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INFLUENCE OF SINTERING TEMPERATURE ON MICROSTRUCTURE AND HARDNESS OF ALCOCRFENITI0.5 HIGH ENTROPY ALLOY

1 MORAVČÍK Igor
Co-authors:
1 ČÍŽEK Jan 1 GAVENDOVÁ Petra 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
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:
1210-1215
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:
414 views / 178 downloads
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Abstract

High entropy alloy AlCoCrFeNiTi0.5 was produced by a combination of mechanical alloying (MA) and spark plasma sintering (SPS) processes. In our study we have investigated the effect of four different sintering temperatures (ranging from 1150 to 1300 ºC) on microstructures and phase composition of sintered samples by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and Vickers microhardness tests. In all cases, full density has been achieved. The influence of sintering temperature has been determined to be very small for cases when the powder is in solid state during sintering. For highest sintering temperature of 1300 ºC, partial powder melting took place, significantly decreasing obtained hardness.

Keywords: High entropy alloy, powder metallurgy, sintering

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