Laser compression of nanocrystalline tantalum
Laser compression of nanocrystalline tantalum
Nanocrystalline tantalum was prepared by high pressure torsion from monocrystalline [100] stock, yielding a grain size of 70nm. It was subjected to laser driven compression at energy levels of ~ 350 J to ~ 850 J in the Omega facility (LLE, U. of Rochester) with corresponding pressures as high as ~ 170 GPa. The laser beam created a crater of significant depth (~ 100 µm). Transmission electron microscopy (TEM) revealed dislocations in the grains but no twins in contrast with monocrystalline tantalum. Hardness measurements were conducted and show the same trend as single crystalline tantalum. The grain size was found to increase close to the energy deposition surface due to the thermomechanical excursion
tantalum, nanocrystal, laser shock
1387-1390
Lu, C.-H.
e160e6c9-b93c-404f-87aa-7f33336c88c2
Maddox, B.R.
4489920f-d512-4f18-a72c-affa86764917
Remington, B.A.
2cbfec39-2562-48a1-aba6-92552c1eddff
Brigna, E.M.
4ddc0c24-d056-41ab-99e9-72dac6f4399d
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Park, H.-G.
8972b6a8-51d1-43f7-a174-38da1571e1a2
Kad, B.
c0ce60a1-5bad-44c7-84fa-426c3e0d8b6f
Meyers, M.A.
1c87f689-ba29-4c2b-aa58-da8462a7abc2
2012
Lu, C.-H.
e160e6c9-b93c-404f-87aa-7f33336c88c2
Maddox, B.R.
4489920f-d512-4f18-a72c-affa86764917
Remington, B.A.
2cbfec39-2562-48a1-aba6-92552c1eddff
Brigna, E.M.
4ddc0c24-d056-41ab-99e9-72dac6f4399d
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Park, H.-G.
8972b6a8-51d1-43f7-a174-38da1571e1a2
Kad, B.
c0ce60a1-5bad-44c7-84fa-426c3e0d8b6f
Meyers, M.A.
1c87f689-ba29-4c2b-aa58-da8462a7abc2
Lu, C.-H., Maddox, B.R., Remington, B.A., Brigna, E.M., Kawasaki, M., Langdon, T.G., Park, H.-G., Kad, B. and Meyers, M.A.
(2012)
Laser compression of nanocrystalline tantalum.
AIP Conference Proceedings, 1426, .
(doi:10.1063/1.3686540).
Abstract
Nanocrystalline tantalum was prepared by high pressure torsion from monocrystalline [100] stock, yielding a grain size of 70nm. It was subjected to laser driven compression at energy levels of ~ 350 J to ~ 850 J in the Omega facility (LLE, U. of Rochester) with corresponding pressures as high as ~ 170 GPa. The laser beam created a crater of significant depth (~ 100 µm). Transmission electron microscopy (TEM) revealed dislocations in the grains but no twins in contrast with monocrystalline tantalum. Hardness measurements were conducted and show the same trend as single crystalline tantalum. The grain size was found to increase close to the energy deposition surface due to the thermomechanical excursion
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Published date: 2012
Additional Information:
Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 26 June–1 July 2011, Chicago, Illinois
Keywords:
tantalum, nanocrystal, laser shock
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 340530
URI: http://eprints.soton.ac.uk/id/eprint/340530
ISSN: 1551-7616
PURE UUID: be0131c8-3599-4791-b680-946d4cfa426c
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Date deposited: 25 Jun 2012 11:18
Last modified: 15 Mar 2024 03:13
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Contributors
Author:
C.-H. Lu
Author:
B.R. Maddox
Author:
B.A. Remington
Author:
E.M. Brigna
Author:
M. Kawasaki
Author:
H.-G. Park
Author:
B. Kad
Author:
M.A. Meyers
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