Materials Transactions Online

Materials Transactions, Vol.49 No.01 (2008) pp.97-101
© 2008 The Japan Institute of Metals

Nanostructuring of TiNi Alloy by SPD Processing for Advanced Properties

Ruslan Valiev1, Dmitry Gunderov1, Egor Prokofiev1, Vladimir Pushin2 and Yuntian Zhu3

1Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marx str., Ufa 450000 Russia
2Institute of Metal Physics, Ural Division of Russian Academy of Sciences, 18 S. Kovalevskaya str., Ekaterinburg 620219 Russia
3Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919 USA

Ultrafine-grained (UFG) alloy Ti49.4Ni50.6 possessing both nano- as well as submicrocrystalline structure has been successfully produced using two techniques of severe plastic deformation (SPD) processing: high pressure torsion and equal channel angular pressing. The features of microstructure, martensitic transformation and deformation behavior of the UFG alloy have been studied in details. The effects of grain size on the mechanical and functional properties of the alloy are discussed.

(Received 2007/8/10; Accepted 2007/10/23; Published 2007/12/12)

Keywords: severe plastic deformation, ultrafine grains, mechanical properties, shape memory titanium nickel alloy

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