Pressure effects on thermo-mechanical properties of intermetallic B2-type FeAl alloy

Nguyen Viet Tuyen, Ho Khac Hieu, Nguyen Ba Duc, Tran Thi Hai, Nguyen Thi Hong and Tran Thi Ha ()
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Nguyen Viet Tuyen: Institute of Research and Development, Duy Tan University
Ho Khac Hieu: Institute of Research and Development, Duy Tan University
Nguyen Ba Duc: Tan Trao University
Tran Thi Hai: Hong Duc University
Nguyen Thi Hong: Hong Duc University
Tran Thi Ha: Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang University

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 1, 1-8

Abstract: Abstract The pressure effects on thermo-mechanical properties of B2-type FeAl compound have been investigated based on the moment method in statistical mechanics. We derive analytical expressions of equation-of-state, isothermal bulk modulus and specific heats at constant volume and constant pressure of B2-type iron aluminide intermetallic compound. Numerical calculations for lattice parameter, isothermal bulk modulus, Young’s modulus, shear modulus and specific heat at constant pressure of B2-type Fe-40 at.% Al have been performed up to pressure of 10 GPa. Our research shows that the elastic moduli are linear proportional to pressure and the specific heat at constant pressure diminishes strongly at temperature below 300 K. The present statistical moment method results are compared with available experimental data as well as ab initio calculations when possible to verify the developed theory. This research proposes the potential of the moment method in the investigation of thermo-mechanical properties of materials under pressure. Graphical abstract

Keywords: Statistical; and; Nonlinear; Physics (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1140/epjb/e2019-100477-8

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