Open AccessDislocation structure of dicotyledonous bimetals under external harmonic influence: molecular dynamics modeling
Author(s) -
Pavel Zakharov,
A. M. Eremin,
S A Safronova,
А. В. Маркидонов,
М. Д. Старостенков
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/862/2/022010
Subject(s) - bimetal , dislocation , materials science , annealing (glass) , molecular dynamics , condensed matter physics , crystallography , chemical physics , chemistry , composite material , computational chemistry , physics
In this article, we study the structure of the network of dislocations near the boundary of a dicotyledonous bimetal Ni-Al under intense external harmonic influence. The method of molecular dynamics was chosen as the method, using potentials obtained by the immersed atom method. The paper analyzes the behavior of dislocation segments as a function of the intensity of exposure in the presence of vacancies near the boundary of a bipartite bimetal. It is shown that the frequency of exposure significantly affects the change in the structure of bimetal. In this case, point defects in the form of vacancies play an important role. The analysis was carried out by heating the calculated cells, the temperature of which is not more than half the melting temperature of the materials. Comparison with annealing of defects showed that structural changes in dislocations occur at lower temperatures, and their flow rate is higher.