Studies on structural heterogeneity of high-strength sheet materials

Abstract

The work is devoted to the actual scientific and practical task of applying the methods of researching the processes of damage accumulation in metals under the conditions of active operation of structures and selecting the necessary parameters characterizing the degree of material degradation to assess the load-bearing capacity of structural elements, taking into account their current damage.
 The approbation of the express control method for diagnosing the current state of the surface of a large area based on the characteristics of the dispersion of material hardness values is described. It is shown that it is possible to obtain a quantitative characteristic of the state of the metal using the LM - hardness method, according to which the parameters of the dispersion of its values during mass measurements of hardness are accepted as informative signs of the state of the metal. Experimental results were obtained during the study of high-strength materials such as Armox 500T, Hardox 450, etc. The obtained results made it possible to improve the quality of non-destructive testing of metal by the characteristics of dispersion of material hardness values and to perform a number of practical works on assessing the condition of real metal blanks used in the creation of responsible technical products or structural elements