ДЕФОРМАЦИОННЫЙ РЕЛЬЕФ – ОТРАЖЕНИЕ ВНУТРЕННИХ ПРОЦЕССОВ ПРИ ПЛАСТИЧЕСКОЙ ДЕФОРМАЦИИ МОНОКРИСТАЛЛОВ НИКЕЛЯ

Abstract

In spite of the fact that the deformation relief is the case study of the scientists of physics of metals for several decades, there are a large number of issues associated with the mechanisms and the objective of its formation. Moreover, the development of the instrumental base allows carrying out the detailed experimental studies at the better than ever level. One of the most relevant issues during plastic deformation of metals is the destruction of a crystal that is caused by the formation of areas with the high allocation of deformation. Basing on the deformation relief, many researchers analyze the state of a material from the point of view of preserving the crystal integrity. This study is aimed to determine the methods of formation of structural elements of deformation relief of various types (slip traces, meso- and macrobands, and corrugated surface) and to identify the role of each type of relief in the increase and decrease of local deformation. The authors carried out the experimental study on the compressive deformation of FCC nickel single crystals of different crystallographic orientation and the further study of the deformation relief. To analyze the relief, the authors used optical microscopy, confocal laser scanning microscopy, and the reflection electron diffraction method; to process the results, the statistical and fractal analysis was used. The study determined the methods of formation of structural elements of the deformational relief (slip traces, meso- and macrobands, and corrugated surface), specified their common and distinctive features. The paper sets the objective of self-organization of traces of slip into the relief elements of a larger scale level (band of slip tracks, meso- and macrobands) and identifies the methods of self-organization of slip traces at the micro- and mesolevel.