Open AccessEstimating Al 1230 clad thicknesses over Al 2024 alloys using apparent eddy current conductivity measurements
Author(s) -
Zain A. Ansari,
Bassam A. AbuNabah,
Maen Alkhader,
Adnan Muhammed
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1777/1/012044
Subject(s) - materials science , eddy current , eddy current testing , coating , conductivity , range (aeronautics) , lift (data mining) , calibration , substrate (aquarium) , electromagnetic coil , eddy current sensor , composite material , electrical engineering , computer science , mathematics , engineering , chemistry , statistics , geology , oceanography , data mining
The recent developments in apparent eddy current conductivity (AECC) spectroscopy have made it a viable candidate for clad thickness estimation where both clad and substrate are nonmagnetic metals. It negates the previous requirement of establishing a probe characteristic curve with a consistent lift-off distance between the measured sample and the calibration blocks. This eliminates the adverse effects in measurement uncertainty that occurred earlier due to liftoff variations. This study presents a practical approach for clad thickness estimation using AECC spectroscopy targeting clad thicknesses relevant to the industry. The technique once validated both numerically and experimentally has shown to deliver a measurement uncertainty of 3% over the entire coating thickness range of interest at a ±25.4μm lift-off range. Furthermore, it also reduces the coil diameter requirement to as low as 3 mm without the need of any correction factors.