Study of the structure and mechanical properties of titanium nickelid samples obtained by the SLM method

The study investigates the structure and mechanical properties of titanium nickelide samples produced by selective laser melting at scanning speeds ranging from 200 to 1100 mm/s. It is shown that selective laser melting parameters have a significant impact on the microstructure and strength characteristics of the material. At low scanning speeds (200 mm/s), a dense structure with high strength (up to 938 MPa) is formed, while an increase in the scanning speed (1100 mm/s) leads to the formation of incomplete melting defects and a decrease in strength to 530 MPa. Optimal characteristics are achieved at intermediate scanning speeds (600-850 mm/s), which increase deformation due to a more uniform microstructure. The results obtained allow optimizing selective laser melting modes in the manufacture of TiNi alloy structures.

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