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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

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

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

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Volume of the periodical

61

Issue of the periodical within the volume

15

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

5743-5755

UT code for WoS article

000323801500019

EID of the result in the Scopus database

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