Special features in convergence dynamics of steel shells under their explosive loading. Results of laser-interferometric measurements

Козлов, Е. А.; Brichikov, S. A.; Boyarnikov, D. S.; Kuchko, D. P.; Degtyarev, A. A.

doi:10.1134/s0031918x11040259

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…Spheres made of iron, Steel 3, the quenched 30KhGSA steel (HRC = 35 · · · 40), and the 12Kh18N10T steel 11,12,[18][19][20][21][22] were investigated experimentally and theoretically. The diameters of these spheres were 40, 48, 60, 64, 166, and 184 mm.…”

Section: Materials Samples and Conditions Of Their Explosive Loadingmentioning

confidence: 99%

Cumulation of a spherically converging shock wave in metals and its dependence on elastic-plastic properties, phase transitions, spall and shear fractures

Козлов

Petrovtsev

2015

Int. J. Model. Simul. Sci. Comput.

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Consideration is given to results of experimental and theoretical investigations how alpha-epsilon phase transition in the unalloyed iron and the 30 KhGSA steel and its absence in the austenitic 12Kh18N10T stainless steel influence processes under explosive deformation of spheres made of these materials. Polymorphous transition is shown to significantly effect on: amount of explosion-products energy transferred to a sphere, evolution of the converging-wave structure and its parameters, profiles of stress wave and temperature T (R, t) for some Lagrangian particles along the sphere radius, character of energy cumulation under spherical convergence of waves. Int. J. Model. Simul. Sci. Comput. 2015.06. Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/24/15. For personal use only. 1550001-2 Int. J. Model. Simul. Sci. Comput. 2015.06. Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 08/24/15. For personal use only.

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Section: Materials Samples and Conditions Of Their Explosive Loadingmentioning

confidence: 99%

Cumulation of a spherically converging shock wave in metals and its dependence on elastic-plastic properties, phase transitions, spall and shear fractures

Козлов

Petrovtsev

2015

Int. J. Model. Simul. Sci. Comput.

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“…1). Нагружение оболочек проводилось по 4-му режиму, описанному в работе [7]. Толщи-на 1-й оболочки составляла 2,95 мм, а 2-й -4,04 мм.…”

Section: материал и методикаunclassified

“…Следует отме-тить, что при проведении таких исследований нагружение образцов проводилось плоскими ударными волнами. В работе [7] были изучены особенности динамики схождения высоко-расположенных по радиусу оболочек из аустенитной нержавеющей стали 12Х18Н10Т в сфе-рических взрывных системах. Цель данной работы -исследование деформационной структуры и механизма дефор-мации нержавеющей стали 12Х18Н10Т (режим нагружения 4 [7]), а также особенностей про-текания в них фазового γ → α превращения.…”

Section: Introductionunclassified

An electron-microscopic study of the deformation structure of the 12kh18n10t steel after explosive loading in spherical systems

Добромыслов¹,

Талуц²

2015

DREAM

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Optical metallography, transmission electron microscopy and microhardness measurements are used to investigate the deformed structure of retained shells made of the 12Kh18N10T steel after explosive loading. It has been established that the high-rate plastic deformation of the steel under this loading occurs both by slipping and twinning. It is shown that there is a strong localization of deformation resulted in the formation of rough traces of slip. The high pressure at the shock wave front results in the fact that the critical shear stress in one grain is achieved in several slip systems simultaneously, irrespective of the Schmid factor. Therefore, several nonequivalent systems become active slip systems at once. Microtwins form large clusters in which they mainly belong to one or two systems of twinning. The average thickness of microtwins is ~ 30-40 nm. Polymorphic γ → α transformation has been revealed under explosive loading. The α-phase is observed in the form of fine precipitates. It has been found that the microhardness almost doubles after shock loading, as compared with that of the initial state. Transactions A, 1982, vol. 13, iss. 4, pp. 627-635. DOI: 10.1007/BF02644428. 5. KeywordsMalloy S.A., Gray III G. T., Cady C.M., Rutherford R.W., Hihson R.S. The influence of explosive-driven "taylor-wave" shock prestraining on the structure/property behavior of 304 stainless steel. Metallurgical and Materials Transactions A, 2004, vol. 35, iss. 9, pp. 2617-2624. DOI: 10.1007.Firraro D., Matteis P., Scavino G., Ubertalli G., Ienco M. G., Pellati G., Piccardo P., Pinasco M.R., Stagno E., Montanari R., Tata M.E., Brandimarte G., Petralia S., Mechanical twins in 304 stainless steel after small-charge explosion.

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“…multi-channel laser interferometry [2], ultrasmall-direction gamma-tomography [3], recovery method with the follow-on study of "softly stopped" shells. Investigation methods for recovered shells: integral small-direction gamma-tomography [3], optical and electron (scanning and transmission) microscopy [4].…”

Section: D-explosive Experimentsmentioning

confidence: 99%

2D- and 3D-explosive experiments for verification of spall and shear strength models for some steels

Козлов¹

2012

AIP Conference Proceedings

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The optical-lever method and laser interferometry were used to obtain new data on dynamic behavior of the hardened 30KhGSA steel (HRC 35…40) and the austenitic 12Kh18N10T steel under their explosive loading in 2D-and 3D-experimental setups. Investigation of the recovered wedge samples and the semispherical steel shells with the help of gamma-tomography and scanning electron microscopy elucidated special features in the high-rate deformation, as well as regularities in the evolution of deterministic perturbations. Systematic experimental data are essential for verification and certification of the multiphase equation of state and the modern kinetic strength models of these steels, which are used in the 2D-and 3D-software complexes.

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Special features in convergence dynamics of steel shells under their explosive loading. Results of laser-interferometric measurements

Cited by 8 publications

References 16 publications

Cumulation of a spherically converging shock wave in metals and its dependence on elastic-plastic properties, phase transitions, spall and shear fractures

Cumulation of a spherically converging shock wave in metals and its dependence on elastic-plastic properties, phase transitions, spall and shear fractures

An electron-microscopic study of the deformation structure of the 12kh18n10t steel after explosive loading in spherical systems

2D- and 3D-explosive experiments for verification of spall and shear strength models for some steels

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