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Title: Multiphase aluminum equations of state via density functional theory

Abstract

We have performed density functional theory (DFT) based calculations for aluminum in extreme conditions of both pressure and temperature, up to five times compressed ambient density, and over 1 000 000 K in temperature. In order to cover such a domain, DFT methods including phonon calculations, quantum molecular dynamics, and orbital-free DFT are employed. Our results are then used to construct a SESAME equation of state for the aluminum 1100 alloy, encompassing the fcc, hcp, and bcc solid phases as well as the liquid regime. We also provide extensive comparison with experiment, and based on this we also provide a slightly modified equation of state for the aluminum 6061 alloy.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1414090
Alternate Identifier(s):
OSTI ID: 1328447
Report Number(s):
LA-UR-16-22318
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1800625
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; aluminum; equation of state; density functional theory

Citation Formats

Sjostrom, Travis, Crockett, Scott, and Rudin, Sven. Multiphase aluminum equations of state via density functional theory. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.144101.
Sjostrom, Travis, Crockett, Scott, & Rudin, Sven. Multiphase aluminum equations of state via density functional theory. United States. doi:10.1103/PhysRevB.94.144101.
Sjostrom, Travis, Crockett, Scott, and Rudin, Sven. Mon . "Multiphase aluminum equations of state via density functional theory". United States. doi:10.1103/PhysRevB.94.144101. https://www.osti.gov/servlets/purl/1414090.
@article{osti_1414090,
title = {Multiphase aluminum equations of state via density functional theory},
author = {Sjostrom, Travis and Crockett, Scott and Rudin, Sven},
abstractNote = {We have performed density functional theory (DFT) based calculations for aluminum in extreme conditions of both pressure and temperature, up to five times compressed ambient density, and over 1 000 000 K in temperature. In order to cover such a domain, DFT methods including phonon calculations, quantum molecular dynamics, and orbital-free DFT are employed. Our results are then used to construct a SESAME equation of state for the aluminum 1100 alloy, encompassing the fcc, hcp, and bcc solid phases as well as the liquid regime. We also provide extensive comparison with experiment, and based on this we also provide a slightly modified equation of state for the aluminum 6061 alloy.},
doi = {10.1103/PhysRevB.94.144101},
journal = {Physical Review B},
number = 14,
volume = 94,
place = {United States},
year = {2016},
month = {10}
}

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Works referenced in this record:

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