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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

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

ISSN

0921-5093

e-ISSN

1873-4936

Svazek periodika

924

Číslo periodika v rámci svazku

147757

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

001404789100001

EID výsledku v databázi Scopus

2-s2.0-85213883119