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.
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 in English
Interstitials,Strengthening,Alloying,Tension test,Concentrated solid solution
Released
01.03.2020
Publisher
Elsevier
Location
London
ISSN
1359-6462
Volume
178
Number
178
Pages from–to
391–397
Pages count
6
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",
year="2020",
volume="178",
number="178",
month="March",
pages="391--397",
publisher="Elsevier",
address="London",
issn="1359-6462"
}