Hostname: page-component-89b8bd64d-rbxfs Total loading time: 0 Render date: 2026-05-13T03:10:30.649Z Has data issue: false hasContentIssue false

ESPEI for efficient thermodynamic database development, modification, and uncertainty quantification: application to Cu–Mg

Published online by Cambridge University Press:  04 June 2019

Brandon Bocklund*
Affiliation:
Department of Materials Science & Engineering, Pennsylvania State University, University Park, PA, 16802, USA
Richard Otis
Affiliation:
Engineering and Science Directorate, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
Aleksei Egorov
Affiliation:
ICAMS, Ruhr-University Bochum, Universitätstr. 150, 44801, Bochum, Germany
Abdulmonem Obaied
Affiliation:
ICAMS, Ruhr-University Bochum, Universitätstr. 150, 44801, Bochum, Germany
Irina Roslyakova
Affiliation:
ICAMS, Ruhr-University Bochum, Universitätstr. 150, 44801, Bochum, Germany
Zi-Kui Liu
Affiliation:
Department of Materials Science & Engineering, Pennsylvania State University, University Park, PA, 16802, USA
*
Address all correspondence to Brandon Bocklund <bjb54@psu.edu>
Get access

Abstract

The software package ESPEI has been developed for efficient evaluation of thermodynamic model parameters within the CALPHAD method. ESPEI uses a linear fitting strategy to parameterize Gibbs energy functions of single phases based on their thermochemical data and refines the model parameters using phase equilibrium data through Bayesian parameter estimation within a Markov Chain Monte Carlo machine learning approach. In this paper, the methodologies employed in ESPEI are discussed in detail and demonstrated for the Cu–Mg system down to 0 K using unary descriptions based on segmented regression. The model parameter uncertainties are quantified and propagated to the Gibbs energy functions.

Information

Type
Artificial Intelligence Research Letters
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

Supplementary material: PDF

Bocklund et al. supplementary material

Bocklund et al. supplementary material 1

Download Bocklund et al. supplementary material(PDF)
PDF 2.2 MB