Electromagnetic nondestructive evaluation (VI) : [includes a selection of papers presented at the Seventh International Workshop on Electromagnetic Nondestructive Evaluation (ENDE), held in Kobe, Japan from May 17 through 19, 2001

Eddy current testing is a key technology among electromagnetic non-destructive testings at present and this situation was motivated by a stringent need to detect small cracks in tubing of a steam generator of nuclear power plants. In these five years the ECT technology has been enhanced very much, demonstrating that high performanced sensors for ECT are now ready to be applied to the annual inspection of steam generator tubing with use of arrayed micro sensors for ECT. In addition to the innovative technology, an inversion technique is being theoretically developed to make reconstruction of defects possible with use of data from the arrayed sensors. Rapid growth of interest in electromagnetic nondestructive evaluation have brought together experts from different parts of the world, as reflected in this work. The book is intended for engineers, researchers and practitioners working in the area of electromagnetism. Cover......Page 1 Title page......Page 2 Foreword......Page 6 List of Referees......Page 8 E'NDE – Kobe, Conference Organization......Page 9 E'NDE – Kobe, List of Participants......Page 11 Contents......Page 16 Inverse Problems......Page 20 Electromagnetic Interrogation Techniques for Damage Detection......Page 22 Shape Identification in Conductive Materials by Electrical Resistance Tomography......Page 32 A Numerical Method for Finding the Convex Hull of Inclusions Using the Enclosure......Page 40 A Direct Reconstruction of Magnetic Charge for Non-Destructive Testing......Page 48 Stability and Uniqueness in Determining a Current Source in Quasistatic Maxwell......Page 54 Direct Problems......Page 62 Adaptive Multigrid Techniques in Electromagnetic Field Computation......Page 64 Eddy-Current Evaluation of 3-D Defects in a Metal Plate: A First Analysis of a Contrast-Source Gradient Method......Page 71 Numerical Analysis of Ultrasonic Inspection Using Electromagnetic Acoustic Transducer......Page 79 Finite Element Model for Crack with Narrow Gap in ECT Problem......Page 87 Eddy Current Analysis by Integral Equation Method for ECT......Page 93 Eddy Current Testing......Page 100 Achievement of RFEC Effects in the Nuclear Fuel Rod Inspection by Using Shielded Encircling Coils......Page 102 Behavior of the Remote-Field on a Tube with Fan-Shaped Defect......Page 110 Inversion of ECT Signals from Flaws with Tip Variation in Steam Generator Tubes......Page 117 Development of Practical MFES System for Concrete Materials......Page 123 Evaluation of Crack Signals for a Superconductive Pulsed Eddy-Current Probe......Page 127 Time-Domain Finite Element Analysis of Remote Field ECT Excited by Pulse Current......Page 135 Materials Characterization......Page 144 NDE of Fatigue Damage in Austenitic Stainless Steel by Measuring and Inversion of Damage-Induced Magnetic Field......Page 146 Magnetic Nondestructive Evaluation of Ferromagnetic Steels due to Mechanical Loading......Page 154 Fatigue Evaluation of Magnetic Materials by Chaotic Attractor of Barkhausen Noise......Page 162 Measurements and Semi-Analytical Modeling of Incremental Permeability Using Eddy Current Coil in the Presence of Magnetic Hysteresis,......Page 169 Novel E'NDE Techniques......Page 178 Development of ECT Multi-Probe Detecting Axial and Circumferential Cracks Using Uniform Eddy Current Excitation Coils......Page 180 Evaluation of the New ECT Sensor Using JSAEM Round Robin Test Samples in Presence of Fasteners Interferences......Page 185 Non-destructive Testing by Using the Rotational Magnetic Flux Type Probe for SG Tubes......Page 193 Evaluation of Near-Surface Material Properties Using Planar Mesh Type Coils with Post-processing from Neural Network Model......Page 200 Nondestructive Detection of Inside Cracks and Delamination in Carbon-Fiber-Reinforced Plastics Using Superconducting Quantum Interference Device......Page 208 Change of Magnetic Properties due to Plastic Deformation in Ni[sub(50)]Cu[sub(50)] Alloy......Page 215 Optimization of Pipeline Inspection Tool Using Taguchi Method......Page 222 Profile Reconstruction of Conductive Cracks from Eddy Current Signals by means of a Neuro-Fuzzy System......Page 230 Inverse Analysis of Steam Generator Tube ECT Signals with Noise Sources Outside......Page 237 Crack Shape Identification of Steam Generator Tubes by Approximate Output Least Square Problems......Page 243 A Processing Method of Eddy-Current Testing Image Using Subband Technique without Phase Distortion......Page 249 An Approach for Identifying Current Distributions by Means of Magnetic Field Sensor with High Spatial Resolution......Page 256 Wavelet Basis Function Neural Network for Eddy Current Signal Characterization......Page 264 Magnetic Transition Due to Tensile Deformation in SUS 304 Stainless Steel......Page 272 The Potential of NDE by Magnetic Methods in SUS 304 Stainless Steel......Page 277 New Sensors......Page 286 Development of a Microwave Focusing Sensor for Nondestructive Evaluation of Materials......Page 288 Development of the Electromagnetic Micro Sensor and its Application to the Inspection of Cast Duplex Stainless Steel......Page 295 Signal Detection......Page 302 Generalized Vector Sampled Pattern Matching Method – Theory and Applications......Page 304 Crack Detection by a Small Loop Antenna......Page 312 X......Page 320 Z......Page 321 This work is a collection of papers on electromagnetic nondestructive evaluation. It discusses developments in the growing field of electromagnetic nondestructive evaluation methods. Topics include evaluation of degradation mechanism in magnetic materials