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Energy and mechanical properties predictions in Fe-Ni binary system by ab initio calculations

Journal Article · · Materials Today Communications
 [1];  [2];  [2];  [2]
  1. Florida International Univ. (FIU), Miami, FL (United States); OSTI
  2. Worcester Polytechnic Institute, MA (United States)

Here, the fcc random solid solutions in Fe-Ni binary system were investigated using ab initio calculations. Density functional theory (DFT) was applied along with supercells generated by the Special Quasi-Random Structure (SQS) method to predict the enthalpy of mixing and magnetic and elastic properties. The results were compared with relevant experimental and computational data produced by other groups. The effect of SQS supercell size and relaxation procedure on the predicted properties of the alloys were also studied. Our calculations show that 16-atoms SQS model provides adequate approach to the mixing energy of the alloy. However, calculation of mechanical properties requires larger supercell. Excellent agreement between experimental and calculated elastic properties was found in fcc region of Fe-Ni system.

Research Organization:
Florida International Univ. (FIU), Miami, FL (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy and Carbon Management (FECM); Extreme Science and Engineering Discovery Environment (XSEDE)
Grant/Contract Number:
FE0030585
OSTI ID:
2418147
Alternate ID(s):
OSTI ID: 1880876
Journal Information:
Materials Today Communications, Journal Name: Materials Today Communications Journal Issue: C Vol. 33; ISSN 2352-4928
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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