Structure and Mechanical Properties of Powdered Quasicrystalline Al94Fe3Cr3 Alloy Consolidated by Quasi-Hydrostatic Compression
DOI:
https://doi.org/10.20535/1810-0546.2017.5.100489Keywords:
Quasicrystals, Al–Fe–Cr alloy, Quasi-hydrostatic compression, Pressure, Structure, Phase composition, Mechanical propertiesAbstract
Background. Quasicrystalline Al-based alloys belong to the class of the state-of-the-art metal materials for the application in light engineering constructions, primarily in aviation and the motor transport industry. These materials are commonly made in the form of powders, which is due to the high productivity of powder metallurgy methods. Therefore, the powder consolidation methods are of great importance in the production of products, which is associated with certain difficulties, and consequently, they should be chosen considering not only the quasicrystals’ propensity to brittle fracture but also the metastable nature of the quasicrystalline phases. Certain possibilities in this direction are provided by the quasi-hydrostatic compression method, which can provide a non-trivial combination of strength and ductility properties of materials.
Objective. The aim of the paper is to investigate the effect of high pressure under quasi-hydrostatic compression on the formation of structure, phase composition and mechanical properties of the quasicrystalline Al94Fe3Cr3 alloy.
Methods. 40 μm Al94Fe3Cr3 alloy quasicrystalline powder was fabricated by water-atomisation technique. Consolidation of quasicrystalline powder was performed by quasi-hydrostatic compression technique in high-pressure cells at room temperature at a pressure of 2.5, 4, and 6 hPa. Structure, phase composition and mechanical characteristics of Al94Fe3Cr3 alloy were performed by scanning electron microscopy (SEM), X-ray diffraction andmicromechanical tests.
Results. Using the phase X-ray analysis and SEM, the content of the quasicrystalline icosahedral phase (i-phase) in the Al94Fe3Cr3 alloy structure was completely preserved after its consolidation at different pressures (2.5, 4, and 6 hPa) under quasi-hydrostatic compression at room temperature. Despite the high pressure applied in the consolidation process, the morphology of quasicrystalline phase particles located in the a-Al deformed matrix solid solution remains unchanged. The mechanical properties of the alloy exceed the similar characteristics of the alloy consolidated by warm extrusion.
Conclusions. Consolidation of the Al94Fe3Cr3 alloy powder under quasi-hydrostatic compression allows for the complete conservation of metastable quasicrystalline i-phase particles in the aluminum matrix, which provides the highest values of strength properties together with sufficient ductility for application in the engineering practice.
References
J.M. Dubois, “Properties and applications of quasicrystals and complex metallic alloys”, Chem. Soc. Rev., vol. 41, pp. 6760–6777, 2012. doi: 10.1039/c2cs35110b
A. Garcіa-Escorial et al., “Quasicrystalline Al93Fe3Cr2Ti2 alloys”, Revista de Metalurgia, vol. 51, pp. 24–29, 2015. doi: http://dx.doi.org/10.3989/revmetalm.054
M. Galano et al., “Nanoquasicrystalline Al–Fe–Cr-based alloys with high strength at elevated temperature”, J. Alloys Compd., vol. 495, pp. 372–376, 2010. doi: 10.1016/j.jallcom.2009.10.208
A. Inoue and H. Kimura, “High-strength aluminum alloys containing nanoquasicrystalline particles”, Mater. Sci. Eng., vol. 286, pp. 1–10, 2000. doi: 10.1016/S0921-5093(00)00656-0
H. Kimura et al., “Al–Fe based bulk quasicrystalline alloys with high elevated temperature strength”, J. Mater. Res., vol. 15, pp. 2737–2744, 2000. doi: 10.1557/JMR.2000.0392
M-G. Barthes-Labrouss and J-M. Dubois, “Quasicrystals and complex metallic alloys: Trends for potential applications”, Philos. Mag., vol. 88, pp. 2217–2225, 2008. doi: 10.1080/14786430802023036
D. Shechtman et al., “Metallic phase with long-range orientational order and no translational symmetry”, Phys. Rev. Lett., vol. 53, pp. 1951–1954, 1984. doi: 10.1103/PhysRevLett.53.1951
Yu.V. Milman et al., “High strength aluminum alloys reinforced by nanosize quasicrystalline particles for elevated temperature application”, High Temp. Mater. Processes (London), vol. 25, pp. 19–30, 2006. doi: 10.1515/HTMP.2006.25.1-2.19
M. Galano et al., “Nanoquasicrystalline Al-Fe-Cr-based alloys, Part II: Mechanical properties”, Acta Mater., vol. 57, pp. 5120–5130, 2009. doi: 10.1016/j.actamat.2009.07.009
A. Inoue, “Amorphous, nanoquasicrystalline and nanocrystalline alloys in Al-base systems”, Prog. Mater. Sci., vol. 43, pp. 365–520, 1998. doi: 10.1016/S0079-6425(98)00005-X
L.I. Adeeva and A.L. Borisova, “Quasicrystalline alloys as a new promising material for protective coating”, Fizika i Himiya Tverdogo Tila, no. 3, pp. 454–456, 2002 (in Ukrainian).
C. Zhang et al., “Icosahedral phase in rapidly solidified Al–Fe–Ce alloy”, Mater. Sci. Eng. А., vol. 323, pp. 226–231, 2002. doi: 10.1016/S0921-5093(01)01353-3
J. Gurland and N.M. Parih, Microstructural Aspects of the Fracture of Two-Phase Alloys, vol. 7. New York: Academic Press, Inc., 1972, pp. 841–878.
M.V. Karpets et al., “Features of phase formation in rapidly hardening alloys Al-Fe-Cr in the presence of quasicrystals”, Fizika i Himiya Tverdogo Tila, no. 1, pp. 147–151, 2006 (in Ukrainian).
C. Banjongprasert et al., “Spray forming of Al-Fe-Cr-Ti and Al-Si-Li alloys”, Mater. Sci. Forum., vol. 561-565, pp. 1075–1078, 2007. doi: 10.4028/www.scientific.net/MSF.561-565.1075
J.M. Dubois and A. Pianeli, “Aluminum alloys, substrates coated with these alloys and their applications”, U.S. Patent 5432011, Sept. 8, 1994.
N.O. Domianovi et al., “Method for obtaining powders of aluminum and its alloys”, U.A. Patent 2078427, Apr. 27, 1997 (in Russian).
O.L. Hasanov et al., Methods of Compacting and Consolidating Nanostructured Materials and Products. Tomsk, Russia: Tomsk Polytechnic University Publ., 2008 (in Russian).
A.V. Byakova et al., “Effect of temperature on structure and mechanical properties of nanoquasicrystalline Al96Fe3Cr3 alloy consolidated by hot extrusion”, Metallofizika i Novejshie Tehnologii, no. 7, pp. 833–850, 2015 (in Russian).
J.W. Cahn et al., “Indexing of icosaedral quasiperiodic crystals”, Mater. Res. Soc., vol. 1, pp. 13–26, 1986. doi: 10.1557/JMR.1986.0013
B.A. Galanov et al., “Investigation of the mechanical properties of superhard materials in indentation”, Sverhtverdyie Materialy, no. 3, pp. 23–35, 1999 (in Russian).
O.V. Byakova et al., Theoretical foundations and methods for determining the mechanical properties of materials and coatings when indenting at micro- and macro levels. Kyiv, Ukraine: Garan-Servis, 2010 (in Ukrainian).
Y.V. Milman, “Plasticity characteristic obtained by indentation”, J. Phys. D: Appl. Phys., vol. 41, p. 074013, 2008. doi: 10.1088/0022-3727/41/7/074013
W.C. Oliver and G.M. Pharr, “An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments”, J. Mater. Res., vol. 6, pp. 1564–1583, 1992. doi: 10.1557/JMR.1992.1564
O.V. Byakova et al., “Puasson determining factor method”, U.A. Patent 93248, Jan. 25, 2011 (in Ukrainian).
D. Tabor, The Hardness of Metals. Oxford, UK: Clarendon Press, 1951.
Downloads
Published
Issue
Section
License
Copyright (c) 2017 Igor Sikorsky Kyiv Polytechnic Institute
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work
