An optimization technique for the evaluation of eddy current inspection data to determine weld quality

This paper describes the design, engineering, assembly, testing and implementation of an eddy current inspection system to determine weld quality for a laser welding process. This system performs an in situ circumferential weld depth measurement of nuclear weapons primary components during fabrication. The goal of the inspection is to provide an accurate and repeatable estimate of the weld quality while minimizing contact with the part. Eddy current testing is a non-destructive testing (NDT) method used for interrogating conductive materials for defects and metallurgical characteristics. The technique is commonly used in the construction, aerospace, automotive, chemical processing, and power industries to examine structural components for cracks and voids and to study material properties such as hardness, embrittlement, permeability, and conductivity. This paper presents an analysis technique for the evaluation of eddy current data for the determination of weld quality.