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Registration Number

0211U005657, 0111U004948 , R & D reports

Title

Low-temperature plastic deformation mechanisms of nanocrystalline Ti and Zr.

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Head

Tabachnikova Olena,

Registration Date

20-12-2011

Organization

B.Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine

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Several structural states of nanocrystalline zirconium with an average grain size of about 100 nm were obtained by the High Pressure Torsion method. Nanocrystalline zirconium was studied by X-ray diffraction, transmission electron microscopy and differential scanning calorimetry to determine the microstructure, phase composition and thermal stability of this material. The presence of a phase transition during High Pressure Torsion at 4 GPa, and the reverse phase transition during annealing at 300 °C was revealed. It was shown during the study of mechanical properties that the main mechanism of plastic deformation is glide of prismatic dislocations, and at low temperatures a significant contribution to plastic deformation gives twinning.

Product Description

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Бенгус Володимир Зямович
Подольський Олексій Володимирович
Псарук Ігор Андрійович
Смірнов Сергій Миколайович
Табачнікова Олена Дмитрівна