The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F13%3A00398843" target="_blank" >RIV/68081723:_____/13:00398843 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2013.06.018" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2013.06.018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2013.06.018" target="_blank" >10.1016/j.actamat.2013.06.018</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy

Popis výsledku v původním jazyce

An equiatomic CoCrFeMnNi high-entropy alloy, which crystallizes in the face-centered cubic (fcc) crystal structure, was produced by arc melting and drop casting. The drop-cast ingots were homogenized, cold rolled and recrystallized to obtain single-phasemicrostructures with three different grain sizes in the range 4-160 um. Quasi-static tensile tests at an engineering strain rate of 10(-3) s(-1) were then performed at temperatures between 77 and 1073 K. Yield strength, ultimate tensile strength and elongation to fracture all increased with decreasing temperature. During the initial stages of plasticity (up to similar to 2% strain), deformation occurs by planar dislocation glide on the normal fcc slip system, {1 1 1} < 1 1 0 >, at all the temperaturesand grain sizes investigated. At later stages (similar to 20% strain), nanoscale deformation twins were observed after interrupted tests at 77 K. Related work hardening prevents the early onset of necking instability and is a reason for t

Název v anglickém jazyce

The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy

Popis výsledku anglicky

An equiatomic CoCrFeMnNi high-entropy alloy, which crystallizes in the face-centered cubic (fcc) crystal structure, was produced by arc melting and drop casting. The drop-cast ingots were homogenized, cold rolled and recrystallized to obtain single-phasemicrostructures with three different grain sizes in the range 4-160 um. Quasi-static tensile tests at an engineering strain rate of 10(-3) s(-1) were then performed at temperatures between 77 and 1073 K. Yield strength, ultimate tensile strength and elongation to fracture all increased with decreasing temperature. During the initial stages of plasticity (up to similar to 2% strain), deformation occurs by planar dislocation glide on the normal fcc slip system, {1 1 1} < 1 1 0 >, at all the temperaturesand grain sizes investigated. At later stages (similar to 20% strain), nanoscale deformation twins were observed after interrupted tests at 77 K. Related work hardening prevents the early onset of necking instability and is a reason for t

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

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Svazek periodika

61

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

5743-5755

Kód UT WoS článku

000323801500019

EID výsledku v databázi Scopus

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