Location

Williamsburg, VA

Start Date

1-1-1986 12:00 AM

Description

Eddy current methods have the potential to detect and characterize (size) cracks or flaws located on and/or near the surface of a testpiece. In spite of the facts that Eddy-Current inspection has been in widespread use for more than 30 years and that a number of different EC instruments are commerically available, there still is a need to improve eddy-current probes. Particular probe characteristics requiring improvement are: sensitivity, resolution, reproducibility. In addition, improved analytical understanding is needed to optimize probe design and to identify the key parameters required for setting realistic specifications. Even in light of the recent development in the automatic defect characterization associated with Eddy Current and leakage flux methods, the subject of electromagnetic methods of nondestructive testing is characterized largely by empirical knowledge. Analytical technique developed to date are limited and unfortunately do not allow consideration of realistic flaw geometry nor non-linear material properties.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

5A

Chapter

Chapter 1: Conventional Methodologies

Section

Eddy Currents

Pages

165-176

DOI

10.1007/978-1-4615-7763-8_18

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Uniform Interrogating Field Eddy Current Technique and its Application

Williamsburg, VA

Eddy current methods have the potential to detect and characterize (size) cracks or flaws located on and/or near the surface of a testpiece. In spite of the facts that Eddy-Current inspection has been in widespread use for more than 30 years and that a number of different EC instruments are commerically available, there still is a need to improve eddy-current probes. Particular probe characteristics requiring improvement are: sensitivity, resolution, reproducibility. In addition, improved analytical understanding is needed to optimize probe design and to identify the key parameters required for setting realistic specifications. Even in light of the recent development in the automatic defect characterization associated with Eddy Current and leakage flux methods, the subject of electromagnetic methods of nondestructive testing is characterized largely by empirical knowledge. Analytical technique developed to date are limited and unfortunately do not allow consideration of realistic flaw geometry nor non-linear material properties.