ALC. For P-3 and C-130 propeller blades, trend analysis is being performed fleetwide. This paper describes MWM technology advances for absolute property measurements and specific capability demonstrations. Multifrequency quantitative inversion methods used for coating characterization are also used for characterization of process-affected zones, such as shot peen quality or titanium alpha case characterization.
Publisher
ASME International
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference10 articles.
1. Auld, B. A., and Moulder, J. C., 1999. “Review of Advances in Quantitative Eddy Current Nondestructive Evaluation,” J. Nondestruct. Eval., 18(1). 2. Goldfine, N. J.
, 1993, “Magnetometers for Improved Materials Characterization in Aerospace Applications,” Mater. Eval., Mar., pp. 396–404. 3. Goldfine, N. J., Lovett, J. T., and Sheiretov, Y., 1995, “Dielectrometers and Magnetometers, Suitable for in-situ Inspection of Ceramic and Metallic Coated Components,” SPIE Conference on Nondestructive Evaluation of Aging Infrastructure. 4. Miller, R. A., 2000, private communication. 5. Goldfine, N. J., Zombo, P. J., and Miller, R. A., 1999, gas turbine materials.
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