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Shock consolidation of a rapidly solidified steel powder

Kasiraj, P. and Vreeland, T., Jr. and Schwarz, R. B. and Ahrens, T. J. (1984) Shock consolidation of a rapidly solidified steel powder. Acta Metallurgica, 32 (8). pp. 1235-1241. ISSN 0001-6160. doi:10.1016/0001-6160(84)90130-5.

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Rapidly solidified AISI 9310 steel powders were consolidated by shock waves produced from the impact of high velocity flyers. Dependence of the microhardness and the ultimate tensile strength of the compacts on the initial shock pressure (from 3.6 to 17.9 GPa) and the maximum shock pressure (from 6 to 37 GPa) was measured for an initial powder density 0.6 of the bulk density and a shock duration of 2–3 s. Photomicrographs and SEM fractographs were used to study the interparticle bonding in the compacts. Results show that for initial shock pressures below 4 GPa, the compacts have negligible strength. However, above this threshold the strength of the compact rises rapidly until a maximum value of 1.3 ± 0.1 GPa is reached for an initial shock pressure of 12.4 GPa. The strength then remains constant before decreasing at the highest initial shock pressure. In marked contrast, with increasing shock pressure, the diamond pyramid hardness increases very gradually from a value of about 340 for the powder to about 500 at the highest shock pressure. The maximum strength obtained correlates reasonably well with the strength-expected from microhardness measurements.

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Additional Information:© 1984 Pergamon Press Ltd. Received 29 June 1983; In revised form 4 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. Schwan is partially supported by the U.S. Department of Energy. Contribution NO. 3919. We are grateful to Dan Kostka and Mary Jane Bartholomew for their contributions to the experimental work.
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 Sciences3919
Issue or Number:8
Record Number:CaltechAUTHORS:20141103-104135464
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Official Citation:Kasiraj, P., Vreeland Jr, T., Schwarz, R. B., & Ahrens, T. J. (1984). Shock consolidation of a rapidly solidified steel powder. Acta Metallurgica, 32(8), 1235-1241. doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51172
Deposited By: Joanne McCole
Deposited On:03 Nov 2014 20:22
Last Modified:10 Nov 2021 19:06

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