Detail publikačního výsledku

Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying

MORAVČÍK, I.; ALFREIDER, M.; WURSTER, S.; SCHRETTER, L.; ZÁDĚRA, A.; PERNICA, V.; ČAMEK, L.; ECKERT, J.; HOHENWARTEN, A.

Originální název

Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying

Anglický název

Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying

Druh

Článek WoS

Originální abstrakt

The mechanical performance and microstructures of a CoCrNi medium-entropy alloy (MEA) and NCoCrNi, alloyed with 0.5 at% N, after high pressure torsion (HPT) and subsequent annealing treatments in a temperature range of 150–1000 ◦C were investigated. The introduction of N results in a reduction of grain size by 40 % and ~10–15 % increased hardness and bending strength after HPT. Both materials showed strain hardening and plasticity after HPT even at these strength levels over 1500 MPa which is induced by the saturated nano-crystalline state. Annealing at intermediate temperatures of 300–500 ◦ C resulted in an additional increase of hardness and strength by ~20–40 %, compared to the HPT deformed state. This effect was ~10 % more pro-nounced in the nitrogen alloyed CoCrNi that also showed better thermal stability. However, the increase in strength after 500 ◦ C annealing was accompanied by a drastic loss of ductility in both materials.

Anglický abstrakt

The mechanical performance and microstructures of a CoCrNi medium-entropy alloy (MEA) and NCoCrNi, alloyed with 0.5 at% N, after high pressure torsion (HPT) and subsequent annealing treatments in a temperature range of 150–1000 ◦C were investigated. The introduction of N results in a reduction of grain size by 40 % and ~10–15 % increased hardness and bending strength after HPT. Both materials showed strain hardening and plasticity after HPT even at these strength levels over 1500 MPa which is induced by the saturated nano-crystalline state. Annealing at intermediate temperatures of 300–500 ◦ C resulted in an additional increase of hardness and strength by ~20–40 %, compared to the HPT deformed state. This effect was ~10 % more pro-nounced in the nitrogen alloyed CoCrNi that also showed better thermal stability. However, the increase in strength after 500 ◦ C annealing was accompanied by a drastic loss of ductility in both materials.

Klíčová slova

Interstitials, High pressure torsion, Medium entropy alloy, severe plastic deformation CoCrNi-alloy microcantilevers

Klíčová slova v angličtině

Interstitials, High pressure torsion, Medium entropy alloy, severe plastic deformation CoCrNi-alloy microcantilevers

Autoři

MORAVČÍK, I.; ALFREIDER, M.; WURSTER, S.; SCHRETTER, L.; ZÁDĚRA, A.; PERNICA, V.; ČAMEK, L.; ECKERT, J.; HOHENWARTEN, A.

Vydáno

05.02.2025

Periodikum

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Svazek

924

Číslo

147757

Stát

Švýcarská konfederace

Strany od

1

Strany do

14

Strany počet

14

URL

https://www.sciencedirect.com/science/article/pii/S0921509324016885?via%3Dihub

BibTex

@article{BUT199191,
  author="MORAVČÍK, I. and ALFREIDER, M. and WURSTER, S. and SCHRETTER, L. and ZÁDĚRA, A. and PERNICA, V. and ČAMEK, L. and ECKERT, J. and HOHENWARTEN, A.",
  title="Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying",
  journal="MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING",
  year="2025",
  volume="924",
  number="147757",
  pages="1--14",
  doi="10.1016/j.msea.2024.147757",
  issn="0921-5093",
  url="https://www.sciencedirect.com/science/article/pii/S0921509324016885?via%3Dihub"
}

Dokumenty

1-s2.0-S0921509324016885-main