Stress relaxation in vanadium under shock and shockless dynamic compression

Kanel, G.I.; Razorenov, S.V.; Garkushin, G.V.; Savinykh, A.S.; Zaretsky, E.B.

Авторы: Kanel G.I., Razorenov S.V., Garkushin G.V., Savinykh A.S., Zaretsky E.B.
Журнал: Journal of Applied Physics
Том: 118
Номер: 4
Год издания: 2015
Издательство: AIP Publishing
Местоположение издательства: United States
Первая страница: 045901-1
Последняя страница: 045901-6
DOI: 10.1063/1.4927613
Аннотация: Evolutions of elastic-plastic waves have been recorded in three series of plate impact experiments with annealed vanadium samples under conditions of shockless and combined ramp and shock dynamic compression. The shaping of incident wave profiles was realized using intermediate base plates made of different silicate glasses through which the compression waves were entered into the samples. Measurements of the free surface velocity histories revealed an apparent growth of the Hugoniot Elastic Limit (HEL) with decreasing average rate of compression. The growth was explained by “freezing” of the elastic precursor decay in the area of interaction of the incident and reflected waves. A set of obtained data shows that the current value of the Hugoniot elastic limit and plastic strain rate are rather associated with the rate of the elastic precursor decay than with the local rate of compression. The study has revealed the contributions of dislocation multiplications in elastic waves. It has been shown that independently of the compression history the material arrives at the minimum point between the elastic and plastic waves with the same density of mobile dislocations.
Добавил в систему: Канель Геннадий Исаакович

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Stress relaxation in vanadium under shock and shockless dynamic compressionстатья

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