TY - JOUR
T1 - Imaging of Near-Surface Defects using Microwaves and Ultrasonic Phased Array Techniques
AU - Yassin, Abdallah
AU - Rahman, Mohammed Saif Ur
AU - Abou-Khousa, M. A.
N1 - Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Detecting and imaging near-surface defects is of significant importance in many applications. Detecting corrosion/defects under thin paint layer applied on metallic substrates, evaluating debond under a Teflon coat, as well as evaluating the integrity of the dielectric coats remains a challenge in many industries settings. Periodic testing is imperative for a wide range of industries to isolate material defects that could lead to catastrophic failures, expensive repairs, or a complete shutdown. Out of the many non-destructive testing (NDT) techniques available, phased array ultrasonic testing (PAUT) is widely used in various industries for material inspection. It has shown exceptional capability in detection of defects, including material loss and corrosion in metals. On the other hand, near-field microwave NDT is emerging as a powerful inspection modality for similar applications. In this paper, imaging capabilities of PAUT (5 MHz) as well as near-field microwave imaging system (33.5 GHz) are discussed and evaluated for a number of specimens with man-made surface defects. The evaluated defects include flat bottom slots, holes and corrosion-under-paint. Images produced by both techniques are presented. The images produced by the microwave imaging system are benchmarked with PAUT system.
AB - Detecting and imaging near-surface defects is of significant importance in many applications. Detecting corrosion/defects under thin paint layer applied on metallic substrates, evaluating debond under a Teflon coat, as well as evaluating the integrity of the dielectric coats remains a challenge in many industries settings. Periodic testing is imperative for a wide range of industries to isolate material defects that could lead to catastrophic failures, expensive repairs, or a complete shutdown. Out of the many non-destructive testing (NDT) techniques available, phased array ultrasonic testing (PAUT) is widely used in various industries for material inspection. It has shown exceptional capability in detection of defects, including material loss and corrosion in metals. On the other hand, near-field microwave NDT is emerging as a powerful inspection modality for similar applications. In this paper, imaging capabilities of PAUT (5 MHz) as well as near-field microwave imaging system (33.5 GHz) are discussed and evaluated for a number of specimens with man-made surface defects. The evaluated defects include flat bottom slots, holes and corrosion-under-paint. Images produced by both techniques are presented. The images produced by the microwave imaging system are benchmarked with PAUT system.
KW - Microwaves
KW - Non-destructive testing
KW - Phased array ultrasonic testing
KW - Surface defects
UR - http://www.scopus.com/inward/record.url?scp=85053472592&partnerID=8YFLogxK
U2 - 10.1007/s10921-018-0526-9
DO - 10.1007/s10921-018-0526-9
M3 - Article
AN - SCOPUS:85053472592
SN - 0195-9298
VL - 37
JO - Journal of Nondestructive Evaluation
JF - Journal of Nondestructive Evaluation
IS - 4
M1 - 71
ER -