METHOD OF PRODUCING INDIVIDUAL ARTICLES FROM AN ALLOY OF Ti-Zr-Nb SYSTEM WITH SHAPE MEMORY AND LOW MODULUS BY SELECTIVE LASER MELTING Russian patent published in 2025 - IPC B22F10/28 C22C14/00 B22F3/105 A61L27/06 B33Y10/00 B33Y80/00 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of articles from titanium-zirconium-niobium superelastic alloy. It can be used for production of individual orthopaedic implants and other articles. By gas spraying of electrode of alloy subjected to vacuum remelting by induction heating and containing, at.%: niobium 13.8±0.5, zirconium 17.5±0.5, titanium – balance, powder with particle diameter of 10-50 mcm is obtained. Selective laser melting is carried out while ensuring the distance between the laser passages of 0.04-0.11 mm, the layer thickness of 0.02-0.04 mm, the scanning speed of 800-1800 mm/s, with the laser power of 130-180 W, volumetric energy density during laser melting 50-90 J⋅mm^-3 and construction rate of 1.94-2.64 mm³⋅s^-1. Then thermal treatment is performed at 550-600 °C for 30 minutes in an atmosphere of inert gas or in a vacuum with subsequent cooling at rate of 1-500 °C/s in air or in water.

EFFECT: obtaining articles with Young's modulus of 40-60 GPa, ultimate tensile strength of not less than 600 MPa and reversible superelastic deformation of not less than 1.5%.

1 cl, 2 ex