Open AccessЭволюция микроструктуры и системы частиц Ti-=SUB=-3-=/SUB=-Ni-=SUB=-4-=/SUB=- 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 - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2019.04.47308.259-18
Subject(s) - nanocrystalline material , materials science , annealing (glass) , transmission electron microscopy , alloy , recrystallization (geology) , metallurgy , dissolution , solid solution , chemical engineering , crystallography , nanotechnology , chemistry , paleontology , engineering , biology
The structure of a Ti−(50.9 at % Ni) nanocrystalline alloy is studied by transmission electron microscopy after annealing at 300−500°C. It is found that B2-TiNi solid solution decomposition according to a heterogeneous mechanism with formation of Ti_3Ni_4 particles develops in the subgrain structure and is suppressed in nanograins. The regularities of recovery, polygonization, and recrystallization in the grain/subgrain structure of a nanocrystalline TiNi alloy are established and their interconnection with processes of dissolution and coagulation of Ti_3Ni_4 particles is identified.