Microsecond duration pressure pulse generator for in situ dynamically loaded SEM fracture studies

Autor:	R. J. Macy, B. H. Fishbine
Rok vydání:	1992
Předmět:	Ballistic pendulum Microsecond Bellows Materials science Forensic engineering Feedthrough Impulse (physics) Composite material Coaxial Instrumentation Atomic and Molecular Physics and Optics Bulkhead (partition) Pulse pressure
Zdroj:	Scanning. 14:169-173
ISSN:	0161-0457
DOI:	10.1002/sca.4950140307
Popis:	We describe a technique to impulse load small cylindrical specimens for in situ, real-time SEM studies of dynamically loaded fracture. Loading is done magnetically with a solenoidal coil of 10 mm length and 1 mm radius. The entire loading assembly fits on the SEM stage; there is no need for shock-isolated bellows apparatus. The only vacuum feedthrough required is an MHV coaxial bulkhead connection. A ballistic pendulum measurement gave a peak compressive pressure of ∼20 MPa, with a pressure pulse width of 1.33 μs. Pressures > 80 MPa can easily be generated. Using this device we have obtained real-time SEM movies of dynamically loaded fracture of rosin.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::19f621811bd944b6d2d7969269392009 https://doi.org/10.1002/sca.4950140307 Zobrazit plný text záznamu