1National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, PO Box 919-102, Mianyang 6219002School of Science, Wuhan University of Technology, Wuhan 4300703The First Aeronautic Institute of the Air Force, Xinyang 464000
Reshock Response of 2A12 Aluminum Alloy at High Pressures
1National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, PO Box 919-102, Mianyang 6219002School of Science, Wuhan University of Technology, Wuhan 4300703The First Aeronautic Institute of the Air Force, Xinyang 464000
摘要By means of mounting the specimen on a low-impedance buffer, reshock experiments were carried out on a 2A12 aluminum alloy up to shock stresses of 67.6GPa. Reshock wave profiles from the initial shock stresses of 60.9-67.6GPa were measured with a velocity interferometer, and it shows that the 2A12 aluminum alloy characterizes as quasi-elastic response during recompression process. The Lagrange longitudinal velocities along the reloading path from initial shock state were obtained from two shots of experiments, while the bulk velocities at corresponding shock stresses were determined via extrapolating from the public reported unloading plastic sound velocities. Combining the reshock and the release experimental results, the yield strength of 2A12 aluminum alloy at shock stress of 60.9GPa was estimated to be about 1.7GPa.
Abstract：By means of mounting the specimen on a low-impedance buffer, reshock experiments were carried out on a 2A12 aluminum alloy up to shock stresses of 67.6GPa. Reshock wave profiles from the initial shock stresses of 60.9-67.6GPa were measured with a velocity interferometer, and it shows that the 2A12 aluminum alloy characterizes as quasi-elastic response during recompression process. The Lagrange longitudinal velocities along the reloading path from initial shock state were obtained from two shots of experiments, while the bulk velocities at corresponding shock stresses were determined via extrapolating from the public reported unloading plastic sound velocities. Combining the reshock and the release experimental results, the yield strength of 2A12 aluminum alloy at shock stress of 60.9GPa was estimated to be about 1.7GPa.
[1] Asay J R and Chhabildas L C 1981 Shock Wave andHigh-Strain-Rate Phenomena in Metals p 417 [2] Asay J R, Chhabildas L C and Dandekar D P 1980 J.Appl. Phys. 51 4774 [3] Asay J R and Lipkin 1987 J. Appl. Phys. 494242 [4] Aasy J R, Chhabildas L C and Barker L M 1985 SAND-85-2009 [5] Reinhart W D and Chhabildas L C 2003 ShockCompression of Condensed Matter 759 [6] Vogler T J, Reinhart W D and Chhabildas L C 2004 J.Appl.Phys. 95 4173 [7] Vogler T J, Reinhart W D and Chhabildas L C 2006 J.Appl. Phys. 99 023512 [8] Huang H and Asay J R 2005 J. Appl. Phys. 98033524 [9] Yu Y Y et al 2008 J. Appl. Phys. 103 103529 [10] Hu J B, Yu Y Y, Tan H and Dai C D 2005 Chin. Phys.Lett. 22 1265
2009, Vol. 26 
