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Nondestructive Evaluation of Austenitic Stainless Steel Using CIC-MFL and LIHaS

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3 Author(s)
Jongwoo Jun ; Res. Center for Real Time NDT, Chosun Univ., Gwangju, South Korea ; Myungki Choi ; Jinyi Lee

Austenitic stainless steels (A-SS) are extensively used in widespread industrial and technological applications due to their good corrosion resistance combined with their relatively high strength, toughness, and stiffness. However, sometimes a small amount of partial magnetization is generated in A-SS due to imperfect final heat treatments and mechanical processing, such as rolling and welding. These partially magnetized regions may be misidentified as a crack when tested using conventional nondestructive methods. This paper presents a nondestructive evaluation approach using a linearly integrated Hall sensor array (LIHaS) and a combined induced current and magnetic flux leakage (CIC-MFL) method in order to ensure reliable crack inspections for A-SS.

Published in:

Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )