Results 161 to 170 of about 170,298 (228)

Femtosecond fiber laser welding of PMMA

SPIE Proceedings, 2015
Femtosecond-pulsed laser welding of transparent materials on a micrometer scale is a versatile tool for the fabrication and assembly of electronic, electromechanical, and especially biomedical micro-devices. In this paper, we report on microwelding of two transparent layers of polymethyl methacrylate (PMMA) with femtosecond laser pulses at 1030 nm in ...
Volpe Annalisa, Di Niso Francesca, Gaudiuso Caterina, De Rosa Andrea, Vázquez Rebeca Martínez, Ancona Antonio, Lugarà Pietro Mario, Osellame Roberto   +7 more
openaire   +2 more sources

Fiber laser welding and suppression of spatters

ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics, 2018
Welding with fiber lasers causes some welding defects due to generation of many spatters. In sight of the production technology, suppression of those is necessary for improving production efficiency and assuring their quality. We tried to suppress the spatters by using beam mode controlled technology and succeed with the stainless steel and the pure ...
Tomomichi Yasuoka, Takashi Kayahara, Toshiaki Sakai, Takashi Shigematsu   +3 more
openaire   +1 more source

Dissimilar unbeveled butt joints of AA6061 to S235 structural steel by means of standard single beam fiber laser welding-brazing

, 2021
The design of parts involving the combination of different materials has gained much attention in recent years as a strategy to achieve weight reduction. Joining of dissimilar materials has become a necessity to produce such parts.
D. Wallerstein, F. Lusquiños, R. Comesaña, J. D. Val, A. Riveiro, A. Badaoui, J. Pou   +6 more
semanticscholar   +1 more source

Review study on remote laser welding with fiber lasers

Journal of Laser Applications, 2013
The appearance of the high-power fiber laser with brilliant beam quality enables a rapid development of remote laser welding (RLW). In this paper, a theoretical study of remote laser welding has been reviewed. As a promising technology, the RLW offers an increased flexibility, high operational speed, and reduced cycle time to process a wide range of ...
Lu, Jinhong, Kujanpää, Veli
openaire   +1 more source

Weld penetration and phenomena in 10 kW fiber laser welding

ICALEO 2007: 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2007
A high-power fiber laser can produce an ultra-high peak power density of MW/mm2 level corresponding to a focused electron beam, and is promising as one of the desirable heat sources for high-speed and deep-penetration welding. This research was undertaken with the objective of obtaining a fundamental knowledge of 10 kW high-power fiber laser welding on
Seiji Katayama, Yousuke Kawahito, Keisuke Kinoshita, Naoyuki Matsumoto, Masami Mizutani   +4 more
openaire   +1 more source

Fundamentals of fiber laser remote welding and deep penetration welding

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Remote/scanner welding and deep penetration welding with a fiber laser of high power and high beam quality is receiving a great attention since the laser can achieve high-speed welding and deep penetraion welding for mass production. However, welding phenomena are not fully understood.
null Seiji Katayama, null Shinpei Oiwa, null Naoki Matsumoto, null Masami Mizutani, null Yosuke Kawahito   +4 more
openaire   +1 more source

Laser welding of fiber array units

Applied Optics
We report the results of fabricating fiber array unit (FAU) connectors using a near IR laser welding process, locking fibers in proper position on planar glass substrates and forming strong glass-to-glass bonds, followed by final assembly using lower coefficient of thermal expansion (CTE) epoxies.
Stephan L, Logunov, Mark A, Quesada, Leonard C, Dabich, John L, Nord   +3 more
openaire   +2 more sources

Mitigation of porosity defects in fiber laser welding under low vacuum

, 2020
Laser welding trials were conducted under low vacuum to reduce porosity defects. The effect of vacuum on the characteristics of porosity was quantitatively evaluated using 3D micro-CT.
M. Jiang, Xiangshan Chen, Yan-bin Chen, W. Tao   +3 more
semanticscholar   +1 more source

Study of molten pool dynamics and porosity formation mechanism in full penetration fiber laser welding of Al-alloy

, 2020
To study molten pool dynamics, root hump formation, periodic keyhole behavior in full penetration laser welding (FPLW) of aluminum alloy, a numerical simulation was carried out, in which volume of fluid (VOF) method and ray-tracing algorithm were adopted.
Ruolin Zhang, Xinhua Tang, Lidong Xu, F. Lu, H. Cui   +4 more
semanticscholar   +1 more source

Microstructure and mechanical properties of CLF-1/316 L steel dissimilar joints welded with fiber laser welding

Journal of Manufacturing Processes, 2020
In this paper, fiber laser butt welding on the dissimilar joint between reduced-activation ferrite/martenstic CLF-1 steel and 316 L stainless steel with a thickness of 10 mm was performed. Furthermore, the mechanical properties, microstructure, and phase
Yilei Shi, Shikai Wu, Hongbin Liao, Xiaoyu Wang   +3 more
semanticscholar   +1 more source