
Accession Number : ADA320691
Title : An Equation of State for Metals.
Descriptive Note : Final rept. 18 Jul5 Aug 96,
Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Personal Author(s) : Segletes, Steven B.
PDF Url : ADA320691
Report Date : NOV 1996
Pagination or Media Count : 68
Abstract : A new analytical equation of state is offered for metals. The form is expressible completely in terms of the maximum lattice vibration frequency, macroscopically expressible as the characteristic temperature, theta, and its derivatives. For one particularly useful special case, the results have been found to match both coldcurve and shockHugoniot data for a variety of metals. The equation is of the Gruneisen variety, in which the Gruneisen parameter is specified as a function of volume only. The equation begins to lose accuracy in the pressure range of one to several megabars, perhaps because of the breakdown of the Gruneisen assumption, whereupon the Gruneisen parameter becomes energy dependent.
Descriptors : *METALS, *EQUATIONS OF STATE, *GRUNEISEN CONSTANT, FREQUENCY, TEMPERATURE, VIBRATION, PARAMETERS, ACCURACY, PRESSURE, LATTICE DYNAMICS, HUGONIOT EQUATIONS.
Subject Categories : Inorganic Chemistry
Properties of Metals and Alloys
Thermodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE