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).


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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

Item Type: Article
Digital Object Identifier (DOI): doi:10.1063/1.3686540
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
ISSNs: 1551-7616 (print)
Keywords: tantalum, nanocrystal, laser shock
Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 340530
Date :
Date Event
Date Deposited: 25 Jun 2012 11:18
Last Modified: 17 Apr 2017 16:54
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