Detail publikace

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

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

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="2019",
  month="december",
  pages="391--397",
  publisher="Elsevier",
  type="journal article in Scopus"
}