Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0199191" target="_blank" >RIV/00216305:26210/26:0199191 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0921509324016885?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921509324016885?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.msea.2024.147757" target="_blank" >10.1016/j.msea.2024.147757</a>
Alternative languages
Result language
angličtina
Original language name
Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN
0921-5093
e-ISSN
1873-4936
Volume of the periodical
924
Issue of the periodical within the volume
147757
Country of publishing house
CH - SWITZERLAND
Number of pages
14
Pages from-to
1-14
UT code for WoS article
001404789100001
EID of the result in the Scopus database
2-s2.0-85213883119