|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
Invariability of rate dependences of normalized flow stress in niobium and molybdenum under conditions of shock compressionстатья
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: 20 мая 2017 г.
- Авторы: Zaretsky E.B., Kanel G.I.
- Журнал: Journal of Applied Physics
- Том: 120
- Номер: 10
- Год издания: 2016
- Издательство: AIP Publishing
- Местоположение издательства: United States
- Первая страница: 105901
- DOI: 10.1063/1.4962509
- Аннотация: The evolution of elastic-plastic shock waves has been studied in pure molybdenum and niobium at normal and elevated temperatures over propagation distances ranging from 0.03 to 5mm. The experiments revealed that annealing of the metals substantially increases their Hugoniot elastic limits and, to a lesser degree, their spall strengths. Variations in the resistance of both the metals to fracture in tension with the test temperature can be described as modest. Measuring the decay of the elastic precursor waves with a propagation distance in the two metals has allowed a determining of the relationships between a flow stress and an initial plastic strain rate. It was found that, at the high plastic strain rates, the temperature sensitivity of the transient values of the flow sress is much lower than that at the lower strain rates. The stress-strain rate data normalized on shear moduli of the metals have been approximated by simple functions that, despite substantial differences between the moduli and yield stresses, were found to be virtually identical for the two metals.
- Добавил в систему: Канель Геннадий Исаакович