The purpose of this study was to quantitatively investigate the relaxation structure formation in polycrystalline nickel deformed by rolling at room temperature. The relaxation structures were examined on polycrystalline nickel with a purity of 99.99% Ni, deformed by rolling. The sub-structure of nickel after rolling to 50-80% was examined by the TEM and X-ray analysis methods by line profile analysis. It was revealed the presence of three qualitatively different types of structural elements: microbands of a macroscopic length; cells of different shapes and dimensions; micrograins less than 80 nm in size. The normalized curves of distribution of cells dimensions coincide, which suggests a scale invariance of these parameters. On the other hand, addition of normalized dimensions of micrograins to statistical dependence of dimensions of the cells leads to distortion of the dependence. The mechanisms of formation of the cells and micrograins to be different: micrograins were shown are nuclei of primary recrystallization.Formation of structure in metal during and after plastic deformation may occur according to two scenarios:• relaxation structure formation (formation of cellular and polygonal structure, recrystallization), which is characterized by the kinetics that depends on the temperature, nature of a material, and deformation conditions; scaling (scale invariance) of dimensions and disorientations (Ref 1-10); • self-organization of deformed crystal, i.e. synergetic structure formation, which is characterized by the stepwise kinetics (can be described using the d-function), cooperative character of the process that simultaneously involves macro volumes of the material being analysed, and fractal morphology of different scales of structures .The purpose of this study was to quantitatively investigate the relaxation structure formation in polycrystalline nickel deformed by rolling at room temperature. The relaxation structures were classified through their statistical examination by the method of transmission electron microscopy (TEM). The special attention was given to the mechanism of formation of different types of the structures, which was studied by comparing the normalized curves of distribution of their dimensions.The relaxation structures were examined on polycrystalline nickel with a purity of 99.99% Ni, deformed by rolling. The sub-structure of nickel after rolling to 50-80% was examined by the TEM and X-ray analysis methods. The plastically deformed metal is a non-equilibrium system. This shows up, first of all, in the presence of micro and macrostresses, which can be easily determined by the X-ray method, e.g., by line profile analysis (Ref 14,15). For analysis we used two pairs of lines: (111) and (222); (200) and (400). To illustrate, Table 1 gives values of microstresses (r, MPa, 910 4 ) and dimensions of regions of coherent scattering (L, lm) for nickel deformed by rolling and tension. The line profile analysis method was used for the calculations. Figure 1 illustrates examples of profiles of X-Ray...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.