Open AccessEffect of heat treatments on the structure and properties of a small-diameter thin-walled tube of a medical nickel titanium alloy
Author(s) -
О. А. Кашин,
К. В. Круковский,
Т. М. Полетика
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1347/1/012085
Subject(s) - materials science , annealing (glass) , metallurgy , grain size , alloy , nickel titanium , diffusionless transformation , nickel , titanium , titanium alloy , composite material , tube (container) , martensite , shape memory alloy , microstructure
The present study examines the effect of annealing at temperatures of 300-500°C on the structure and properties of a thin-walled nitinol tube of composition Ti 49.1 Ni 50.9 used for the manufacture of intravascular stents. Annealing temperature dependences are obtained for the martensitic transformation temperatures, the size of the structural elements of the grain-subgrain structure, phase composition, pseudo-yield stress, and ultimate strength. The effect of the Ti 3 Ni 4 particle precipitation in aging during annealing at different temperatures on the obtained dependences is analyzed.