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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.8
- 수록면
- 2,250 - 2,268 (19page)
- DOI
- 10.1007/s12540-024-01646-4
이용수
초록· 키워드
오류제보하기
Ultrasonic wire welding is considered a method of choice for creating reliable interconnects in electronics industry includingaerospace, batteries and electric vehicles. In this paper, ultrasonic welding tests between EVR252 copper wire and substrateare carried out. Novel pattern morphologies are machined on substrates to explore its influence on mechanical properties ofwelded joint. Patterns are divided into three different categories e.g., original surface, vertical and horizontal shapes. Cracks,microstructure strength and tensile properties of welded joint are studied and its joining mechanism is analysed. Comparedwith the reference substrate (S1), the welded joint performance of the longitudinal patterns (S2, S3, S4) has been improved,among which the longitudinal pattern (S4) has the most significant improvement (+ 15%). Likewise, the performance oftransverse pattern (S5) welded joints is relatively poor (− 16%). The microstructural analysis using SEM has revealed predominantjoint strength on Cu wire surface while maintaining rock-like and compact properties of S4 substrate. Upper sideof wire-harness compactness is frequently observed due to vertical direction of patterns on substrate and also increases thestrength of welded joint. Values of failure load, failure displacement and failure energy absorption were increased by 7.9%,72% and 35% for S2, 6.1%, 75% and 42% for S3 and 15%, 87% and 113% for S4 compared to S1. Failure modes of weldedjoints are mainly characterized into: 1-poor ductility or rupture (no deformation) failure in vertical 3-line pattern joints2-cylindrical deep holes failure in vertical 3-line zigzag pattern joints and 3-bulging effect failure in horizontal 3-line zigzagpattern joints. Point and line scans EDS measurement were performed to investigate weaker and stable trends of differentlocations in welded joints. In S4 substrate, 17.9% carbon content at the position of welded joint was investigated, leadingto content of less oxides and fraction impurities. However, S1 weld zone contains 38.7% carbon content which can weakenwelded joint and reduce durability.
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