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L. Yu. Egorova , Yu. V. Khlebnikova , V. P. Pilyugin , E. G. Chernyshev

INITIAL STAGES IN THE EVOLUTION OF THE STRUCTURE OF A ZIRCONIUM PSEUDO-SINGLE CRYSTAL DURING SHEAR DEFORMATION UNDER PRESSURE

DOI: 10.17804/2410-9908.2017.5.070-079

The structural-phase transformation in a pseudo-single crystal of zirconium during deformation on Bridgman anvils is studied by X-ray spectroscopy with synchrotron radiation. The angles of rotation in Bridgman anvils is varied from φ = 0° (deformation by upsetting, е = 0.2) to φ = 45° (е = 4.6). It is demonstrated that the α-phase lattice is compressed at the value of true strain e = 4.6. On the contrary, the ω-phase arising in the process of deformation under pressure shows a tendency to stretching. This behavior can probably be explained by low atomic density and strong anisotropy in terms of the atomic density of the planes and series of the ω-phase. It has been determined that the structure of the baric ω-phase arising during deformation under the deformation conditions ranging from e = 0.5 to e = 4.6 undergoes no textural changes. The formation of groups of planar defects in the ω-phase is a mechanism for the compensation of elastic stresses during the α→ω lattice transformation under conditions of high quasi-hydrostatic pressure.

Acknowledgements: "Structure", No. 01201463331

Keywords: pseudo-single crystal of zirconium, deformation, high quasi-hydrostatic pressure, α↔ω phase transitions

Bibliography:

  1. Adachi Nozomu, Todaka Yoshikazu, Suzukib Hiroshi and Umemotoa Minoru. Orientation relationship between α-phase and high-pressure ω-phase of pure group IV transition metals. Scripta Materialia, 2015, vol. 98, pp. 1–4. DOI: 10.1016/j.scriptamat.2014.10.029
  2. Fenga Biao, Levitas Valery I. Plastic flows and strain-induced alpha to omega phase transformation in zirconium during compression in a diamond anvil cell: Finite element simulations. Materials Science & Engineering A, 2017, vol. 680, pp. 130–140. DOI: 10.1016/j.msea.2016.10.082
  3. Srinivasarao B., Zhilyaev A.P., Pérez-Prado M.T. Orientation dependency of the alpha to omega plus beta transformation in commercially pure zirconium by high-pressure torsion. Scripta Mater., 2011, vol. 65, no. 3, pp. 241–244. DOI: 10.1016/j.scriptamat.2011.04.017
  4. Shen X., Yu P.F., Jing Q., Yao Y., Gu L., Wang Y.G., Duan X.F., Yu R.C. and Liu R.P. Transmission electron microscopy observations of structural modulation in the phase transition from α-Zr to ω-Zr induced by shear strain. Scripta Materialia, 2012, vol. 67, pp. 653–656. DOI: 10.1016/j.scriptamat.2012.07.017
  5. Degtyarev M.V., Voronova L.M., Chashchukhina T.I., Vykhodets V.B., Davydova L.S., Kurennykh T.E., Patselov A.M., Pilyugin V.P. Formation and Evolution of Submicrocrystalline Structure in Pure Iron upon Shear under Pressure. The Physics of Metals and Metallography, 2003, vol. 96, no. 6, pp. 642–650.
  6. Ancharov A.I., Manakov A.Yu., Mezentsev N.A., Tolochko B.P., Sheromov M.A., Tsukanov V.M. New station at the 4th beamline of the VEPP-3 storage ring. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001, vol. 470, pp. 80–83. DOI: 10.1016/S0168-9002(01)01029-4
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Л. Ю. Егорова , Ю. В. Хлебникова, В. П. Пилюгин , Е. Г. Чернышев

НАЧАЛЬНЫЕ ЭТАПЫ ЭВОЛЮЦИИ СТРУКТУРЫ ПСЕВДОМОНОКРИСТАЛЛИЧЕСКОГО ЦИРКОНИЯ ПРИ ДЕФОРМАЦИИ СДВИГОМ ПОД ДАВЛЕНИЕМ

Проведено исследование начальных этапов эволюции структуры псевдомонокристаллического циркония при деформации на наковальнях Бриджмена с использованием метода рентгеновской дифрактометрии в синхротронном излучении на просвет. Углы поворота наковальни варьировали от φ = 0° (деформация осадкой, е = 0,2) до φ = 45° (е = 2,7). Установлено, что при величине истинной деформации е = 2,7 параметры кристаллической решетки α-фазы уменьшаются. В то же время параметры решетки барической ω-фазы, наоборот, незначительно увеличиваются. Такое поведение, вероятно, можно объяснить небольшой атомной плотностью и сильной анизотропией по атомной плотности плоскостей и рядов ω-фазы. Определено, что структура возникающей в процессе деформации барической ω-фазы в условиях деформирования от е = 0,3 до е = 2,7 не претерпевает текстурных изменений. Образование групп планарных дефектов в ω-фазе представляет собой механизм компенсации упругих напряжений при трансформации кристаллической решетки α→ω в условиях высокого квазигидростатического давления.

Благодарности: Работа выполнена в рамках государственного задания ФАНО России по теме “Структура”, № 01201463331

Ключевые слова: псевдомонокристалл циркония, деформация, высокое квазигидростатическое давление, α↔ω фазовые переходы

Библиография:

  1. Orientation relationship between α-phase and high-pressure ω-phase of pure group IV transition metals / N. Adachi, Y. Todaka, H. Suzukib, M.Umemotoa // Scripta Materialia. – 2015. – Vol. 98. – P. 1–4. – DOI: 10.1016/j.scriptamat.2014.10.029
  2. Fenga Biao, Levitas Valery I. Plastic flows and strain-induced alpha to omega phase transformation in zirconium during compression in a diamond anvil cell: Finite element simulations // Materials Science & Engineering A. – 2017. – Vol. 680. – P. 130–140. – DOI: 10.1016/j.msea.2016.10.082
  3. Srinivasarao B., Zhilyaev A. P., Pérez-Prado M. T. Orientation dependency of the alpha to omega plus beta transformation in commercially pure zirconium by high-pressure torsion // Scripta Mater. – 2011. – Vol. 65, no. 3. – P. 241–244. – DOI: 10.1016/j.scriptamat.2011.04.017
  4. Transmission electron microscopy observations of structural modulation in the phase transition from α-Zr to ω-Zr induced by shear strain / X. Shen, P. F. Yu, Q. Jing, Y. Yao, L. Gu, Y. G. Wang, X. F. Duan, R. C. Yu, R. P. Liu // Scripta Materialia. – 2012. – Vol. 67. – P. 653–656. – DOI: 10.1016/j.scriptamat.2012.07.017
  5. Formation and Evolution of Submicrocrystalline Structure in Pure Iron upon Shear under Pressure / M. V. Degtyarev, L. M. Voronova, T. I. Chashchukhina, V. B. Vykhodets, L. S. Davydova, T. E. Kurennykh, A. M. Patselov, V. P. Pilyugin // The Physics of Metals and Metallography. – 2003. – Vol. 96, no. 6. – P. 642–650.
  6. New station at the 4th beamline of the VEPP-3 storage ring / A. I. Ancharov, A. Yu. Manakov, N. A. Mezentsev, B. P. Tolochko, M. A. Sheromov, V. M. Tsukanov // Nuclear Instruments and Methods in Physics Research Section A. – 2001. – Vol. 470. – P. 80–83. – DOI: 10.1016/S0168-9002(01)01029-4
  7. Egorova L. Yu., Khlebnikova Yu. V., Pilyugin V. P. Influence value of deformation on the evolution of structure of monocrystal zirconium shear pressure // Letters on materials. – 2016. – Vol. 6, no. 3. – P. 237–242. (In Russian). – DOI: 10.22226/2410-3535-2016-3-237-242
  8. Григорович В. К. Металлическая связь и структура металлов. – М. : Наука, 1988. – 296 с.
  9. The influence of phase and substructural evolution during dynamic loading on subsequent mechanical properties of zirconium / E. K. Cerreta, J. P. Escobedo, P. A. Rigg, C. P. Trujillo, D. W. Brown, T. A. Sisneros, B. Clausen, M. F. Lopez, T. Lookman, C. A. Bronkhorst, F. L. Addessio // Acta Materialia. – 2013. – Vol. 61. – P. 7712–7719. – DOI: 10.1016/j.actamat.2013.09.009
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  11. Structure peculiarities of omega-phase arising in titanium and zirconium under highpressures / Y. L. Alshevsky, B. A. Kulnitsky, Y. S. Konyaev, M. P. Usikov // Fizika Metallov i Metallovedenie. – 1984. – Vol. 58, no. 4. – P. 795–803.
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Библиографическая ссылка на статью

Initial Stages in the Evolution of the Structure of a Zirconium Pseudo-Single Crystal During Shear Deformation under Pressure / L. Yu. Egorova, Yu. V. Khlebnikova, V. P. Pilyugin, E. G. Chernyshev // Diagnostics, Resource and Mechanics of materials and structures. - 2017. - Iss. 5. - P. 70-79. -
DOI: 10.17804/2410-9908.2017.5.070-079. -
URL: http://dream-journal.org/issues/2017-5/2017-5_146.html
(accessed: 24.07.2024).

 

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