Russian scientists have significantly improved the characteristics of titanium nickelide (TiNi), one of the most widely used shape memory alloys. Through a nanostructuring method applied to the alloy, they increased its service life, as well as enhanced its hardness and reduced its friction coefficient. These improvements were achieved using rotary forging, which creates nanostructures in the material.
Titanium nickelide is used in the automotive industry, aviation, robotics, and medicine, where specific mechanical properties and high tribotechnical performance are required. During the study, scientists compared the microstructure, phase composition, as well as the mechanical and tribological properties of the alloy in its initial coarse-grained state and in the state obtained through nanostructuring.
Nanostructuring, supplemented by annealing, made it possible to change the dominant wear mechanisms, which led to an improvement in wear resistance by more than 45% compared to the initial state. The hardness of the alloy increased by 40%, and the friction coefficient decreased by almost 20%. These results highlight the possibility of significantly increasing the service life of TiNi products that are subjected to tribomechanical stresses during operation.
The research was conducted by scientists from Tambov State University in collaboration with the NUST MISIS University and the A. A. Blagonravov Institute of Mechanical Engineering of the Russian Academy of Sciences (IMASH RAS). The developed methods can contribute to the further development of technologies and innovations in various industries.
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