Title :
Development of SQUID-Based System for Nondestructive Evaluation
Author :
Nagendran, R. ; Janawadkar, M.P. ; Pattabiraman, M. ; Jayapandian, J. ; Baskaran, R. ; Vaidhyanathan, L.S. ; Hariharan, Y. ; Nagesha, A. ; Valsan, M. ; Rao, K.B.S. ; Raj, Bhiksha
Author_Institution :
Indira Gandhi Centre for Atomic Res., Kalpakkam
Abstract :
This article describes the development of a superconducting quantum interference device (SQUID)-based system for nondestructive evaluation. The setup incorporates an in-house developed thin-film-based Nb SQUID with readout flux locked loop electronics and consists of a liquid helium cryostat with adjustable stand-off distance, a precision XY- thetas scanner for studying both flat and cylindrical samples, and a data acquisition system. The system has been used for the detection of artificially engineered subsurface defects in aluminum plates and to track magnetic-to-nonmagnetic phase transformation in stainless steel [grade 316L(N)] weldment specimens subjected to low cycle fatigue deformation.
Keywords :
SQUIDs; aluminium; deformation; eddy current testing; fatigue; magnetic transitions; plates (structures); stainless steel; welds; 316L(N) stainless steel; Al; SQUID-Based System; aluminum plates; data acquisition system; eddy current testing; liquid helium cryostat; low cycle fatigue deformation; magnetic-nonmagnetic phase transformation; nondestructive evaluation; readout flux locked loop electronics; stainless steel weldment specimens; superconducting quantum interference device; Aluminum; Data acquisition; Helium; Interference; Magnetic flux; Niobium; Phase detection; SQUIDs; Superconducting devices; Superconducting magnets; Eddy current testing; fatigue; nondestructive evaluation; superconducting quantum interference device (SQUID); weldment;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.902112
