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Progress on characterization of complex surface-breaking and sub-surface discontinuities using eddy current nondestructive evaluation and model-based inversion

Authors: Erin K. Oneida (KBRwyle) , Eric B. Shell (KBRwyle) , John C. Aldrin (Computational Tools) , Harold A. Sabbagh (Victor Technologies LLC) , Elias Sabbagh (Victor Technologies LLC) , R. Kim Murphy (Victor Technologies LLC) , Alisha L. Hutson (University of Dayton) , Vikas Sinha (UES, Inc.) , Kristin Keller (UES, Inc.) , Siamack Mazdiyasni (Air Force Research Laboratory) , Matthew R. Cherry (Air Force Research Laboratory)

Abstract

For powder metallurgy nickel-based superalloys, non-metallic inclusions (NMIs) and non-metallic particles are frequently present. If an EC inspection can reliably classify NMI indications from crack indications, there would be great payoff for the USAF. In this work, progress is presented on demonstrating the capability of eddy current inspection with model-based inversion to characterize complex surface-breaking and sub-surface discontinuities. A series of inversion studies were performed to investigate the sensitivity of the technique to varying probe and scan conditions. A number of complex discontinues were also manufactured to further challenge the inversion process. Lastly, both parametric model and emerging voxel-based inversion schemes were considered in the evaluation.

Keywords:

How to Cite: Oneida, E. K. , Shell, E. B. , Aldrin, J. C. , Sabbagh, H. A. , Sabbagh, E. . , Murphy, R. , Hutson, A. L. , Sinha, V. . , Keller, K. . , Mazdiyasni, S. . & Cherry, M. R. (2019) “Progress on characterization of complex surface-breaking and sub-surface discontinuities using eddy current nondestructive evaluation and model-based inversion”, Review of Progress in Quantitative Nondestructive Evaluation.(0).