Indira Gandhi Center for Atomic Research Metallurgy and Materials Group
Kalpakkam - 603 102
Indira Gandhi Center for Atomic Research
Metallurgy and Materials Group
Kalpakkam - 603 102
Electromagnetics, Modelling, Sensors and Imaging (EMSI) Section
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OBJECTIVES
¨ Development of electromagnetic NDE techniques for detection and characterization of defects and microstructural variations in metallic materials.
¨ Development of electromagnetic instruments and sensors (eddy current, remote field eddy current, Hall, GMR, GMI, MBE and others) for NDE applications.
¨ Numerical modeling of eddy current (EC) and magnetic flux leakage (MFL) techniques.
¨ Development of digital signal processing and image processing methods.
¨ Development of eddy current, micro-magnetic and non-linear ultrasonics based methodologies for material characterization.
¨ Development of ACPD and ACFM techniques for sizing defects
¨ X-ray diffraction for material characterization and residual stress measurement.
¨ Realization of field implementable electromagnetic NDE technologies.
STAFF MEMBERS
Enquiries can be sent to Dr. B.P.C. Rao, Head, EMSI Section, NDE Division, IGCAR
FACILITIES
¨ Eddy current instruments (single & multi-frequency, phased array, remote field and pulsed)
¨ Micro-magnetic NDE facility
¨ Magnetic flux leakage test facility
¨ COMSOL finite element multiphysics modeling software
¨ MAC Science X-ray diffractometer
¨ Rigaku Strain flex residual stress measurement system
¨ Microwave imaging system (Ground Penetrating Radar) for inspection of concrete structures
Remote field eddy current instrument for NDE of ferromagnetic tubes
Experimental set up for magnetic flux leakage NDE
RECENT ACTIVITIES
Development of Electromagnetic Techniques/Instrumentation
¨ Realisation of remote field eddy current technology for Steam Generators
¨ Actualisation of magnetic flux leakage technology
¨ Establishing imaging system for eddy currents and flux leakage
¨ EC-GMR technique for detection of corrosion in SS Tanks
¨ Two-frequency saturation technique for SG tubes & Ni tubes
¨ Pulsed eddy current technique
¨ Concrete inspection using microwave imaging technique
¨ Development of ACPD and ACFM techniques for sizing of cracks
Development of Electromagnetic Sensors
* Micro-Hall sensors for MFL NDE
* Transmit-Receive EC probe for detection of defects in stainless steel welds
* GMR-MFL probe - Deep-surface defects in carbon steel
* High-temperature eddy current probe for weld centerline imaging
* Giant Magneto Impedance (GMI) sensors for electromagnetic applications
Electromagnetic Modelling
· Two and three-dimensional FE modelling of RFEC phenomenon
· FE modelling of fuel clads/slugs
· FE modelling of magnetic flux leakage and ACPD techniques
Signal and Image Processing
à Eigen value based approach for enhancement of EC and MFL images
à Wavelet transform based approach for NDE of banded cladding tubes
à Electronic (phased-array) and mechanical imaging using eddy currents
Material Characterisation
¨ Intergrannular corrosion in stainless steel base metal and welds
¨ Characterisation of microstructures in Ti-alloys
¨ Correlation of third-harmonic ultrasonic amplitude with material characteristics
¨ Characterisation of microstructure in M250-Maraging steel using eddy currents, XRD and Magnetic Brakhausen Emission (MBE) techniques.
¨ Material characterization using XRD (characterization of synthesized nanoparticles)
¨ Residual stress measurement using XRD
¨ Texture measurements on Zr- 2.5% Nb alloy tubes using XRD, to correlate with creep properties
Pre-service and In-service Inspection
· Quality assurance of SG tubes at NFC
· Remote field in-service inspection of SG test facility
· Inspection of calandria tubes of MAPS and NAPS during en masse coolant channel replacement
· Identification of rebarless region in concrete structures using microwave imaging system