Detail publikačního výsledku

Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility

MORAVČÍK, I.; HADRABA, H.; LI, L.; DLOUHÝ, I.; RAABE, D.; LI, Z.

Original Title

Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility

English Title

Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility

Type

WoS Article

Original Abstract

We show that interstitial nitrogen doping improves the tensile properties of a CoCrNi alloy. A material with 0.5 at% interstitial nitrogen was compared to a nitrogen-free CoCrNi alloy. The nitrogen-doped variant has a stable, single-phase face-centered cubic (FCC) lattice structure without nitrides, also after different annealing treatments (800–900 °C, 10 and 30 min). The nitrogen caused an increase in yield strength by 24–33% at identical ductility compared to the nitrogen-free material with similar grain size. The strengthening effect of nitrogen was explained in terms of the simultaneous increase of the lattice friction stress and of the Hall-Petch coefficient.

English abstract

We show that interstitial nitrogen doping improves the tensile properties of a CoCrNi alloy. A material with 0.5 at% interstitial nitrogen was compared to a nitrogen-free CoCrNi alloy. The nitrogen-doped variant has a stable, single-phase face-centered cubic (FCC) lattice structure without nitrides, also after different annealing treatments (800–900 °C, 10 and 30 min). The nitrogen caused an increase in yield strength by 24–33% at identical ductility compared to the nitrogen-free material with similar grain size. The strengthening effect of nitrogen was explained in terms of the simultaneous increase of the lattice friction stress and of the Hall-Petch coefficient.

Keywords

Interstitials,Strengthening,Alloying,Tension test,Concentrated solid solution

Key words in English

Interstitials,Strengthening,Alloying,Tension test,Concentrated solid solution

Authors

MORAVČÍK, I.; HADRABA, H.; LI, L.; DLOUHÝ, I.; RAABE, D.; LI, Z.

RIV year

2020

Released

01.03.2020

Publisher

Elsevier

Location

London

ISBN

1359-6462

Periodical

SCRIPTA MATERIALIA

Volume

178

Number

178

State

United States of America

Pages from

391

Pages to

397

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S1359646219307262

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@article{BUT161601,
  author="Igor {Moravčík} and Hynek {Hadraba} and Linlin {Li} and Ivo {Dlouhý} and Dierk {Raabe} and Zhiming {Li}",
  title="Yield strength increase of a CoCrNi medium entropy alloy by interstitial nitrogen doping at maintained ductility",
  journal="SCRIPTA MATERIALIA",
  year="2020",
  volume="178",
  number="178",
  pages="391--397",
  doi="10.1016/j.scriptamat.2019.12.007",
  issn="1359-6462",
  url="https://www.sciencedirect.com/science/article/pii/S1359646219307262"
}

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