Název: EFFECT OF THERMOMECHANICAL TREATMENT ON STRUCTURAL PHENOMENA AND ELECTROCONDUCTIVITY IN COPPER CONDUCTORS
Autoři: Kunčická, Lenka ; Kačor, P. ; Dvořák, Jiří ; Jakůbek, Zdeněk
Typ dokumentu: Příspěvky z konference
Konference/Akce: METAL 2022 - International Conference on Metallurgy and Materials /31./, Brno (CZ), 20220518
Rok: 2022
Jazyk: eng
Edice: METAL-Conference Proceedings
Abstrakt: Despite its relatively high cost, copper is still the most popular electroconductive material. Its electroconductivity can be affected via structure modifications introduced by shear mixing, i.e. deformation processing, and/or thermomechanical treatment. Being an industrially applicable method of intensive plastic deformation, advantageously used to impart shear mixing, rotary swaging is favourable for production of long electroconductive wires. This study is focused on assessment of the effects of thermomechanical treatment on structural phenomena within copper conductors, the treatment consisted of room temperature rotary swaging and subsequent annealing. The results showed that the deformation ratio introduced via swaging was sufficient to impart homogenization of structure as the differences between the grain sizes and texture orientations within the peripheral and axial regions of the conductor were minimal. On the other hand, the swaged and annealed conductor featured slight inhomogeneity between the peripheral and axial regions, especially as regards structure regeneration and the occurrence of twinning, which was more pronounced in the axial region of the thermomechanically processed conductor (the volume fraction of <111> 60 degrees twin boundaries was 60 % within this sample region). Interestingly, the electroconductivity was higher than 100 % IACS (International Annealed Copper Standard) for the swaged conductor, and even increased up to 104.4 % IACS for the annealed conductor due to the structure modifications imparted by the applied heat treatment.
Klíčová slova: Copper; electroconductivity; microstructure; rotary swaging; thermomechanical processing
Zdrojový dokument: 31st International Conference on Metallurgy and Materials, METAL 2022, ISBN 978-80-88365-06-8, ISSN 2694-9296

Instituce: Ústav fyziky materiálů AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0361075

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-668984


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav fyziky materiálů
Konferenční materiály > Příspěvky z konference