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Martensitic transformation in the non-stoichiometric intermetallic compound Ti3Sn and its mechanical behaviour

Work number - M 14 FILED

Author: Ivanova O. M.

A series of the work consist from 8 scientific articles and 8 abstracts of conferences published during 2011-2015 years.

Crystal lattice changes during martensitic transformation from orthorhombic to hexagonal phase in the non-stoichiometric intermetallic compound Ti75.5Sn24.5 are investigated and extensive studying of its mechanical behavior and fracture is performed.

Several important results in the area of martensitic transformation are obtained: marteinsitic transformation from hexagonal to orthorhombic phase is observed in first time; crystal structure of martensitic orthorhombic phase, orientation relationships between austenite and martensite, twinning plane of martensitic phase and Bain deformation related to hexagonal-to orthorhombic martensitic transformation in Ti75.5Sn24.5 are determined in first time. 

A series of the work contains important results into mechanical behavior investigation of Ti75.5Sn24.5: pseudoelastic behavior observed in this material in first time causes extremely low apparent Young’s modulus ( around 10 GPa at room temperature) which in conjunction with biocompatibility gives a perspective to use Ti75.5Sn24.5-based materials for  orthopedic and orthodontic  implants instead of toxic Ti-Ni alloys. Another important result is studying  of  damping capacity of Ti75.5Sn24.5-based alloys that reaches to high values ( up to 25%) comparable with other high-damping  materials with martensitic transformation and gives a possibility of use of Ti75.5Sn24.5-based alloys as high damping system.

Obtained results are important for development of Ti75,5Sn24,5- based materials with low Young’s modulus or high damping capacity and good mechanical properties.

Results of investigations are shown in 16 publications including 8 articles into scientific journals. Author’s  h-index equals 2 according to Scopus. Author’s publications are referenced in 5 scientific journals.