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Registration Number

0220U101702, 0119U101189 , R & D reports

Title

Development of technology of combined deformation and diffusion modification of surface layers of structural elements of aviation engineering from titanium alloys

Head

Lukyanenko Oleksandr G., Кандидат технічних наук

Registration Date

18-02-2020

Organization

Karpenko Physico-Mechanical Institute of NASU

Description

 The wear resistance of two-phase titanium alloys BT6 (Ti-6Al-4V) and T110 (Ti-Al-Mo-V-Nb-Fe-Zr) after the formation of a hardened surface layer by the combination of cold surface plastic deformation (HSPD) and diffusion gas nitriding was investigated. The influence of the method of rolling ШХ15 balls on the structure and properties of the surface layers of titanium alloys BT6 and T110 is analyzed. The dependences of the phase composition and structure of the surface layers, the hardness and the depth of the modified layer of two-phase titanium alloys BT6 and T110 on the parameters of cold surface plastic deformation. 4 It is established that the formation of the pre-crushed structure-phase state of the surface layers of the BT6 and T110 alloys by the HSPD method, which leads to an increase in the area of intergranular boundaries, influences the intensification of the diffusion of nitrogen, an increase in the depth of the nitrided layer and an increase in its strength. The wear resistance of titanium alloys BT6 and T110 after cold surface plastic deformation combined with chemical-thermal treatment was evaluated, and the positive effect of such deformation-diffusion treatment on the level of tribotechnical characteristics was tested at the friction test with БрАЖН 10-4-4.

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Kravchyshyn Taras M.
Lavrys' Sergiy M.
Lukyanenko Oleksandr G.
Pohreliuk Iryna M.