突合せ配管内壁からのレーザ溶接部分に対する EMAT 探傷の試み
EMAT-Guided Wave Approach for Detecting and Quality Evaluation of the Laser Beam Butt Welding Line on the Inner Surface of the Steel Pipe
著者:
古澤 彰憲 Akinori FURUSAWA 西村 昭彦 Akihiko NISHIMURA 鳥本 和弘 Kazuhiro TORIMOTO 竹仲 佑介 Yusuke TAKENAKA 西條 慎吾 Shingo SAIJO 外山 亮治 Ryoji TOYAMA
発刊日:
公開日:
概要
The aim of this work presented here is to investigate the applicability of the guided wave testing to detect and evaluate the quality of laser beam butt welding line. First, four test pipes were prepared. All of the pipes were laser beam butt welded from inside of the pipe using laser torch. Two pipes of them were high-quality welded, the others were low-quality. Two different pipe-wall-thicknesses were in each quality. Secondly, Laser beam butt welding line detection and the quality evaluation experiments were performed. T(0,1) mode guided wave was excited and received by electromagnetic acoustic transducer array. Finally, the experimental results were analyzed and issues concerning with the applicability of the guided wave testing to detection and quality evaluation of the laser butt welding line were discussed. Keywords: Ultrasonic, Non-destructive Testing, Structural Health Monitoring, Torsional mode.
