Mathematical Description and Analysis of Vibration-Induction Transducer Signal Due to Normal Component of Magnetic Scattering Fluxes over a Defective Section

Russian Journal of Nondestructive Testing - A theoretical and experimental study of the output signal of a vibration-induction transducer (VIT) formed when it is exposed to the normal component...     

Features of Eddy-Current Tests of Stepped Axial Bores in Rotors of Turbines of Thermal Power Plants

The paper reports on an investigation of parameters of the applied eddy-current transducer output in the presence of a cylindrical cavity with crack-like discontinuities and an interfering factor in the form of steps, i.e., local variations in the bore diameter. It has proven to be difficult to distinguish between a crack and a step when the recorded parameter is the signal amplitude; the method based on two parameters (amplitude and phase) allows one to get round the difficulties caused by the interfering factor.     

Studying a Signal due to the Tangential Component of Stray Fluxes from a Surface Flaw Detected with a Vibrating Induction Transducer

Analytical dependences of the amplitude spectrum of the output signal of a vibrating induction transducer on its position with respect to a flaw and on vibration-displacement parameters have been derived. The locality of inspection and its selective sensitivity toward flaws have been evaluated. The results of theoretical research have been confirmed experimentally.     

Detection and Analysis of Magnetic Field Anomalies over Surface Defects of Complex-Profile Parts

Measurement Techniques - This article presents an effective method for detecting surface defects via magnetic field anomalies occurring over cracks, cleavages, and crevices of angular elements of...     

Control over the quality of steel in hot rolling by its structure

Conclusions The presented dependences make it possible to predict the structure of strips from various carbon and low-alloy steels, design the manufacturing process, and envisage, in principle, the possibility of correction of the modes of the control computer on a real-time scale. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 52–56, April, 1999.