Publication detail

Characterization of Powder Metallurgy High-Entropy Alloys Prepared by Spark Plasma Sintering

DE ALMEIDA GOUVÊA, L. MORAVČÍK, I. ČÍŽEK, J. KRAJŇÁKOVÁ, P. JAN, V. DLOUHÝ, I.

English title

Characterization of Powder Metallurgy High-Entropy Alloys Prepared by Spark Plasma Sintering

Type

journal article in Web of Science

Language

en

Original abstract

In the present work, the High-Entropy Alloys Al0.2Co1.5CrFeNi1.5Ti, Al1.3Co1.4Cr2.0FeNi4.0Ti4.0 and Al6.0Co1.2Cr2.5FeNi3.5Ti6.0 were produced by Mechanical Alloying and subsequent Spark Plasma Sintering processes to obtain properly densified bulks. The characterization of the materials was accomplished through X-Ray Diffraction, Scanning Electron Microscopy, microhardness and nanoindentation tests to identify and analyze the acquired microstructures’ features, phases formed, morphology and size of the grains and its average hardness. The results indicate that it was possible to obtain alloys presenting high values of hardness and multi-phase microstructures. The effect of the multiple phases on the microstructures was discussed in terms of its influence on the mechanical properties. A satisfying densification level of the materials was achieved with the selected parameters.

English abstract

In the present work, the High-Entropy Alloys Al0.2Co1.5CrFeNi1.5Ti, Al1.3Co1.4Cr2.0FeNi4.0Ti4.0 and Al6.0Co1.2Cr2.5FeNi3.5Ti6.0 were produced by Mechanical Alloying and subsequent Spark Plasma Sintering processes to obtain properly densified bulks. The characterization of the materials was accomplished through X-Ray Diffraction, Scanning Electron Microscopy, microhardness and nanoindentation tests to identify and analyze the acquired microstructures’ features, phases formed, morphology and size of the grains and its average hardness. The results indicate that it was possible to obtain alloys presenting high values of hardness and multi-phase microstructures. The effect of the multiple phases on the microstructures was discussed in terms of its influence on the mechanical properties. A satisfying densification level of the materials was achieved with the selected parameters.

Keywords in English

Multi-principal element alloys, Mechanical Alloying, Spark plasma sintering, Mechanical characterization

Released

26.12.2018

Publisher

Trans Tech Publications

Location

Switzerland

ISSN

0255-5476

Volume

941

Number

1

Pages from–to

1053–1058

Pages count

6

BIBTEX


@article{BUT152080,
  author="Larissa {Moravčíková de Almeida Gouvea} and Igor {Moravčík} and Jan {Čížek} and Petra {Krajňáková} and Vít {Jan} and Ivo {Dlouhý},
  title="Characterization of Powder Metallurgy High-Entropy Alloys Prepared by Spark Plasma Sintering",
  year="2018",
  volume="941",
  number="1",
  month="December",
  pages="1053--1058",
  publisher="Trans Tech Publications ",
  address="Switzerland",
  issn="0255-5476"
}