Study of localized deformation zones by nondestructive testing methods in structural and heat-resistant steels

The paper presents the results of the analysis of the microstructure, mechanical and acoustic characteristics of the metal of heat power equipment after long-term operation, made of structural steels in areas of localization of plastic deformation. We study specimens made of the 0.2 C steel and the 0.12C-1Cr-1Mo-1V steel in the initial state and after operation for 219 and 360 thousand hours, respectively. Changes in the structure, mechanical and acoustic characteristics of the investigated materials are established.