Effects of Diode Laser Superposition on Pulsed Laser Welding of Aluminum

Bergmann, J.P.; Bielenin, Martin; Stambke, Martin; Feustel, Thomas; Witzendorff, Philipp von; Hermsdorf, Jörg

doi:10.1016/j.phpro.2013.03.068

Cited by 30 publications

(6 citation statements)

References 5 publications

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“…Thus, diode lasers can span from the infrared to the ultraviolet (UV) regions of the spectrum. Due to their higher efficiency and lower energy density, diode lasers have shown higher consistency in melting and heating zones when compared to Nd:YAG, fibre and CO2 lasers (Bergmann et al, 2013;Zavala-Arredondo et al, 2017). Owing to their optical characteristics, materials can only absorb energy of specific wavelengths.…”

Section: Laser Beammentioning

confidence: 99%

3D printing: Principles and pharmaceutical applications of selective laser sintering

Awad

Fina

Goyanes

et al. 2020

International Journal of Pharmaceutics

252

129

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Pharmaceutical three-dimensional (3D) printing is a modern fabrication process with the potential to create bespoke drug products of virtually any shape and size from a computer-aided design model. Selective laser sintering (SLS) 3D printing combines the benefits of high printing precision and capability, enabling the manufacture of medicines with unique engineering and functional properties. This article reviews the current state-of-the-art in SLS 3D printing, including the main principles underpinning this technology and highlights the diverse selection of materials and essential parameters that influence printing. The technical challenges and processing conditions are also considered in the context of their effects on the printed product.Finally, the pharmaceutical applications of SLS 3D printing are covered, providing an emphasis on the advantages the technology offers to drug product manufacturing and personalised medicine.

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Section: Laser Beammentioning

confidence: 99%

3D printing: Principles and pharmaceutical applications of selective laser sintering

Awad

Fina

Goyanes

et al. 2020

International Journal of Pharmaceutics

252

129

View full text Add to dashboard Cite

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“…특히 스캐너, 광파이버, 센 서류, 광학계, 발진계 등 레이저 성능에 영향을 미치는 모듈의 발전과 함께 Al의 용접 시 문제가 되는 균열 및 기공을 효과적으로 억제하고 용접성을 향상시키는 Fig. 2 Absorption rates of copper, copper alloys, aluminum and steel surfaces at room temperature over the wavelength 5) Journal of Welding and Joining, Epub ahead of print , 고온균열 방지 및 기공 제어를 위해 스캐너를 이 용하여 빔을 공간적으로 모듈레이션(Spatial modulation) 하는 방법 [11][12][13] , Al 소재에 대해 빔 흡수율이 양호한 다이오드 레이저를 동시에 조사하여 예/후열 형 태의 효과를 동시에 얻는 방법 14) 등이 연구되었으며, 최 근에는 이러한 사전 연구결과에 더 나아가 멀티코어 빔 을 적용한 Al 용접 연구 15,16) 를 선보였다. [19][20][21] 나아가 최근에는 파장이 짧아 흡수 율이 비교적 양호한 그린 레이저(532 nm)를 사용하거 나, 22,23) 에너지 밀도가 매우 높은 싱글모드 레이저를 사용하는 방법 24,25) 그리고 예/후열이 가능한 멀티코어 레이저 빔을 적용하는 방법 계면에서의 저항 수치를 직접 비교하는 것보다는, 두 소재와 계면에서 측정된 저항 값을 아래의 관계식에 대 입하여 전기저항계수(k)를 도출함으로써 평가한다 33) .…”

Section: 알루미늄과 구리의 레이저 용접성unclassified

Study on Laser Welding of Dissimilar Materials between Aluminum and Copper (Ⅰ) - Research Trend in Laser Welding Technology and Materials Testing Methods -

Kim¹,

Jeong²,

Yun³

et al. 2022

J Weld Join

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In the rapidly changing automobile market, the important issues in assembling electric vehicles (EVs) can be summarized as weight reduction and battery safety. For the battery manufacturing technology, welding of dissimilar materials is crucial to assure the functionality and reliability of the battery systems installed in the recently developed EVs. This paper discusses research trends in laser welding technology for joining Al and Cu, which is currently applied for the joining process in the battery pack manufacturing. Laser welding of Al/Cu is well known to be very difficult owing to the formation of brittle intermetallic compounds as well as the low absorption rate of laser beam in both Al and Cu. Thus, the energy absorption rate, optimal energy density (beam size), welding heat input, beam modulation, and laser wavelength should be carefully optimized. The quality of dissimilar Al/Cu laser welding has been assessed by evaluating tensile and electrical properties. However, no standardized testing method exists for the laser welded materials. Therefore, standards must be urgently established for the mechanical and electrical evaluation of the laser welded materials. From the tear-down analysis of commercially produced battery modules in domestic EV, the quality of Al/Cu and Cu/Cu laser welds is critically assessed. For future research, the monitoring technology for reliable real-time laser welding should be developed for the mass-production of EV battery systems with better productivity and higher reliability.

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“…The overlap effect should be considered when defining the effective peak power density [5]. Pulsed laser has also many applications in hybrid welding, such as pulse-continuous wave double beam laser welding technology [6], and pulsed laser-arc hybrid welding [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A review on the effect of laser pulse shaping on the microstructure and hot cracking behavior in the welding of alloys

Zhang

Jia

et al. 2021

Optics & Laser Technology

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Effects of Diode Laser Superposition on Pulsed Laser Welding of Aluminum

Cited by 30 publications

References 5 publications

3D printing: Principles and pharmaceutical applications of selective laser sintering

3D printing: Principles and pharmaceutical applications of selective laser sintering

Study on Laser Welding of Dissimilar Materials between Aluminum and Copper (Ⅰ) - Research Trend in Laser Welding Technology and Materials Testing Methods -

A review on the effect of laser pulse shaping on the microstructure and hot cracking behavior in the welding of alloys

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