Contents

Russian Journal of Nondestructive Testing

Vol. 57, No. 10, 2021

Acoustic Methods

Vibrations of a Layer with Delamination in the Framework of the Gradient Elasticity Theory

A. O. Vatul’yan and O. V. Yavruyan p. 825  abstract

Method of Processing Acoustic Information for Purposes of Monitoring State of Valves of Gas Cleaning Equipment

A. S. Martyugov, E. V. Ershov, I. A. Varfolomeev, D. V. Bogachev and L. N. Vinogradova p. 838  abstract

Diagnosing the Vibration State of the Rotors of a Double-Flow Turbojet Engine Using Phase-Frequency Characteristics Obtained without Using a Shaft Position Sensor

S. L. Zvonarev, A. I. Zubko and A. A. Zubko p. 846  abstract

Electromagnetic Methods

Testing for Defects in Pulsed Magnetic Field Transmitted Through Metal

V. V. Pavlyuchenko and E. S. Doroshevich p. 856  abstract

Electromagnetic Methods for Testing Changes in Stress-Strain State of Dielectric Materials

A. A. Bespal’ko, D. D. Dann, M. V. Petrov, E. K. Pomishin, G. E. Utsin and P. I. Fedotov p. 865  abstract

Field Test Method of the Resistance to Harmful Substances Intrusion of In-Service Marine Concrete Structures

Lipeng Wu and Haitao Yang p. 877  abstract

Radiation Methods

A Portable Radiometric System, Its Basic Elements, and Applications

S. V. Pankin and A. I. Surdo p. 890  abstract

Simulation Model for Studying Object Structure Using Method of Layer-by-Layer Digital Compton Radiography

S. P. Osipov, E. Yu. Usachev, S. V. Chakhlov and O. S. Osipov p. 897  abstract

A Microwave Coaxial Sensor for Non-Destructive Detection and Analysis of Cracked Teeth

Zhen Li, Jinjin Qi, Zhaozong Meng, Ping Wang, Constantinos Soutis and Andrew Gibson p. 909  abstract

General Flaw Detection Issues

Application of Non-Destructive Testing for Condition Analysis, Repair of Damages and Integrity Assessment of Vital Steel Structures

Miodrag Arsić, Dušan Arsić, Željko Flajs, Aleksandar Grbović and Aleksandar Todić p. 918  abstract