Open AccessСубструктурно-фазовые превращения при термообработках нанокристаллического сплава Ti-50.9 at.% Ni
Author(s) -
Т. М. Полетика,
С. Л. Гирсова,
А. И. Лотков,
К. В. Круковский
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.24.47023.17444
Subject(s) - nanocrystalline material , alloy , transmission electron microscopy , materials science , precipitation , recrystallization (geology) , dissolution , metallurgy , solid solution , crystallography , chemical engineering , chemistry , nanotechnology , geology , paleontology , physics , meteorology , engineering
The method of transmission electron microscopy is used to study the grain-subgrain structure of the Ti–50.9 at % Ni nanocrystalline alloy after heat treatments at 300–500°C. It is found that the decomposition of the B_2 solid solution of TiNi by the heterogeneous mechanism occurs in the subgrain structure, while the Ti_3Ni_4 particles are not observed in nanograins. The features of the recovery and recrystallization of the alloy and their relationship with the processes of dissolution and precipitation of Ti_3Ni_4 particles are revealed.