|Number of page(s)||6|
|Section||Applied Research and Applications: Testing and Modelling|
|Published online||01 September 2009|
Study of nanostructured NiTi shape memory alloy’s structure and functional propertiesAfonina V.S.1, Gizatullin R.M.2, Gunderov D.V.3, Kalashnikov V.S.1, Koledov V.V.4, Shavrov V.G.4 and Istomin-Kastrovsky V.V.4
1 Moscow State Technical University n. a. N.E. Bauman, 2-nd Baumanskaya, 5, 105005, Moscow, Russia.
2 “Nano-Dent” Co Ltd, Moscow, Russia
3 Ufa State Aviation Technology University, Karl Marks st. 12, 450000, Ufa, Russia
4 Kotelnikov’ Institute of Radioengineering and Electronic of Russian Academy of Sciences, 125009, Mokhovaya 11-7, Moscow, Russia
Published online: 1 September 2009
The present work is aimed to study of nanostructured NiTi shape memory alloy’s structure and functional properties depending on the type of thermo mechanical treatment. Structure, recoverable strain and reactive force were compared for coarse grain alloys and nanostructured alloy which was prepared by equal chanal angular pressing. The structure of the nanostructured NiTi was studied by means of TEM. Functional properties were studied by three point bending method in wide temperature range. The processing of the alloy by equal canal angular pressing at 450C results in formation of the structure with mean grain size about 300 nm. The functional properties of nanostructured and coarse grain alloys were compared in terms of maximal recoverable strain, maximal reactive force, specific energy capacity and functional inflexibility. It was found that nanostructured alloy generates essentially higher maximal recoverable force, has higher specific energy capacity and functional inflexibility than coarse grain one deformed as well (up to 7%). These advantages are most favourable in the field of applications of the shape memory alloys to surgical or dental implant’s design.
© Owned by the authors, published by EDP Sciences 2009