EFFECT OF CHROMIUM ADDITION ON STRUCTURE AND MICROSTRUCTURE OF HIGH-ENTROPY ALLOYS FROM AL-TI-CO-NI-FE-(CR) SYSTEM

1 GÓRECKI Kamil
Co-authors:
1,2 BAŁA Piotr 1 KOZIEŁ Tomasz 1 PAJOR Krzysztof 2 CIOS Grzegorz 2 KAWAŁKO Jakub
Institutions:
1 AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Department of Physical and Powder Metallurgy, Al. Mickiewicza 30, 30-059 Krakow, Poland, EU, kgorecki@agh.edu.pl
2 AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, Al. Mickiewicza 30, 30-059 Krakow, Poland, EU
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1333-1338
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
16 views / 3 downloads
Abstract

Multi-component alloys containing at least five elements in equimolar or near equimolar ratio are commonly known as High-Entropy Alloys. Despite the complex chemical composition, with the fulfilment of specific thermodynamic parameters, they are characterized by the existence of simple phases. During designing process of such materials VEC (Valance Electron Concentration) parameter is commonly used to predict the crystallographic structure of the alloy. Calculations are based on the percentage of individual elements and the number of each valence electron. Research presents the effect of chromium addition on the structure and microstructure of alloys from Al-Ti-Co-Ni-Fe-(Cr) system. The assumption is, that the addition of chromium will lower the value of the VEC parameter, and will results in the transition from FCC structure to FCC + BCC structure. Such crystallographic change should additionally lead to significant changes in the properties of these alloys, e.g. by hardness increasing.

Keywords: High-Entropy Alloys, VEC parameter, structure, microstructure
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