電磁気的手法を用いたエネルギー機器用構造材料の劣化損傷の評価
Evaluation of Defect and Damage for Structural Materials of Energy Device by Using Electromagnetic Techniques
著者:
鈴木 隆之 Takayuki SUZUKI 黒田 匠 Takumi KUROTA 笹本 明 Akira SASAMOTO 西村 良弘 Yoshihiro NISHIMURA 寺本 徳郎 Tokuo TERAMOTO
発刊日:
公開日:
DefectEnergy DeviceFluxgate ensorInverse AnalysisMagnetic Flux LeakageThermal AgingTikhonov Regularization
概要
Evaluation of defect and damage for structural materials of energy device was performed by using ectromagnetic techniques. For degradation of thermal aging magnetic characterization of weld specimens HCM12A was performed. Comparing the specimen aged at 550°C for 2000 hours with that aged at D0°C for 600 hours, it was found that the changes in magnetic flux densities was clearly observed near the eld metal and heat affected zone for the specimen aged at 550°C for 2000 hours. Then the degree of egradation for weld specimen could be evaluated by the changes of magnetic flux densities. For egradation of defect and crack changes in leakage magnetic flux densities around surface defect of SS400 ere measured by fluxgate sensor. And by using inverse analysis of Tikhonov regularization, magnetic marge distribution of defect was calculated from the measured leakage magnetic flux densities and the efect size was successfully reconstructed.