Features of structure formation in the alloy D16 during asymmetric rolling

Due to the ever-increasing demands of the construction, mechanical engineering, automotive, and other industries, materials engineers are exploring ways to improve the structure and properties of materials by changing their chemical and phase composition. However, one of the strategies for achieving high mechanical characteristics of the material is to select the processing parameters of the material, providing the required structure and properties without changing the chemical composition. Currently, one of the most promising technologies for obtaining the required structure and properties of a material is asymmetric rolling. The mechanics of gradient nanomaterials laboratory of the FSBEI HE Nosov Magnitogorsk State Technical University has implemented asymmetric rolling of aluminum alloy D16 on an industrial laboratory rolling mill 400, which is a unique scientific unit. The presence of an individual drive of the working rolls allows for the implementation of asymmetric rolling processes with the maximum possible ratio of speeds of the working rolls V1 /V2 = 1/10. The results of experimental studies of symmetrical and asymmetric rolling of aluminum alloy D16 on the mill 400 with mismatch speeds of working rolls V1 /V2 = 2/10 are presented. Using computer modeling, studies have been carried out to obtain patterns of thermal fields and the stress-strain state in the deformation zone. It has been revealed that the D16 alloy sheet in the annealed state demonstrates high technological plasticity during cold asymmetric rolling. A microstructural analysis of D16 alloy samples obtained by symmetric and asymmetric rolling at room temperature and relative deformation of 87% has been carried out. The patterns connecting the parameters of the structure with the processing parameters are established. Conclusions are drawn based on the research results.The research was carried out with the financial support of the Russian Science Foundation grant (Agreement No. 23-79-30015).