Reliability Assessment of Nondestructive Evaluation via Eddy-Current Model-Based Inversion

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-09-C-5232
Agency Tracking Number: F081-033-0290
Amount: $749,729.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: AF081-033
Solicitation Number: 2008.1
Small Business Information
Victor Technologies, LLC
P.O. Box 7706, Bloomington, IN, 47407
DUNS: 074529467
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 HAROLD SABBAGH
 President
 (812) 339-8273
 has@sabbagh.com
Business Contact
 Harold Sabbagh
Title: President
Phone: (812) 339-8273
Email: has@sabbagh.com
Research Institution
N/A
Abstract
The reliability of nondestructive evaluation (NDE) techniques is currently determined through probability-of-detection (POD) studies that rely on measurements of actual hardware copies of representative flaws.  There is now a need to eliminate the inefficiencies and expenses of this method by using model-based standards derived from sophisticated engineering computer codes that are, in turn, derived from rigorous applications of physical theories.  This proposal applies the concepts of model-based and voxel-based inversion that is based upon Victor Technologies'''' well-known eddy-current code, VIC-3D(c), to solve the problem of reliably assessing NDE techniques.  We will introduce the notion of `Probability of Inversion,'''' and show that the classical model-assisted POD (MAPOD) becomes a simple corollary to it.  Furthermore, we will develop a rigorous electromagnetic model for anisotropic media, such as Ti-6Al-4V, which is a titanium alloy that is widely used in aerospace structures and engines.  With these concepts we effectively enter the `digital age'''' of eddy-current NDE, leaving traditional emphasis on analog instruments behind. BENEFITS: The technology that we develop in this proposal will be applicable to the aerospace, nuclear power, materials characterization and many other industries, so our research will have commercial benefits that extend far beyond military applications.

* information listed above is at the time of submission.

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