A. Yu. Naumuk | Searcharxiv

arXiv2025

Thermodiffusion mechanism for the formation of an amorphous phase during the quenching of a metal melt

A theoretical model of the formation of an amorphous phase during the quenching of a metallic melt is proposed. It has been shown that the appearance of a significant temperature gradient during the quenching of a metallic melt leads to thermodiffusion of defects and their outflow from the melt volume, which manifests itself in a significant reduction in the number of free spaces for the diffusion transfer of the atoms of the melt. Due to the thermodiffusion process, a significant restructuring of the microstructure of the medium occurs, which leads to a significant increase in viscosity, a decrease in the diffusion coefficient and specific volume of the substance, and changes in the mechanisms of deformation. The corresponding calculations of temperature distribution, thermodiffusion and distribution of the components of the melt have been carried out.

cond-mat.mtrl-sci↗

arXiv2023

Emission Transfer of Interstitial Atoms Under Shock Deformation of a Metal Surface

The process of anomalous transfer of interstitial atoms during impact deformation of the crystal surface is described theoretically. As shown that surface impact leads to the formation of a wave of inhomogeneous atomic displacements in the medium, which propagates from the surface into the depth of the crystal. The formation of a deformation wave leads to a change in the interatomic distance at the wave front and a change in the potential energy for interstitial atoms. Interstitial atoms at the front of the deformation wave receive an additional impulse, which leads to an increase in their kinetic energy and contributes their movement deep into the crystal.

cond-mat.mtrl-sci↗