STRUCTURAL CHANGES AND MECHANISM OF CONVERGENCE OF CYLINDRICAL SHELLS MADE OF STAINLESS AUSTENITIC STEEL 12X18N10T UNDER EXPLOSIVE LOADING

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Abstract

Experiments were performed on the convergence of cylindrical shells made of austenitic steel 12H18N10T under the action of an explosion. The initiation of the explosive layer surrounding the shell was carried out from eight points evenly distributed on the cylindrical surface. It was established that the convergence process consists of the division of the shells into similar fragments and their movement toward the shell axis. The study of the microstructure showed that shear bands are formed, which create teeth when they reach the surface. Comparison of the processes of convergence of steel shells and previously studied copper ones showed that there are two different mechanisms of convergence: solid-state and hydrodynamic. The deformation criterion for the onset of instability was determined and the size of the instability region was estimated.

About the authors

Vitaliy Ilyich Zel’dovich

M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences

Author for correspondence.
Email: zeldovich@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia

Irina Vyacheslavovna Khomskaya

M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: khomskaya@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia

Sergey Vladimirovich Balushkin

Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics, Snezhinsk

Email: m.v.nikiforov@vniitf.ru
Russian Federation, Snezhinsk, 456770 Russia

Evgeniy Veniaminovich Shorokhov

Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics

Email: e.v.shorokhov@vniitf.ru
Russian Federation, Snezhinsk, 456770 Russia

Daria Nikolaevna Abdullina

M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: abdullina@imp.uran.ru

научный сотрудник, отдел материаловедения

Russian Federation, Ekaterinburg, 620108 Russia

Anastasia Evgenievna Timonina

M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: timoninaa_10@mail.ru
Russian Federation, Ekaterinburg, 620108 Russia

Alexander Mikhailovich Patselov

M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: patselov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108 Russia

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