Eddy-current method is applied to evaluate electromagnetic properties of modified 9Cr-1 Mo steel used in power plants in order to investigate the material changes in heat affected zone (HAZ) and base metal in Type IV damage evaluation. A pancake-coil impedance model based on eddy current theory is proposed to evaluate conductivity and permeability of conducting mat erial. Further more a series of HAZ and base specimens of Modified 9Cr-1 Mo steel in different heat treatment conditions are experimentally mea...
英字タイトル:
Electromagnetic Property Evaluation on HAZ and Base Metal of Modified 9Cr-1Mo steel by Eddy Current Method

We have developed the constant incident angle method to inspect pipes by using high power square burst wave in non contact air upled ultrasonic testing (NAUT). We also succeeded to scan the effective guided wave propagat ed circumferentially in pipes. This per describes the optimum frequency, incident angle, the selection of prob es and examples of detecting image pictures with the onstant incident angle focusing method using focus probe....
英字タイトル:
evelopment of Inspection Method for Pipes by Non Contact Air Coupled Ultrasonic Testing