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Title: Porosity modeling in a TiNbTaZrMo high-entropy alloy for biomedical applications

Journal Article · · RSC Advances
DOI: https://doi.org/10.1039/d3ra07313k · OSTI ID:2281103
 [1];  [1];  [2];  [3];  [4]; ORCiD logo [1]
  1. Univ. of Missouri, Columbia, MO (United States)
  2. Missouri State University, Springfield, MO (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)

High-entropy alloys (HEAs) have attracted great attention for many biomedical applications. However, the nature of interatomic interactions in this class of complex multicomponent alloys is not fully understood. We report, for the first time, the results of theoretical modeling for porosity in a large biocompatible HEA TiNbTaZrMo using an atomistic supercell of 1024 atoms that provides new insights and understanding. Our results demonstrated the deficiency of using the valence electron count, quantification of large lattice distortion, validation of mechanical properties with available experimental data to reduce Young's modulus. We utilized the novel concepts of the total bond order density (TBOD) and partial bond order density (PBOD) via ab initio quantum mechanical calculations as an effective theoretical means to chart a road map for the rational design of complex multicomponent HEAs for biomedical applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE; US Army Research Office (ARO); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; AC03-76SF00098; W911NF-13–1-0438; W911NF-19–2-0049; DMR–1611180; DMR–1809640; DMR–2226508
OSTI ID:
2281103
Journal Information:
RSC Advances, Vol. 13, Issue 51; ISSN 2046-2069
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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