Results 1 to 10 of about 2,117,850 (329)

Ultrafast laser welding of ceramics. [PDF]

Science, 2019
Welding of ceramics is a key missing component in modern manufacturing. Current methods cannot join ceramics in proximity to temperature-sensitive materials like polymers and electronic components.
Aguilar, G, Cuando-Espitia, N, Devia-Cruz, LF, Garay, JE, Kodera, Y, Kodera, Y, Martinez-Torres, P, Penilla, EH, Sellappan, P, Wieg, AT   +9 more
core   +6 more sources

Ultrafast laser welding of silicon [PDF]

Advanced Photonics Research, 2022
While ultrafast laser welding is an appealing technique for bonding transparent workpieces, it is not applicable for joining silicon samples due to nonlinear propagation effects which dramatically diminishes the possible energy deposition at the interface.
Maxime Chambonneau, Qingfeng Li, Markus Blothe, Stree Vithya Arumugam, Stefan Nolte   +4 more
arxiv   +4 more sources

Nanoscale Processing by Adaptive Laser Pulses [PDF]

Phys. Rev. B - Rapid (December 2002), 2002
We theoretically demonstrate that atomically-precise ``nanoscale processing" can be reproducibly performed by adaptive laser pulses. We present the new approach on the controlled welding of crossed carbon nanotubes, giving various metastable junctions of interest. Adaptive laser pulses could be also used in preparation of other hybrid nanostructures.
A.M. Weiner, A.M. Weiner, A.P. Peirce, B.K.A. Ngoi, D. Meshulach, D.B. Geohegan, D.J. Tannor, E.J. Mele, F. Banhart, F.-R. Tsai, G.G. Samsonidze, H.O. Jeschke, J. Hone, J. Hone, J. Sloan, J.A. Roth, L.C. Qin, M. Irie, M. Terrones, M. Terrones, N.G. Chopra, P. Král, P. Nikolaev, P.M. Ajayan, Petr Král, R. Tenne, S. Berber, S. Iijima, T. Brixner, T. Hertel, Y. Zhao, Y.-G. Yoon, Y.H. Lee   +32 more
arxiv   +3 more sources

Fabrication of a microresonator-fiber assembly maintaining a high-quality factor by CO2 laser welding [PDF]

, 2015
We demonstrate fabrication of a microtoroid resonator of a high-quality (high-Q) factor using femtosecond laser three-dimensional (3D) micromachining. A fiber taper is reliably assembled to the microtoroid using CO2 laser welding. Specifically, we achieve a high Q-factor of 2.12*10^6 in the microresonator-fiber assembly by optimizing the contact ...
Cheng, Ya, Fang, Zhiwei, Lin, Jintian, Liu, Zhengming, Qiao, Lingling, Wang, Min, Yao, Jinping   +6 more
arxiv   +3 more sources

Expanded microchannel heat exchanger: design, fabrication and preliminary experimental test [PDF]

Proceedings of the Institution of Mechanical Engineers - Part A: Journal of Power and Energy, 226, 532-544 (2012), 2012
This paper first reviews non-traditional heat exchanger geometry, laser welding, practical issues with microchannel heat exchangers, and high effectiveness heat exchangers. Existing microchannel heat exchangers have low material costs, but high manufacturing costs.
Brandemuehl, Michael J., Denkenberger, David C., Pearce, Joshua M., Zhai, John   +3 more
arxiv   +6 more sources

A Review on Melt-Pool Characteristics in Laser Welding of Metals

Advances in Materials Science and Engineering, 2018
Laser welding of metals involves with formation of a melt-pool and subsequent rapid solidification, resulting in alteration of properties and the microstructure of the welded metal. Understanding and predicting relationships between laser welding process
Behzad Fotovvati, Steven F. Wayne, Gladius Lewis, Ebrahim Asadi   +3 more
doaj   +2 more sources

Development of laser welding of high strength aluminium alloy 2024-T4 with controlled thermal cycle [PDF]

MATEC Web of Conferences, 2020
An innovative process design, to avoid thermal degradation during autogenous fusion welding of high strength AA 2024-T4 alloy, based on laser beam welding, is being developed. A series of instrumented laser welds in 2 mm thick AA 2024-T4 alloys were made
Demirorer Mete, Suder Wojciech, Ganguly Supriyo, Hogg Simon, Naeem Hassam   +4 more
doaj   +1 more source

Microscopic strain localisation in WAAM Ti-6Al-4V during uniaxial tensile loading [PDF]

MATEC Web of Conferences, 2020
Wire Arc-Based Additive manufacturing is a high deposition rate process suitable for building large-scale aerospace components. However, the larger heat source can cause greater microstructural heterogeneity and, in particular, a coarse columnar ß grain ...
Lunt David, Ho Alistair, Davis Alec, Martina Filomeno, Hönnige Jan, Quinta da Fonseca João, Prangnell Phillip   +6 more
doaj   +1 more source

Evaluation of residual stresses in CO2 laser beam welding of SS316L weldments using FEA

Materials Research Express, 2023
Laser welding is used in critical component production when tight tolerances like minimal distortions and residual stresses are required. Laser beam welding offers a lower heat input, a smaller heat affected zone, lower residual stresses, minimum ...
Harinadh Vemanaboina, M. Babu, Inguva Chinmaya Prerana, Edison Gundabattini, Balram Yelamasetti, K. Saxena, K. H. Salem, Muhammad Ijaz Khan, S. M. Eldin, M. Agrawal   +9 more
semanticscholar   +1 more source

Computationally Efficient Models of High Pressure Rolling for Wire Arc Additively Manufactured Components

Applied Sciences, 2021
High pressure multi-layer rolling is an effective method to reduce residual stress and distortion in metallic components built by wire arc additive manufacturing (WAAM).
Valeriy Gornyakov, Yongle Sun, Jialuo Ding, Stewart Williams   +3 more
doaj   +1 more source