High Speed Fracture Of Metals Studied By Cinematographic, Magnetic And Radiographic Methods.

F. Olive; J. Marilleau; R. Loichot; C. Peyre; A. Nicaud

doi:10.1117/12.957702

27 July 1979 High Speed Fracture Of Metals Studied By Cinematographic, Magnetic And Radiographic Methods.

F. Olive, J. Marilleau, R. Loichot, C. Peyre, A. Nicaud

Proceedings Volume 0189, 13th Intl Congress on High Speed Photography and Photonics; (1979) https://doi.org/10.1117/12.957702
Event: 13th International Congress on High Speed Photography and Photonics, 1978, Tokyo, Japan

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.

Citation Download Citation

F. Olive, J. Marilleau, R. Loichot, C. Peyre, and A. Nicaud "High Speed Fracture Of Metals Studied By Cinematographic, Magnetic And Radiographic Methods.", Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); https://doi.org/10.1117/12.957702

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