Crossing the limits of electric conductivity of copper by inducing nanotwinning via extreme plastic deformation at cryogenic conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10254192" target="_blank" >RIV/61989100:27360/24:10254192 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001128556300001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001128556300001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2023.113513" target="_blank" >10.1016/j.matchar.2023.113513</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crossing the limits of electric conductivity of copper by inducing nanotwinning via extreme plastic deformation at cryogenic conditions

Popis výsledku v původním jazyce

Cu features excellent electric conductivity, although typically at the expense of favourable mechanical properties. Nevertheless, by optimizing the processing procedure, the mechanical properties can be enhanced while maintaining advantageous electric conductivity, which consequently increases the efficiency of copper wires and leads to their lower weight, as well as lower costs of material and production. The presented study investigates the effects of a thermomechanical manufacturing procedure involving rotary swaging, an industrially applicable intensive plastic deformation method imparting shear mixing and intensive (sub)structure modifications, performed at cryogenic conditions on the microstructures and mechanical and electric properties of Cu conductors. The results showed that the cryogenic swaging resulted in formation of significantly elongated grains with heavily refined cross-sections, which featured the mechanical properties enhanced by almost 200%, and, simultaneously, the electric conductivity of 104.9% IACS (International Annealed Copper Standard). By applying an optimized heat treatment, the electric conductivity even increased to 105.8% IACS, primarily due to structure homogenization and development of twins in the micro, and also nano scales.

Název v anglickém jazyce

Crossing the limits of electric conductivity of copper by inducing nanotwinning via extreme plastic deformation at cryogenic conditions

Popis výsledku anglicky

Cu features excellent electric conductivity, although typically at the expense of favourable mechanical properties. Nevertheless, by optimizing the processing procedure, the mechanical properties can be enhanced while maintaining advantageous electric conductivity, which consequently increases the efficiency of copper wires and leads to their lower weight, as well as lower costs of material and production. The presented study investigates the effects of a thermomechanical manufacturing procedure involving rotary swaging, an industrially applicable intensive plastic deformation method imparting shear mixing and intensive (sub)structure modifications, performed at cryogenic conditions on the microstructures and mechanical and electric properties of Cu conductors. The results showed that the cryogenic swaging resulted in formation of significantly elongated grains with heavily refined cross-sections, which featured the mechanical properties enhanced by almost 200%, and, simultaneously, the electric conductivity of 104.9% IACS (International Annealed Copper Standard). By applying an optimized heat treatment, the electric conductivity even increased to 105.8% IACS, primarily due to structure homogenization and development of twins in the micro, and also nano scales.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/GA22-11949S" target="_blank" >GA22-11949S: Nanodvojčata, funkční vlastnosti řízené intenzivní plastickou deformací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Materials characterization

ISSN

1044-5803

e-ISSN

1873-4189

Svazek periodika

207

Číslo periodika v rámci svazku

207

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

nestránkováno

Kód UT WoS článku

001128556300001

EID výsledku v databázi Scopus

2-s2.0-85178340802