Development of NDT system with image reconstruction capabilities of flaws

Yoshihiro Nishimura; Sasamoto Akira; Takayuki Suzuki

doi:10.1117/12.847962

1 April 2010 Development of NDT system with image reconstruction capabilities of flaws

Yoshihiro Nishimura, Sasamoto Akira, Takayuki Suzuki

Proceedings Volume 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010; 76474K (2010) https://doi.org/10.1117/12.847962
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

EMAT, which is based on magnetostrictive effects, was employed to detect flaws in a sample with surface oxide scale. Chromium molybdenum steel (SCM415) was annealed at 600C to 900C from two to eight hours and subjected to EMAT to survey its signal properties. Oxide scales has ferromagnetism. The data from these samples were compared to an actually used samples. The EMAT signal derived from the actual sample was found to be too noisy due to Barkhausen effect to identify reflections from internal flaws and to reconstruct flaw images in a computer. This study proposes spectrum analysis and statistical methods based on noise probability to decrease this noise.

Citation Download Citation

Yoshihiro Nishimura, Sasamoto Akira, and Takayuki Suzuki "Development of NDT system with image reconstruction capabilities of flaws", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76474K (1 April 2010); https://doi.org/10.1117/12.847962

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