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Multiphase mixture model for the shock induced consolidation of metal powders

Author
Berry, R. A.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Williamson, R. L.

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Summary
Recently, shock waves have been used to dynamically consolidate rapidly solidified metal powders. Because of the apparently low bulk temperatures and accompanying high surface temperatures, the plastically deformed particles consolidate to form fully dense monoliths which essentially retain the unique, metastable morphology of the original powder particles. The modeling of consolidation processes is complex and can be approached in several ways. In this discussion we adopt a multiphase mixture model approach, intermediate to those mentioned. We include the gaseous phase in our model because there are indications that it may have non-negligible effects. In powder compaction the solid and gaseous constituents retain their identities. To construct the multiphase model the notions of Truesdell are followed; however, the equations must be modified somewhat to account for the immiscible nature of the mixture. To use a continuum description for such a mixture, a ''material particle'' is identified as a group of several grains of the solid or their gaseous interstitial region. The averaged continuum equations describing the behavior of a ''material particle'' are modified to account, in an approximate way, for the discrete nature of the mixture.
Report Numbers
DE86014912; EGG-M-16885; CONF-850736-65
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC07-76ID01570
OSTI Identifier 5402290
Research organization: EG and G Idaho, Inc., Idaho Falls (USA).
View MARC record | catkey: 47368272