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Laser compression of nanocrystalline tantalum

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, pp. 1387-1390. (doi:10.1063/1.3686540).

Record type: Article


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


Local EPrints ID: 340530
ISSN: 1551-7616
PURE UUID: be0131c8-3599-4791-b680-946d4cfa426c
ORCID for T.G. Langdon: ORCID iD

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Date deposited: 25 Jun 2012 11:18
Last modified: 18 Jul 2017 05:43

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Author: C.-H. Lu
Author: B.R. Maddox
Author: B.A. Remington
Author: E.M. Brigna
Author: M. Kawasaki
Author: T.G. Langdon ORCID iD
Author: H.-G. Park
Author: B. Kad
Author: M.A. Meyers

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