Multiphase equation of state for iron

Technical Report · Mon Feb 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6345571· OSTI ID:6345571

Kerley, G I

The PANDA code is used to build a multiphase equation of state (EOS) table for iron. Separate EOS tables were first constructed for each of the individual phases. The phase diagram and multiphase EOS were then determined from the Helmholtz free energies. The model includes four solid phases ([alpha],[gamma], [delta], and [var epsilon]) and a fluid phase (including the liquid, vapor, and supercritical regions). The model gives good agreement with experimental thermophysical data, static compression data, phase boundaries, and shock-wave measurements. Contributions from thermal electronic excitation, computed from a quantum-statistical-mechanical model, were found to be very important. This EOS covers a wide range of densities (0--1000 g/cm[sup 3]) and temperatures (0--1.2[times]10[sup 7] K). It is also applicable to RHA steel. The new EOS is used in hydrocode simulations of plate impact experiments, a nylon ball impact on steel, and the shaped charge perforation of an RHA plate. The new EOS table can be accessed through the SNL-SESAME library as material number 2150.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6345571
• Report Number(s): SAND-93-0027; ON: DE93013956
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON
EQUATIONS OF STATE
PHASE DIAGRAMS
IMPACT SHOCK
P CODES
SHOCK WAVES
STEELS
THERMODYNAMIC PROPERTIES
ALLOYS
COMPUTER CODES
DIAGRAMS
ELEMENTS
EQUATIONS
IRON ALLOYS
IRON BASE ALLOYS
METALS
PHYSICAL PROPERTIES
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies