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Shock melting and vaporization of metals.The effect of initial porosity on shock induction of melting and vaporization is investigated for Ba, Sr, Li, Fe, Al, U, and Th. For the less compressible of these metals, it is found that for a given strong shock-generation system (explosive in contact, or flyer-plate impact) an optimum initial specific volume exists such that the total entropy production, and hence the amount of metal liquid or vapor, is a maximum. Initial volumes from 1.4 to 2.0 times crystal volumes, depending on the metal sample and shock-inducing system, will result in optimum post-shock entropies.
Document ID
19720046519
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ahrens, T. J.
(California Institute of Technology Pasadena, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
May 1, 1972
Publication Information
Publication: Journal of Applied Physics
Volume: 43
Subject Category
Materials, Metallic
Accession Number
72A30185
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-105
Distribution Limits
Public
Copyright
Other

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