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A molecular dynamics study of Fe50-XMXAl50 ternary alloy (M=Ag, Pt, Pd)

Published online by Cambridge University Press:  19 March 2020

C S Mkhonto ,
P E Ngoepe  and
H R Chauke Open the ORCID record for H R Chauke [Opens in a new window]
C S Mkhonto
Affiliation:
Materials Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga, 0727, South Africa
P E Ngoepe
Affiliation:
Materials Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga, 0727, South Africa
H R Chauke*
Affiliation:
Materials Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga, 0727, South Africa
*
*(Email: [email protected])
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Abstract

Iron aluminide intermetallic alloys are of great importance in many industries due to their excellent oxidation resistance, low cost, low density, resistance to corrosion and good ductility at room temperature. However, these alloys suffer limited room temperature ductility above 873 K. In this paper, a molecular dynamics-based LAMMPS-EAM was used to model Fe50-XMXAl doped systems with either Ag, Pt or Pd. The lattice side preferences of the dopant were deduced from their energy landscape, and Fe sub-lattices showed promising properties. It was found that the addition of Ag, Pt and Pd enhances the stability of Fe50-XMXAl composition. More importantly, Ag and Pd doped systems gave comparable transition temperatures to experimental findings of 1273 K and 1073 K, respectively. Their thermodynamic and the mechanical stability trends showed promising properties for industrial applications, displaying stability at a high temperature below 1300 K.

Keywords

alloyelastic propertiesthermodynamicsx-ray diffraction (XRD)
Type
Articles
Information
MRS Advances , Volume 5 , Issue 23-24: African Materials Research Society 2019 , 2020 , pp. 1185 - 1193
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Copyright
Copyright © Materials Research Society 2020

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References

Li, X, Scherf, A, Heilmaier, M and Stein, F, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diff. 39 162-173 (2016).CrossRefGoogle Scholar
Zamanzade, M, Barnoush, A and Motz, C, A Review on the Properties of Iron Aluminide Intermetallics, Crystals 6 1-29 (2016).CrossRefGoogle Scholar
Mkhonto, C S, Chauke, H R and Ngoepe, P E, First-principles Studies of Fe-Al-X (X=Pt, Ru) alloys, J. S. Afr. Inst. Min. Metall. 117 1-6 (2017)CrossRefGoogle Scholar
Couperthwaite, R A, Cornish, L A and Mwamba, L A, Cold-spray Coating of Fe-40 at. % Al alloy with additions of ruthenium, J. S. Afr. Inst. Min. Metall. 116 927-934 (2016).CrossRefGoogle Scholar
Mkhonto, C S, Chauke, H R and Ngoepe, P E, Thermodynamic Stability of doped FeAl-X (X = Pd, Ag, Pt and Ru) systems, Mater. Sci. Eng. 430 1-7 (2018).Google Scholar
Cinca, N, Lima, C R C and Guilemany, J M, An overview of intermetallics research and Application Status of Thermal Spray Coatings, J. Mater. Res. Technol. 2 75-86 (2013).CrossRefGoogle Scholar
Palm, M, Inden, G and Thomas, N, The Fe-A1-Ti System, J. Phase Equilib. 16 209-222 (1995).CrossRefGoogle Scholar
Palm, M and Lacaze, J, Assessment of the Al-Fe-Ti System, Intermetallics 16 1291-1303 (2006).CrossRefGoogle Scholar
Shao, L, Shi, Y, Huang, J and Wu, S, Effect of joining Parametres on Microstructures of Dissimilar Metal joints between Aluminum and galvanized steel, Mater. Des. 66 453-458 (2015).CrossRefGoogle Scholar
Zhou, X W, Johnson, R A and , H N G, Interatomic Potentials Repository, Wadley, Phys. Rev. B 69 144109-144113 (2004).Google Scholar
Monkhorst, H J and Pack, J D, Phys. Rev. B 13 5188-5192 (1976).CrossRefGoogle Scholar
Kresse, G and Furthmüller, J, Efficient Iterative Schemes for ab initio Total-Energy Calculations using a Plane-wave Basis Set, Phys. Rev. B 54 11169-11186 (1996).CrossRefGoogle ScholarPubMed
Liu, Y, Huang, H, Pan, Y, Zhao, G and Liang, Z, Study Corrosion in Biocompitible Metals for implants: A Review, J. Alloy Compd. 597 200-204 (2014).CrossRefGoogle Scholar
Onsage, L, Two Dimensional Model with an Order-Disorder Transition, Phys. Rev. B 65 3-4 (1994).Google Scholar