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Advanced analysis of the properties of solid-wire electric contacts produced by ultrasonic welding and soldering
ID Logar, Andraž (Author), ID Klobčar, Damjan (Author), ID Nagode, Aleš (Author), ID Trdan, Uroš (Author), ID Černivec, Gregor (Author), ID Sharma, Abhay (Author)

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Abstract
The current article presents an advanced analysis of the properties of solid-wire electric contacts produced with ultrasonic welding and soldering. Soldering is generally used to join thin, solid copper wires to produce electrical contacts in small-volume production, as ultrasonic welding does not provide acceptable peel force and tensile strength due to the deformation and thinning of the wires. In this article, ultrasonic welding of thin, solid copper wires using a ring before and after a thermal shock test is discussed and compared with the standard soldering technique. The thermal shock test was carried out in the temperature range from −30 to 150 °C. Half of the samples, for both the joining techniques and the wires, were subjected to the thermal shock test; the other half were not. Investigations included electrical resistance tests, optical and SEM microscopy, XRD, microhardness measurements, peel tests, tensile tests, and fractographic analysis. The electrical resistance test, microscopy, microhardness measurements, and fracture examinations showed no differences between the thermal shock-exposed and the non-exposed samples with the same joining process. In mechanical tests, the ultrasonic joint demonstrated superior strength compared to the soldered joint.

Language:English
Keywords:solid copper wires, ultrasonic welding, soldering, thermal shock test, joint strength, electrical conductivity
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2024
Number of pages:15 str.
Numbering:Vol. 17, iss. 2, [article no.] 334
PID:20.500.12556/RUL-153501 This link opens in a new window
UDC:621.791
ISSN on article:1996-1944
DOI:10.3390/ma17020334 This link opens in a new window
COBISS.SI-ID:180397827 This link opens in a new window
Publication date in RUL:10.01.2024
Views:334
Downloads:30
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:Molecular Diversity Preservation International
ISSN:1996-1944
COBISS.SI-ID:33588485 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:bakrene žice, ultrazvočno varjenje, spajkanje, test termičnega šoka, trdnost spoja, električna prevodnost

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Funder:Other - Other funder or multiple funders
Funding programme:Republic of Slovenia, Bilateral Projects
Project number:BI-TR/22-24-08

Funder:Other - Other funder or multiple funders
Funding programme:CELSA project

Funder:Other - Other funder or multiple funders
Funding programme:EU ERASMUS+ Strategic Partnership Key Action 2
Project number:2021-1-RO01-KA220-VET-000028028
Acronym:DIGIGREEN

Funder:Other - Other funder or multiple funders
Funding programme:EU ERASMUS+ Strategic Partnership Key Action 2
Project number:2023-1-RO01-KA220-HED-000158031
Acronym:ANGIE

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