Nondestructive Testing and Evaluation, Magnetic Field Sensing, Electromagnetic NDT, Sensor Developement, Magnetic Flux Leakage, Magnetic Barkhausen Noise, SQUID sensors for NDT
Study of Change in Stainless Steel Plate Thickness using S-Domain Parameters Derived from Transient Eddy Current Oscillations Method Yesudasu Bammidi, ChandraS Angani, KSambasiva Rao, M.B. Kishore, G.Krishna Podagatlapalli, S. Sreedhar Journal of Magnetics, 2022 Failures in the industrial components are unavoidable due to material degradation from various sources, thus continuous monitoring and timely inspection is mandatory for structural safety. In the present study, the recently developed Transient Eddy Current Oscillations (TECO) method is used to detect wall-thinning in a stainless-steel plate. Unlike the conventional Eddy Current Testing impedance plane data a new interpretation method has been implemented to identify a thickness variation using the S-domain parameters. Furthermore, time and frequency spectral features are analysed to get more insight into the results. The decay time and the resonant frequency are the basis for the discussion to assess the wall thickness.
Gold-coated silicon nanoripples achieved via picosecond laser ablation for surface enhanced Raman scattering studies Ravi Kiran Avasarala, Twinkle Jena, Santosh Kumar Balivada, Chandrasekhar Angani, Hamad Syed, Venugopal Rao Soma, G Krishna Podagatlapalli Results in Optics, 2021 We report the results from ablation studies of polished single crystalline Si targets (of resistivity 1–10 Ohm-cm) submerged in acetone by employing the focused Airy pattern of the p-polarized laser pulses of duration ∼ 2 ps. The Airy pattern was obtained by inserting a circular aperture with hard edge before the focusing convex lens. The ablation was performed on the Si substrate at diverse scanning speeds of the motorized stage (25–600 μm/sec) with a fixed pulse energy (∼50 μJ) resulting in high/low spatial frequency laser induced periodic surface structures (HSFLIPSS/ LSFLIPSS). These are believed to be the outcome of varied electric fields and the varied pulse numbers at different scan speeds. The effective number of pulses estimated on the Si target demonstrated the surface structures with different grating periods. At lower and higher number of pulses HSFLIPSS were obtained. At an intermediate number of pulses, LSFLIPSS were observed. Further, the obtained HSFLIPSS (with grating periods ∼111 nm, 114 nm) were gold coated (25 nm) with magnetron dc sputtering technique and subsequently employed them for surface enhanced Raman scattering (SERS) studies of explosive molecules 5-amino, 3-nitro, 1,3,5-nitrozole (ANTA) at a very low concentration of 100 nM. SERS imaging of ANTA from the mentioned HSFLIPSS illustrated the uniformity in SERS signatures with an intensity variation below 10% at different locations of the SERS active platform.
Novel time-domain parameters for detection and classification of flaws using pulsed eddy current technique K. Sambasiva Rao, T. V. Beatriceveena, C. S. Angani, Lucky Agarwal Journal of Magnetics, 2020 Pulsed eddy current (PEC) testing is an electromagnetic nondestructive evaluation (NDE) technique which is used for detection and classification of flaws. This paper presents an approach for the extraction of novel timedomain flaw parameters viz. amplitude ratio (V₁/VSUB0/SUB) and time constant (τ) for detection and classification of different flaws. Experiments are carried out on stainless steel (SS-316) plate with artificial EDM notches whose width (1.0 mm & 3.0 mm) and depth (1.0 mm to 6.0 mm) varied. The proposed approach can classify both surface and sub-surface flaws in an 8.0 mm thick SS plate. The advantage of the proposed approach is that it doesn't require a reference signal subtraction or signal processing methodologies for the detection and classification of flaws.
Single-beam femtosecond Z-scan studies of bismuth and manganese co-doped titanium dioxide nanoparticles dispersed in ethanol GK Podagatlapalli, T Jena, S Maddila, S Hamad, S Vadavalli, C Angani, ... RSC advances 16 (12), 11023-11035 , 2026 2026
Electromagnetic Transient Eddy Current CS Angani Proceedings of the International Conference on Emerging Multifunctional … , 2025 2025
Transient eddy current oscillations differential probe to detect thickness of a steel plate Y Bammidi, MS Pilla, KK Yalanati, GK Podagatlapalli, RK Gurazada, ... AIP Conference Proceedings 3198 (1), 020044 , 2025 2025
Strong two and three-photon absorption coefficients of gold-doped titanium di-oxide nanoparticles achieved by femtosecond Z-scan technique GK Podagatlapalli Plasmonics 19 (5), 2433-2447 , 2024 2024 Citations: 11
Electromagnetic Transient Eddy Current Oscillations Differential Probe Technique to Detect Superficial Cracks in Steel Configurations MS Pilla, Y Bammidi, S Nimushakavi, GK Podagatlapalli, KK Yelanati, ... International Conference on Emerging Multifunctional Materials and Devices … , 2024 2024
Thermal performance enhancement on electric vehicle battery with PCM in hot temperature AV Angani, CS Angani, R Konijeti, T Talluri AIP Conference Proceedings 2821 (1), 080026 , 2023 2023
Temperature tunable Bragg transmission multichannel filters made of two quarter-wave stacks separated by defect layers VSB Netheti, BS Kumar, MMS Kumar, A Chandrasekhar, PK Raju, ... Engineering Research Express 5 (1), 015044 , 2023 2023 Citations: 2
Exciton-mediated surface-enhanced Raman studies of Aluminum doped platinum nano colloids M Haribabu, B Dipanjan, MSS Bharati, J Chelsea, A Chandrasekhar, ... Optical Materials 133, 113013 , 2022 2022 Citations: 9
Study of Change in Stainless Steel Plate Thickness using S-Domain Parameters Derived from Transient Eddy Current Oscillations Method Y Bammidi, CS Angani, KS Rao, MB Kishore, GK Podagatlapalli, ... Journal of Magnetics 27 (2), 179-185 , 2022 2022
Gold-coated silicon nanoripples achieved via picosecond laser ablation for surface enhanced Raman scattering studies RK Avasarala, T Jena, SK Balivada, C Angani, H Syed, VR Soma, ... Results in Optics 5, 100153 , 2021 2021 Citations: 12
Detection of Cracks in Stainless Steel Structures Using Transient Eddy Current Oscillations Method SJ Ongole, L Andavarapu, CS Angani Advances in Non-destructive Evaluation: Proceedings of NDE 2019, 153-161 , 2021 2021
Novel time-domain parameters for detection and classification of flaws using pulsed eddy current technique KS Rao, TV Beatriceveena, CS Angani, L Agarwal Journal of Magnetics 25 (3), 434-439 , 2020 2020 Citations: 2
Development of IoT Based Meteorological Measurement System PKR C Mani Kumar G Raja Kullayappa, Shahid Ali, A Chandra Shekhar International Journal of Innovative Technology and Exploring Engineering … , 2019 2019
Novel austenitic steel ageing classification method using eddy current testing and a support vector machine MP Arenas, TJ Rocha, CS Angani, AL Ribeiro, HG Ramos, CB Eckstein, ... Measurement 127, 98-103 , 2018 2018 Citations: 37
Performance evaluation of the newly developed impedance analyzer by measuring and comparing the electrical and thermal properties of BaTiO3+ Ni0. 5Zn0. 5Fe2O4 materials PK Raju, C Kavitha, AC Sekhar Materials Today: Proceedings 5 (12), 25782-25788 , 2018 2018
Characterization of pulsed eddy current signals to discriminate cladding change over wall thinning of ferromagnetic pipes MB Kishore, DG Park, CS Angani, DH Lee Materials Today: Proceedings 5 (12), 25843-25849 , 2018 2018 Citations: 8
Mapping of Impact Damage in Composite Materials Using Differential ECT Probe HGR Angani, C.S, Pasadas, D.J., Ribeiro, A.L. Studies in Applied Electromagnetics and Mechanics 42, 195-201 , 2017 2017 Citations: 1
Evaluation of transient eddy current oscillations response for thickness measurement of stainless steel plate CS Angani, HG Ramos, AL Ribeiro, TJ Rocha Measurement 90, 59-63 , 2016 2016 Citations: 25
Detection of wall thickness of stainless steel using transient eddy current oscillations method CS Angani, HG Ramos, AL Ribeiro Electromagnetic Nondestructive Evaluation (XIX), 70-76 , 2016 2016 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Evaluation of pulsed eddy current response and detection of the thickness variation in the stainless steel DG Park, CS Angani, GD Kim, CG Kim, YM Cheong IEEE transactions on magnetics 45 (10), 3893-3896 , 2009 2009 Citations: 100
The pulsed eddy current differential probe to detect a thickness variation in an insulated stainless steel CS Angani, DG Park, CG Kim, P Leela, P Kollu, YM Cheong Journal of Nondestructive Evaluation 29 (4), 248-252 , 2010 2010 Citations: 81
Detection of the subsurface cracks in a stainless steel plate using pulsed eddy current DG Park, CS Angani, BPC Rao, G Vértesy, DH Lee, KH Kim Journal of Nondestructive Evaluation 32 (4), 350-353 , 2013 2013 Citations: 66
Differential pulsed eddy current sensor for the detection of wall thinning in an insulated stainless steel pipe CS Angani, DG Park, GD Kim, CG Kim, YM Cheong Journal of Applied Physics 107 (9) , 2010 2010 Citations: 65
Lift-off point of intersection feature in transient eddy-current oscillations method to detect thickness variation in stainless steel CS Angani, HG Ramos, AL Ribeiro, TJ Rocha, P Baskaran IEEE Transactions on Magnetics 52 (6), 1-8 , 2016 2016 Citations: 55
Studies to optimize the probe response for velocity induced eddy current testing in aluminium TJ Rocha, HG Ramos, AL Ribeiro, DJ Pasadas, CS Angani Measurement 67, 108-115 , 2015 2015 Citations: 47
Pulsed eddy current differential probe to detect the defects in a stainless steel pipe CS Angani, DG Park, CG Kim, P Leela, M Kishore, YM Cheong Journal of Applied Physics 109 (7) , 2011 2011 Citations: 47
Novel austenitic steel ageing classification method using eddy current testing and a support vector machine MP Arenas, TJ Rocha, CS Angani, AL Ribeiro, HG Ramos, CB Eckstein, ... Measurement 127, 98-103 , 2018 2018 Citations: 37
Transient eddy current oscillations method for the inspection of thickness change in stainless steel CS Angani, HG Ramos, AL Ribeiro, TJ Rocha, B Prashanth Sensors and Actuators A: Physical 233, 217-223 , 2015 2015 Citations: 35
Quantitative evaluation of corrosion in a thin small-bore piping system using bobbin-type magnetic camera M Le, H Vu, J Kim, CS Angani, J Lee Journal of Nondestructive Evaluation 33 (1), 74-81 , 2014 2014 Citations: 28
Evaluation of transient eddy current oscillations response for thickness measurement of stainless steel plate CS Angani, HG Ramos, AL Ribeiro, TJ Rocha Measurement 90, 59-63 , 2016 2016 Citations: 25
Dual core differential pulsed eddy current probe to detect the wall thickness variation in an insulated stainless steel pipe CS Angani, DG Park, CG Kim, P Kollu, YM Cheong Journal of Magnetics 15 (4), 204-208 , 2010 2010 Citations: 17
Magnetic leakage testing using linearly integrated hall and GMR sensor arrays to inspect inclusions in cold-rolled strips CS Angani, J Kim, M Le, J Lee IEEE Transactions on Magnetics 50 (11), 1-4 , 2014 2014 Citations: 16
The effects of lift-off from wall thinning signal in pulsed eddy current testing DG Park, CS Angani, MB Kishore, CG Kim, DH Lee Journal of Magnetics 17 (4), 298-301 , 2012 2012 Citations: 14
Gold-coated silicon nanoripples achieved via picosecond laser ablation for surface enhanced Raman scattering studies RK Avasarala, T Jena, SK Balivada, C Angani, H Syed, VR Soma, ... Results in Optics 5, 100153 , 2021 2021 Citations: 12
Non-destructive testing of inclusions in cold-rolled strip steels using hall and giant magnetoresistance sensor arrays CS Angani, J Kim, M Le, J Lee International Journal of Applied Electromagnetics and Mechanics 45 (1-4 … , 2014 2014 Citations: 12
Strong two and three-photon absorption coefficients of gold-doped titanium di-oxide nanoparticles achieved by femtosecond Z-scan technique GK Podagatlapalli Plasmonics 19 (5), 2433-2447 , 2024 2024 Citations: 11
Application of the Pulsed Eddy Current technique to inspect pipelines of nuclear plants DG Park, CS Angani, MB Kishore, G Vértesy, DH Lee Journal of Magnetics 18 (3), 342-347 , 2013 2013 Citations: 11
Differential pulsed eddy current probe to detect the sub surface cracks in a stainless steel pipe DG Park, CS Angani, YM Cheong 18th world conference on nondestructive testing , 2012 2012 Citations: 11
Ion-irradiation-induced effects on the magnetic properties of co-based amorphous ribbon DG Park, IJ Lee, CY Park, CS Angani, CG Kim, YM Cheong IEEE Transactions on Magnetics 46 (2), 662-665 , 2010 2010 Citations: 11
