Open AccessМодель растворения пор на границах зерен при отжиге ультрамелкозернистого алюминиевого сплава
Author(s) -
М.Ю. Гуткин,
Т.С. Орлова,
Н.В. Скиба
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.18.51472.18872
Subject(s) - grain boundary , dissolution , climb , materials science , annealing (glass) , alloy , metallurgy , chemical engineering , thermodynamics , microstructure , physics , engineering
A theoretical model which describes the mechanism of pore dissolution at grain boundaries in ultrafine-grained materials during the ageing annealing is suggested. Within the framework of the model, pore dissolution occurs due to the emission of vacancies and the climb of grain-boundary dislocations along the grain boundary towards the pore. It is shown that in this case there is a significant decrease in the total energy of the system. The results of the model are in good agreement with the available experimental observations of pore dissolution during annealing of ultrafine-grained Al-Zr alloy.