Evaluation of Fatigue Cracks by Angle Beam EMAT and EC Dual Probe
The authors have proposed a novel probe combining EMAT (Electromagnetic Acoustic Transducer) and EC (Eddy Current)Probe as a multi-probe with simple structure and showed that the probe combines the advantages carried by ultrasonic testing (UT) and eddy current testing (ECT). In this paper, the above multi-probe is improved in order to evaluate fatigue cracks in austenitic stainless steel specimens. The probe consists of a permanent magnet and meander coil to generate shear-vertical wave propagating obliquely in the specimens. The structure of the magnet and coils were designed, considering crack sizing capability of both EMAT and ECT modes. The experimental results showed that the present probe in the EMAT and EC mode has a capability of shallow and deep cracks on the backside, respectively, which indicates that the present probe provides accurate evaluations of fatigue cracks with various depth.
Muhi-probe Fatigue cracks Eddy current testing Ultrasonic testing Electromagnetic acoustic transducer
Tetsuya Uchimoto Toshiyuki Takagi Toshiaki Ichihara Fumihiro Takahasi
Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan School of Engineering, Tohoku University, Sendai 980-8577, Japan
国际会议
ISSNP2008、CSEPC、ISOFIC2008(第二届21世纪和谐核电系统国际会议、第四届电厂控制中认知系统工程方法国际会议暨第三届未来核电厂仪表与控制国际会议)
哈尔滨
英文
133-137
2008-09-08（万方平台首次上网日期，不代表论文的发表时间）