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Title: High-entropy alloys in hexagonal close-packed structure

The microstructures and properties of high-entropy alloys (HEAs) based on the face-centered cubic and body-centered cubic structures have been studied extensively in the literature, but reports on HEAs in the hexagonal close-packed (HCP) structure are very limited. Using an efficient strategy in combining phase diagram inspection, CALPHAD modeling, and ab initio molecular dynamics simulations, a variety of new compositions are suggested that may hold great potentials in forming single-phase HCP HEAs that comprise rare earth elements and transition metals, respectively. Lastly, experimental verification was carried out on CoFeReRu and CoReRuV using X-ray diffraction, scanning electron microscopy, and energy dispersion spectroscopy.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [1]
  1. National Energy Technology Lab. (NETL), Albany, OR (United States)
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Taiyuan Univ. of Technology, Taiyuan (China)
Publication Date:
Report Number(s):
CONTR-PUB-146
Journal ID: ISSN 1073-5623; PII: 3091
Grant/Contract Number:
FE0004000
Type:
Accepted Manuscript
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 47; Journal Issue: 7; Journal ID: ISSN 1073-5623
Publisher:
ASM International
Research Org:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1338297