Publication detail

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

journal article in Web of Science

Language

en

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

Released

01.03.2020

Publisher

Elsevier

Location

London

ISBN

1359-6462

Periodical

SCRIPTA MATERIALIA

Year of study

178

Number

178

State

US

Pages from

391

Pages to

397

Pages count

6

URL

Documents

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",
  annote="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.",
  address="Elsevier",
  chapter="161601",
  doi="10.1016/j.scriptamat.2019.12.007",
  howpublished="online",
  institution="Elsevier",
  number="178",
  volume="178",
  year="2020",
  month="march",
  pages="391--397",
  publisher="Elsevier",
  type="journal article in Web of Science"
}