Journal Published Online: 19 September 2017
Volume 6, Issue 5

Influence of the Heat Treatment Processes on the Properties of High Entropy Alloys Based on Al-Cr-Fe-Mn-Ni System

CODEN: MPCACD

Abstract

In the present paper, high entropy alloys based on an aluminum-chromium-iron-manganese-nickel (Al-Cr-Fe-Mn-Ni) system were prepared by induction melting and annealed in an inert atmosphere. The resulting samples were analyzed by optical microscopy, scanning electron microscopy, and X-ray diffraction to determine the structural characteristics before and after the heat treatment process. Significant phase transformations and changes in the phase distribution were noticed after the heat treatment process. The results were discussed against the thermodynamic criteria calculations for most promising compositions. Hardness tests were provided for the selected samples to indicate the changes in the mechanical properties between various compositions and between as-cast and annealed samples. Results indicated that the heat treatment process determined a significant hardness increase in one of the studied high entropy alloys.

Author Information

Mitrica, Dumitru
National R&D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, Pantelimon, Romania
Soare, Vasile
National R&D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, Pantelimon, Romania
Constantin, Ionut
National R&D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, Pantelimon, Romania
Burada, Marian
National R&D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, Pantelimon, Romania
Olaru, Mihai T.
National R&D Institute for Nonferrous and Rare Metals, New Materials and Technologies Laboratory, Pantelimon, Romania
Badilita, Viorel
National R&D Institute for Nonferrous and Rare Metals, Physical and Chemical Laboratory, Pantelimon, Romania
Soare, Victoria
National R&D Institute for Nonferrous and Rare Metals, Physical and Chemical Laboratory, Pantelimon, Romania
Stoiciu, Florentin
National R&D Institute for Nonferrous and Rare Metals, Microscopic Characterization Laboratory, Pantelimon, Romania
Popescu, Gabriela
Polytechnic University of Bucharest, Centre for Research and Expertizing of Special Materials, Bucharest, Romania
Carcea, Ioan
Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, Iasi, Romania
Pages: 14
Price: $25.00
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Stock #: MPC20170018
ISSN: 2379-1365
DOI: 10.1520/MPC20170018