A. V. Dobromyslov, E. A. Kozlov, N. I. Taluts
DEFORMATION STRUCTURE OF HIGH-PURITY IRON AFTER EXPLOSIVE LOADING IN SPHERICAL SYSTEMS
DOI: 10.17804/2410-9908.2016.6.069-079 The deformation structure of high-purity iron after loading by spherically converging shock waves is studied by optical metallography, transmission electron microscopy, and microhardness measurements. It is revealed that high-rate plastic deformation of iron proceeds by slip. Shear bands and bands of strain localization along grain boundaries are formed in the course of loading. A mixed structure consisting of dislocation cells and bands is observed at the microlevel. Under realized loading conditions, high-rate plastic deformation of iron proceeds in the ε-phase; therefore twins are not formed. The deformation structure of high-purity iron is compared with the structure of Armco iron formed after similar loading conditions. The found difference is explained by different mobility of dislocations.
Keywords: iron, shock waves, high-rate plastic deformation, structure References:
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А. В. Добромыслов, Е. А. Козлов, Н. И. Талуц
ДЕФОРМАЦИОННАЯ СТРУКТУРА ВЫСОКОЧИСТОГО ЖЕЛЕЗА ПОСЛЕ ВЗРЫВНОГО НАГРУЖЕНИЯ В СФЕРИЧЕСКИХ СИСТЕМАХ
Методами металлографии, просвечивающей электронной микроскопии, а также измерением микротвердости изучена деформационная структура железа высокой чистоты после нагружения сферически сходящимися ударными волнами. Обнаружено, что высокоскоростная пластическая деформация железа осуществляется скольжением. В процессе нагружения происходит локализация деформации, приводящая к образованию полос сдвига, а в глубоких слоях шарового образца ‒ дополнительно полос локализации деформации по границам зерен. На микроуровне формируется смешанная структура, состоящая из ячеистой и полосовой структуры. При реализованных режимах нагружения высокоскоростная пластическая деформация протекает в ε-фазе, поэтому двойники не образуются. Проведено сравнение деформационной структуры высокочистого железа со структурой армко-железа, формирующейся после аналогичных условий нагружения.
Ключевые слова: железо, ударное нагружение, высокоскоростная пластическая деформация, структура Библиография:
- Lan Y., Klaar H. I., Dahl W. Evolution of dislocation structure and deformation behavior of iron at different temperature. Part. I. Strain hardening curves and cellular structure // Metallurgical Transactions A. ‒ 1992. ‒ Vol. 23, iss. 2. ‒ P. 537–544. ‒ DOI: 10.1007/BF02801171.
- Arnold W. Dynamisches Werkstoffverhalten von ArmcoEisen bei Stoßwellenbelastung. - Fortschr.-Ber. VDI Reihe 5 Nr. 247, Düsseldorf, Germany : VDI-Verlag, 1992. ‒ 248 S.
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- Johnson J. N., Rohde R. W. Dynamic deformation twinning in shock-loaded iron // J. Appl. Phys. ‒ 1971. ‒ Vol. 42, no. 11. ‒ P. 4171‒4182.
- The metastability and incompleteness of the alpha-epsilon phase transformation in unalloyed iron loading pulses: Specific features under the effect of threshold of the deformation behavior and structure of armco iron / E. A. Kozlov, I. V. Telichko, D. M. Gorbachev, D. G. Pankratov, A. V. Dobromyslov, N. I. Taluts // The Physics of Metals and Metallography. ‒ 2005. ‒ Vol. 99, no. 3. – P. 300–313.
- Leslie W. C., Hornbogen E., Dieter G. E. The structure of shock-hardened iron before and after annealing // Journal of the Iron and Steel Institute. ‒ 1962. ‒ Vol. 200, part 8. ‒ P. 622‒633.
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- Zukas E. G., Fowler C. M. The behavior of iron and steel under impulsive loading. // Response of metals to high velocity deformation / edited by P. G. Shewmon, V. F. Zackay. - New York : Inter Science Publishers Inc., 1961. - P. 343-369.
- Meyers M. F., Murr L. E. Defect generation in shock-wave deformation // Shock waves and high-strain-rate phenomena in metals /edited by M. A. Meyers, L. E. Murr. ‒ New York : Plenum Press, 1981. ‒ Р. 487–530.
- Dobromyslov A. V., Kozlov E. A., Taluts N. I. High-strain-rate deformation of armko iron induced by spherical and quasi-spherical converging shock waves and the mechanism of the α-ε transformation // The Physics of Metals and Metallography. ‒ 2008. ‒ Vol. 106, no. 5. ‒ P. 531-541. ‒ DOI: 10.1134/S0031918X08110136.
- Deformation resistance and fracture of iron over a wide strain rate range / G. I. Kanel, S. V. Razorenov, G. V. Garkushin, S. I. Ashitkov, P. S. Komarov, M. B. Agranat // Physics of the Solid State. – 2014. – Vol. 56, no. 8. – P. 1569–1573. – DOI: 10.1134/S1063783414080113.
- Influence of the reversible α–ε phase transition and preliminary shock compression on the spall strength of armco iron / G. V. Garkushin, N. S. Naumova, S. A. Atroshenko, S. V. Razorenov // Technical Physics. – 2016. – Vol. 61, no. 1. – P. 84–90. – DOI: 10.1134/S1063784216010102.
- Effect of spherically converging shock waves on deformation and phase behavior of high-purity iron / E. A. Kozlov, A. V. Dobromyslov, N. I. Taluts, Ch. Voltz // The Physics of Metals and Metallography. – 2012. – Vol. 113, no. 10. – P. 1007–1015. – DOI: 10.1134/S0031918X12100055.
- Каменецкая Д. С., Пилецкая И. В., Ширяев В. И. Железо высокой степени чистоты. ‒ M. : Металлургия, 1978. ‒ 248 с.
- Maddin R., Chen N. K. Geometrical aspects of the plastic deformation of metals single crystals // Progress in Metal Physics 5 / edited by B. Chalmers, R. King. ‒ London : Pergamon Press Ltd., 1954. ‒ Vol. 5. ‒ P. 69‒125.
- Influence of hydrostatic pressure upon geometry of slipping in monocrystals of siliceous iron / A. V. Dobromyslov, G. V. Dolgikh, N. I. Taluts, V. T. Shmatov, B. I. Beresnev // Fizika metallov i metallovedenie. ‒ 1982. ‒ Vol. 54, iss. 2. ‒ P. 332-338.
Библиографическая ссылка на статью
Dobromyslov A. V., Kozlov E. A., Taluts N. I. Deformation Structure of High-Purity Iron after Explosive Loading in Spherical Systems // Diagnostics, Resource and Mechanics of materials and structures. -
2016. - Iss. 6. - P. 69-79. - DOI: 10.17804/2410-9908.2016.6.069-079. -
URL: http://dream-journal.org/issues/2016-6/2016-6_110.html (accessed: 21.12.2024).
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