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.
Laser compression of nanocrystalline tantalum
AIP Conference Proceedings, 1426, . (doi:10.1063/1.3686540).
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Nanocrystalline tantalum was prepared by high pressure torsion from monocrystalline  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
|Digital Object Identifier (DOI):
||Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 26 June–1 July 2011, Chicago, Illinois
||tantalum, nanocrystal, laser shock
||Engineering Mats & Surface Engineerg Gp
||25 Jun 2012 11:18
||17 Apr 2017 16:54
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