Study on the Fabrication of Nanocrystalline Copper by Explosive Dynamic Loading

Abstract:

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By the method of severe plastic deformation at high strain rate of coarse-grained copper under explosively dynamic loading, nanocrystalline copper with the average grain size less than 200 nanometer was fabricated. The mechanism of grain-refining was investigated by means of transmission electron microscopy. Finally, the deformation processes were simulated using Ls-Dyna3d finite element program and the effects of the strain, strain rate as well as temperature rise on grain-refining were analysed systematically. The results show that it is feasible to fabricate nanocrystalline copper by explosively dynamic plastic deformation of coarse-grained copper; twin crystal and dislocation are the main mechanism of grain-refining; higher strain and lower temperature rise are beneficial to the grain refining; the distribution of the grain size is not uniform along the loading direction.

Info:

Periodical:

Materials Science Forum (Volumes 667-669)

Edited by:

Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon

Pages:

109-114

DOI:

10.4028/www.scientific.net/MSF.667-669.109

Citation:

J. X. Wang et al., "Study on the Fabrication of Nanocrystalline Copper by Explosive Dynamic Loading", Materials Science Forum, Vols. 667-669, pp. 109-114, 2011

Online since:

December 2010

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$35.00

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