Contents

Russian Journal of Nondestructive Testing

Vol. 57, No. 2, 2021

Acoustic Methods

Modelling Acoustic–Electric Nondestructive Testing for Defects in Dielectric Materials

A. A. Bespal’ko, A. P. Surzhikov, D. D. Dann, G. E. Utsyn, M. V. Petrov and E. K. Pomishin p. 85  abstract

The Influence of Transmission Direction and the Natural Frequency of Transducers during the Testing of Silica Refractory Bricks by the Ultrasonic Pulse Method

J. Brozovsky and L. Bodnarova p. 96  abstract

Ultrasonic Testing of Welds in Thin-Walled Titanium Shells Using an Incomplete Penetration Indicator

R. R. Iskhuzhin, V. N. Borisov, V. G. Atavin, A. A. Uzkikh and K. K. Khafizova p. 105  abstract

Impact Damage Detection in Laminate and Honeycomb CFRPs using Lamb Wave Ultrasonic Sensing

M. V. Burkov, A. V Eremin, A. V. Byakov, P. S. Lyubutin and S. V. Panin p. 114  abstract

The Law of Response of Propagation Time and Amplitude of Ultrasonic LCR Wave in the Elastic-Plastic Deformation of X70 Steel

Hourui Wang, Wenguang Yu, Xi Chen, Dongze Li, Guangzhi Wang, ZeXin Wang, Kaihong Wang, Xin Qiao, Boyu Tian, Shaobo Wang and Zhenjiang Yang p. 125  abstract

Analysis and Examination of Aluminum Sheets Suitable for Automotion Body: Ultrasonic Testing, Signal Processing, Simulation

Esmaeil Mirmahdi p. 135  abstract

Radio Wave Techniques

Determining the Granularity of Radiographic Films in Accordance with ISO 11699-1

N. A. Mikhailova, A. A. Demidov, V. Yu. Chertishchev and N. V. Osiyanenko p. 145  abstract

General Flaw Detection Issues

Preparation of Hydroxyapatite Nanoparticles from Natural Teeth

Fatemeh Mirjalili, Alireza Navabazam and Nina Samanizadeh p. 152  abstract

Characterization of the Interface of a Non-Ferrous Dissimilar Realized by Rotary Friction Welding

A. Mebtouche, B. Bezzazi, N. Ramou, D. Aboudi, Y. Faci and M. Latef p. 163  abstract

Electromagnetic Methods

Estimation Method of Mechanical Properties of Ferromagnetic Materials Based on Pulsed Eddy Current

Li Kaiyu, Qiu Pengcheng, Wang Ping, Lu Zixiang and Zhang Zhengda p. 170  abstract