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Metals 2016, 6(12), 320; doi:10.3390/met6120320

Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates

1
Laboratoire pour l’Utilisation des Lasers Intenes (LULI)–Centre National pour la Recherche Scientifique (CNRS), Ecole Polytechnique, Commissariat à l’Energie Atomique (CEA): Université Paris-Saclay, 91128 Palaiseau CEDEX, France
2
Département de Physique, Université Abdou Moumouni de Niamey, BP. 10662 Niamey, Niger
3
Institut P’. Centre National pour la Recherche Scientifique (CNRS). Ecole Nationale Supérieure de Mécanique et d’Aérotechnique (ENSMA) , Université de Poitiers, 86961 Futuroscope CEDEX, France
4
Sorbonne Université, Université Pierre et Marie Curie, Université Paris 06, Centre National pour la Recherche Scientifique (CNRS), Laboratoire d’Utilisation des Lasers Intenses (LULI), Place Jussieu, 75252 Paris CEDEX 05, France
5
Gesellschaft für Schwerionenforschung, Planck str. 1, Darmstadt 64287, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Patrice Peyre
Received: 14 October 2016 / Revised: 2 December 2016 / Accepted: 8 December 2016 / Published: 18 December 2016
(This article belongs to the Special Issue Laser Shock Processing on Metal)
View Full-Text   |   Download PDF [1503 KB, uploaded 19 December 2016]   |  

Abstract

Efficient laser shock processing of materials requires a good characterization of their dynamic response to pulsed compression, and predictive numerical models to simulate the thermomechanical processes governing this response. Due to the extremely high strain rates involved, the kinetics of these processes should be accounted for. In this paper, we present an experimental investigation of the dynamic behavior of iron under laser driven ramp loading, then we compare the results to the predictions of a constitutive model including viscoplasticity and a thermodynamically consistent description of the bcc to hcp phase transformation expected near 13 GPa. Both processes are shown to affect wave propagation and pressure decay, and the influence of the kinetics of the phase transformation on the velocity records is discussed in details. View Full-Text
Keywords: laser; shock compression; quasi-isentropic compression; iron; phase transition kinetics laser; shock compression; quasi-isentropic compression; iron; phase transition kinetics
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MDPI and ACS Style

Amadou, N.; Brambrink, E.; de Rességuier, T.; Manga, A.O.; Aboubacar, A.; Borm, B.; Molineri, A. Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates. Metals 2016, 6, 320.

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