Detail publikace

Mechanical and Microstructural Characterization of Powder Metallurgy CoCrNi Medium Entropy Alloy

MORAVČÍK, I. ČÍŽEK, J. KOVACOVA, Z. HORNÍK, V. KUBĚNA, I. KITZMANTEL, E. NEJEZCHLEBOVÁ, J. NEUBAUER, E. DLOUHÝ, I.

Originální název

Mechanical and Microstructural Characterization of Powder Metallurgy CoCrNi Medium Entropy Alloy

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The present study is focused on synthesis and mechanical properties characterization of equiatomic CoCrNi medium entropy alloy (MEA). Powder metallurgy processes of mechanical alloying (MA) with subsequent spark plasma sintering (SPS) for bulk alloy densification have been utilized. As opposed to the single-phase alloys of identical composition fabricated via casting routes, the alloy after SPS compaction consisted of a major FCC solid solution phase (94.4%), minor fraction of secondary BCC phase (5.6%, precipitated at the FCC grains boundaries), and negligible amount of oxide inclusions. The alloy exhibited high ultimate tensile strength of 1024 MPa and a elongation to fracture of 26%. Elastic modulus of the alloy reached 222 GPa and the thermal expansion coefficient (CTE) was measured as 17.4×10−6 K−1 The plastic deformation in the alloy is carried out by a combination of dislocation glide and mechanical nano-twinning at room temperature.

Klíčová slova

tensile test; mechanical alloying; plasticity; mechanical characterization; powder metallurgy

Autoři

MORAVČÍK, I.; ČÍŽEK, J.; KOVACOVA, Z.; HORNÍK, V.; KUBĚNA, I.; KITZMANTEL, E.; NEJEZCHLEBOVÁ, J.; NEUBAUER, E.; DLOUHÝ, I.

Vydáno

7. 6. 2017

Nakladatel

Elsevier

Místo

London

ISSN

0921-5093

Periodikum

Materials Science and Engineering A

Ročník

2017

Číslo

701

Stát

Švýcarská konfederace

Strany od

370

Strany do

380

Strany počet

11

URL

https://doi.org/10.1016/j.msea.2017.06.086

BibTex

@article{BUT137640,
  author="Igor {Moravčík} and Jan {Čížek} and Zuzana {Kovacova} and Jitka {Nejezchlebová} and Michael {Kitzmantech} and Erich {Neubauer} and Ivo {Kuběna} and Vít {Horník} and Ivo {Dlouhý}",
  title="Mechanical and Microstructural Characterization of Powder Metallurgy CoCrNi Medium Entropy Alloy",
  journal="Materials Science and Engineering A",
  year="2017",
  volume="2017",
  number="701",
  pages="370--380",
  doi="10.1016/j.msea.2017.06.086",
  issn="0921-5093",
  url="https://doi.org/10.1016/j.msea.2017.06.086"
}

Dokumenty

1-s2.0-S0921509317308535-main.pdf