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Title: Interaction models and configurational entropies of binary MoTa and the MoNbTaW high entropy alloy

Journal Article · · Physical Review Materials
 [1]; ORCiD logo [2]
  1. Carnegie Mellon University, Pittsburgh, PA (United States); Carnegie Mellon University
  2. Carnegie Mellon University, Pittsburgh, PA (United States)

We introduce a simplified method to model the interatomic interactions of high entropy alloys based on a lookup table of cluster energies. Furthermore, these interactions are employed in replica exchange Monte Carlo simulations with histogram analysis to obtain thermodynamic properties across a broad temperature range. Kikuchi's cluster variation method entropy formalism is applied to directly calculate entropy from statistics on short- and long-range chemical order, and we discuss the convergence of the entropy as clusters of differing size are included. A high temperature series expansion aids in our understanding of the convergence. Computer codes implementing these methods, and supporting data, are freely available on the internet.

Research Organization:
Carnegie Mellon University, Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0014506
OSTI ID:
1983649
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 6 Vol. 7; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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