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논문 기본 정보

자료유형
학술저널
저자정보
Minjung Kang (Korea Institute of Industrial Technology) Kyuhong Lee (Incheon National University)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第38卷 第3號
발행연도
2020.6
수록면
289 - 294 (6page)

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초록· 키워드

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Despite increasing industrial demand, typical fusion welding of aluminum and copper joints remains difficult due to the formation of intermetallic compounds. Therefore, ultrasonic welding, which is a type of solid-state welding, is used for combining aluminum and oxygen-free copper. It has a low dependence on the materials and can secure large bonding joints in a short duration. However, indentations formed due to the vibration and pressure of ultrasonic welding greatly impact joint quality by affecting joint strength and fracture location.
This study investigated the formation of indentations in accordance with welding variables, and proposed a theoretical estimation of fracture strength in ultrasonic welded joints of aluminum and oxygen-free copper. Since the fracture occurred along the indentation boundary in aluminum substrate-which has lower strength than copper-failure strength increased with increasing indentation depth in the copper plate. Average fracture strength was 65% of the tensile strength of base materials due to the stress concentrated around the indentation. Therefore, product design needs to consider base material strength and fracture propagation path before deciding on a safety factor.

목차

Abstract
1. Introduction
2. Experimental Method
3. Experimental results and discussion
4. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2020-581-000842262