Work

Equation of State for Aluminum at High Entropies and Internal Energies in Shock Waves

Year: 2025

Type: article

Abstract: The present theoretical work is devoted to the construction of a model of the equation of state for matter, where the specific volume is used as the thermodynamic potential, and the entropy and the thermal part of the internal energy act as thermodynamic variables. Based on the proposed model, called STEC, calculations were carried out for aluminum in the region of high internal energies and entropies. A comparison of the calculated shock adiabats with the available data from shock-wave experiments indicates that the constructed equation of state describes well the thermodynamic properties of aluminum up to a shock compression pressure of about 1 TPa. The proposed STEC equation-of-state model can be used in numerical simulations of various processes under extreme conditions at high energy densities.

Source: Metals

DOI: 10.3390/met15111189

Authors: Konstantin V. Khishchenko, Kseniya A. Boyarskikh, Liliya R. Obruchkova, Nikolai N. Seredkin

Institution: Joint Institute for High Temperatures

Language: English

Topic: High-Velocity Impact and Material Behavior

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Ministry of Science and Higher Education of the Russian Federation