MECHANICAL PROPERTIES OF HIGH ENTROPY ALLOY TIC REINFORCED IN-SITU COMPOSITE

1 MORAVČÍK Igor
Co-authors:
1 ČÍŽEK Jan 1 DLOUHÝ Ivo
Institution:
1 Institute of Materials Science and Engineering – NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology (BUT), Brno, Czech Republic, EU, moravciktk@gmail.com
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:
1635-1640
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:
10 views / 4 downloads
Abstract

The present work is focused on the synthesis of inequiatomic AlCoCrFeNiTi0.5 high entropy alloy (HEA) with composite structure reinforced by TiC nanoparticles. The initial alloy was prepared by mechanical alloying (MA) in a planetary ball mill, compacted by spark plasma sintering (SPS) and heat treated to obtain better microstructure. Microstructure and mechanical behavior of the SPS-ed compacts prior to and after the heat treatment were investigated. The bulk samples were composed of nano-grained mixture of FCC solid solution, ordered BCC phase and in-situ formed TiC nanoparticles. The high hardness of 803 HV and 564 HV of the alloy in SPS-ed and heat treated state was measured with bending strength of the latter reaching a value of 2 GPa. It was shown that a fabrication of TiC reinforced HEA nanocomposites with excellent mechanical properties can be achieved.

Keywords: High entropy alloy, powder metallurgy, sintering
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