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Proceedings Paper

High Speed Fracture Of Metals Studied By Cinematographic, Magnetic And Radiographic Methods.
Author(s): F. Olive; J. Marilleau; R. Loichot; C. Peyre; A. Nicaud
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Paper Abstract

High explosives may be used to obtain strain rates in solids within the 103 to 105 s-1 range. We have employed this technique to study the dynamic rupture behaviour of some materials (such as steels, aluminium, zircaloy, uranium alloy) in spherical and cylindrical expansion. Several experimental methods of observation and measurements are employed simultaneously : high speed streak and framing cinematography, magnetic diagnostic and sometimes flash radiography and recovery of fragments. Our results are in accordance with a fracture criterium, derived from the Tresca plasticity criterium, relating an Equivalent deformation "Er to an equivalent strain rate co. A transition in properties of the dislocations wich become supersonic around 104 s-1 could explain the high deformation rates observed.

Paper Details

Date Published: 27 July 1979
PDF: 7 pages
Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957702
Show Author Affiliations
F. Olive, Centre d'Etudes de Vaujours - Commissariat a l'Energie Atomique (France)
J. Marilleau, Centre d'Etudes de Vaujours - Commissariat a l'Energie Atomique (France)
R. Loichot, Centre d'Etudes de Vaujours - Commissariat a l'Energie Atomique (France)
C. Peyre, Centre d'Etudes de Vaujours - Commissariat a l'Energie Atomique (France)
A. Nicaud, Centre d'Etudes de Vaujours - Commissariat a l'Energie Atomique (France)


Published in SPIE Proceedings Vol. 0189:
13th Intl Congress on High Speed Photography and Photonics
Shin-Ichi Hyodo, Editor(s)

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