On the residual yield stress of shocked metals

Chapman, D.J.; Eakins, D.E.; Proud, W.G.; Savinykh, A.S.; Garkushin, G.V.; Razorenov, S.V.; Kanel, G.I.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 сентября 2016 г.

Авторы: Chapman D.J., Eakins D.E., Proud W.G., Savinykh A.S., Garkushin G.V., Razorenov S.V., Kanel G.I.
Журнал: Journal of Physics: Conference Series
Том: 500
Год издания: 2014
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 112015
DOI: 10.1088/1742-6596/500/11/112015
Аннотация: Precise measurement of the free-surface velocity can be a rich source of information on the eects of time and strain on material strength. With this objective, we performed a careful comparative measurement of the free-surface velocity of shock loaded aluminium AD1 and magnesium alloy Ma2 samples of various thicknesses in the range 0.2 mm to 5 mm. We observed the expected decay in the elastic precursor state with increasing sample thickness for both aluminium and magnesium alloy. However, we also observed a small change in the magnitude of hysteresis in the elastic-plastic compression-unloading cycle; where qualitatively the peak free-surface velocity also increased with increasing specimen thickness. Interestingly, the observed change in hysteresis as function of specimen thickness for the Ma2 alloy was relatively smaller than the AD1, in contrast with the larger change in precursor magnitude observed for the magnesium. We propose that softening due to multiplication of dislocations is relatively large in Ma2 and results in a smaller hysteresis in the elastic-plastic cycle.
Добавил в систему: Канель Геннадий Исаакович

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On the residual yield stress of shocked metalsстатья

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