Magnetic-pulse deformation of TiNi alloy: experiment and calculation
Ostropiko E. S. 1, Magazinov S. G. 1, Krivosheev S. I. 1
1Peter the Great Saint-Petersburg Polytechnic University, St. Petersburg, Russia
Email: es-ostropiko@mail.ru

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Magnetic-pulse loading methods have been known since the 80s of the XX century and, as a rule, are used to determine the laws of destruction of materials under the action of pressure pulses with a duration of several microseconds. A modified scheme of a magnetic-pulse setup for high strain rate uniaxial tension is used in this work. The application of the scheme with the possibility of experimental measurement of the strain accumulation time and strain rate is shown on samples of TiNi alloy. The paper presents the results of finite element modeling and analytical description. Both approaches have demonstrated good agreement between the calculated residual strain and experimental results, even on samples of TiNi alloy with a specific stress-strain diagram. The analytical solution showed good qualitative agreement in assessing the strain accumulation time. On the basis of the analytical solution, an assessment of the capabilities of the magnetic-pulse loading method for uniaxial high strain rate tension is presented. Keywords: magnetic-pulse loading, high strain rate deformation, TiNi alloy
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