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A theory for the shock-wave consolidation of powders

Schwarz, R. B. and Kasiraj, P. and Vreeland, T., Jr. and Ahrens, T. J. (1984) A theory for the shock-wave consolidation of powders. Acta Metallurgica, 32 (8). pp. 1243-1252. ISSN 0001-6160. doi:10.1016/0001-6160(84)90131-7.

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A model for the shock consolidation of powders is developed which predicts, for a given powder density, the regimes of shock pressure P and shock duration t_d expected to yield fully densified compacts of near optimum strength. Most of the densification work is assumed deposited near particle boundaries, leading to partial melting. The model gives an upper bound to the amount of melt. The condition that the melt between particles must exceed a critical thickness and must solidify within the duration of the shocked state leads to necessary conditions for P and t_d.These requirements are presented in “maps of shock consolidation,” using normalized parameters. The model predicts that for a shock energy (normalized to that required to heat iron to the melting point) of 0.7, a minimum shock duration of 2μs is required to consolidate 60μm diameter iron-based powder.

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Additional Information:© 1984 Pergamon Press Ltd. Received 29 June 1983; In revised form 6 January 1984. Research supported by United Technologies Research Center and Defense Advanced Projects Agency through the U.S. Army Materials and Mechanics Research Center. R. B. Schwarz is partially supported by the U.S. Department of Energy. Contribution No. 3915.
Funding AgencyGrant Number
United Technologies Research CenterUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
U.S. Army Materials and Mechanics Research CenterUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
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Caltech Division of Geological and Planetary Sciences3915
Issue or Number:8
Record Number:CaltechAUTHORS:20141103-115302418
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Official Citation:Schwarz, R. B., Kasiraj, P., Vreeland Jr, T., & Ahrens, T. J. (1984). A theory for the shock-wave consolidation of powders. Acta Metallurgica, 32(8), 1243-1252. doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51177
Deposited By: Joanne McCole
Deposited On:03 Nov 2014 21:00
Last Modified:10 Nov 2021 19:07

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