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Article Dans Une Revue Journal of Applied Physics Année : 2011

Effects of cryogenic temperature on dynamic fragmentation of laser shock-loaded metal foils

Résumé

Although shock-induced fracture and fragmentation of materials at low temperatures are issues of considerable interest for many applications, such as the protection from hypervelocity impacts in outer space or the ongoing development of high energy laser facilities aiming at inertial confinement fusion, little data can be found on the subject yet. In this paper, laser driven shock experiments are performed on gold and aluminum samples at both ambient and cryogenic (down to about 30 K) temperatures. Complementary techniques including transverse optical shadowgraphy, time-resolved velocity measurements, and post-recovery analyses are combined to assess the effects of target temperature upon the processes of microjetting, spallation, and dynamic punching, which are expected to govern fragments generation and ejection. The results indicate that cryogenic temperature tends to reduce the resistance to tensile and shear stresses, promotes brittle fracture, and leads to slightly higher fragments ejection velocities.
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Dates et versions

hal-01136320 , version 1 (26-03-2015)

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T. de Resseguier, E. Lescoute, D. Loison, J. M. Chevalier, F. Ducasse. Effects of cryogenic temperature on dynamic fragmentation of laser shock-loaded metal foils. Journal of Applied Physics, 2011, 110 (12), pp.123504. ⟨10.1063/1.3670005⟩. ⟨hal-01136320⟩
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