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Information × Registration Number 0220U101700, 0119U101614 , R & D reports Title Development of technology for surface modification of titanium components of friction pairs of artificial joints popup.stage_title Head Pohreliuk Iryna M., Доктор технічних наук Registration Date 18-02-2020 Organization Karpenko Physico-Mechanical Institute of NASU popup.description2  Scientific and technical principles of cold surface plastic deformation of spherical parts and thermodiffusion nitriding of spherical heads of technically pure titanium BT1-0 for endoprosthesis of the hip joint have been developed. It is shown that pre-cold surface plastic deformation provides an increase in the level of surface hardening, which is reflected in the displacement of the microhardness distribution curves along the intersection of the surface hardened layers in the region of higher hardness values. It was found that the microhardness of the surface layer of 20 μm thickness, formed after the combined treatment, is 1.3-1.4 times higher than after nitriding. Increasing the degree of deformation hardening contributes to the microhardness of the nitrided layer. It has been found that a higher gradient of microhardness of the strengthened nitrided surface layer is formed during the accumulation in liquid nitrogen than for the accumulation in air. Product Description popup.authors Pohreliuk Iryna M. Proskurnyak Roman V. Tkachuk Оleg V. popup.nrat_date 2020-04-02 Close