Metal Forming Aspects of Cyclic Severe Plastic Deformation of Ti-Ni Shape Memory Alloys Using MaxStrain Device

Victor Komarov; Irina Khmelevskaya; Grzegorz Korpala; Rudolf Kawalla; Sergey Prokoshkin

doi:10.4028/www.scientific.net/KEM.746.214

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Metal Forming Aspects of Cyclic Severe Plastic Deformation of Ti-Ni Shape Memory Alloys Using MaxStrain Device
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 746Metal Forming Aspects of Cyclic Severe Plastic...

Metal Forming Aspects of Cyclic Severe Plastic Deformation of Ti-Ni Shape Memory Alloys Using MaxStrain Device

Abstract:

The effect of severe plastic deformation using MaxStrain (MS) device which is a part of the Gleeble thermo-mechanical simulator of rolling and forging processes on the structure and functional properties of Ti–50.0 at.% Ni shape memory alloy has been studied. The use of the MS module allows performing SPD of the material under isothermal conditions with precise control of the deformation parameters. The deformation temperature was lowered from 370 to 330 °C. The accumulated true strain varied from e=4.6 to 9.5. Structure features were studied by the transmission electron microscopy. The maximum completely recoverable strain was determined by a thermomechanical method using a bending mode for strain inducing. A mixed submicrocrystalline and nanosubgrained structure with average grain/subgrain size below 100 nm was formed using SPD at 330 °C. A very high completely reсoverable strain (9.3%) was obtained against a reference treatment (2.5%).

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Periodical:

Key Engineering Materials (Volume 746)

Pages:

214-218

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.746.214

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Online since:

July 2017

Authors:

Victor Komarov*, Irina Khmelevskaya, Grzegorz Korpala, Rudolf Kawalla, Sergey Prokoshkin

Keywords:

Functional Properties, Nanocrystalline Structure, Severe Plastic Deformation, Shape Memory Alloys, Thermomechanical Treatment, Titanium Nickelide

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