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CHARACTERIZATION OF EQUIMOLAR HIGH-ENTROPY ALLOY FROM AL-TI-CO-NI-FE SYSTEM

1 GÓRECKI Kamil
Co-authors:
1,2 BAŁA Piotr 2 CIOS Grzegorz 2 TOKARSKI Tomasz 1 KOZIEŁ Tomasz
Institutions:
1 AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Department of Physical & Powder Metallurgy, Krakow, Poland, EU, kgorecki@agh.edu.pl
2 AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, Krakow, Poland, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1206-1209
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
516 views / 146 downloads
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Abstract

In this paper a new high-entropy alloy from Al-Ti-Co-Ni-Fe system was examined. The alloy was synthesized by arc melting process. On the basis of theoretical assumptions, the alloy should obtain BCC structure. To verify theoretical assumptions, the structure was characterized by X-ray diffraction. Additionally, microstructural observations using scanning electron microscopy, equipped with energy dispersive spectroscopy X-ray spectrometer for elements distribution, were carried out. It was observed that examined alloy crystallized in FCC structure with additional unidentified phase. It was stated, that the obtained equimolar high-entropy alloy from Al-Ti-Co-Ni-Fe system has high hardness but is very brittle. During hardness measurements from the tips of the indentation cracks spread. A significant segregation of the elements was also observed.

Keywords: High-entropy alloy, SEM, EDS, hardness, microstructure

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