Results 51 to 60 of about 11,238 (308)

Chirped microlens arrays for diode laser circularization and beam expansion

, 2022
Paper ...
Beckert, E., Höfer, B., Dannberg, P., Schreiber, P.   +3 more
core   +1 more source

Manufacturing of Porous Glass by Femtosecond Laser Welding

Micromachines, 2022
Based on femtosecond laser glass welding, four different porous structures of welding spots were formed by the manufacturing processes of spatiotemporal beam shaping and alternating high repetition rate transformation.
Hua Tan, Jiahui Pan, Xiaojia Zheng, Xiaoquan Fu, Yuxun Zhang, Yanxing Liu, Qiheng Huang   +6 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Laser Powder Bed Fusion of Alumina: Effects of Scanning Strategies on External and Internal Defects

Advanced Engineering Materials, EarlyView.
This study investigates how scanning strategies affect pure alumina in laser powder bed fusion. Linear 45° scanning yields uniform surfaces but high porosity, while the island‐concentric strategy provides higher density with through‐holes favorable for infiltration. Findings highlight pathways toward optimizing defect‐free alumina parts.
Mohamed Abdelmoula, Gökhan Küçüktürk, Duran Kaya, David Grossin, Christophe Tenailleau, Benjamin Duployer, Enrique Juste, Fabrice Petit   +7 more
wiley   +1 more source

Anti-Reflection Nanostructures on Tempered Glass by Dynamic Beam Shaping

Micromachines, 2021
Reflectivity and surface topography of tempered glass were modified without any thermal damage to the surroundings by utilizing 1.7 ps ultrashort pulsed laser on its fundamental wavelength of 1030 nm.
Petr Hauschwitz, Jan Brajer, Danijela Rostohar, Jaromír Kopeček, Tomáš Mocek, Martin Cimrman, Michal Chyla, Martin Smrž   +7 more
doaj   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source

Multispot optics for beam shaping of high-power single-mode and multimode lasers

, 2021
The performance of various laser technologies, such as welding, laser powder bed fusion (LPBF), brazing, cladding, and sheet metal cutting, based on the use of high-power multimode fiber lasers, fiber-coupled solid-state, and diode lasers, can be ...
Takuji Nara, Alexander Laskin, Laskin, Alexander,, Volpp, Joerg,, Nara, Takuji,, Seong Ryol Jung, Joerg Volpp, Vadim Laskin, Jung, Seong Ryol,, Laskin, Vadim,   +9 more
core   +1 more source

Improvement of Laser Beam Fusion Cutting of Mild and Stainless Steel Due to Longitudinal, Linear Beam Oscillation

Applied Sciences, 2020
The latest research on laser beam fusion cutting (LBFC) with static beam shaping have shown a limitation in the quality of cut parts for thick steel plates (> 6 mm) when using solid state lasers.
Cindy Goppold, Thomas Pinder, Susanne Schulze, Patrick Herwig, Andrés Fabián Lasagni   +4 more
doaj   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

High-power fiber lasers for photocathode electron injectors

Physical Review Special Topics. Accelerators and Beams, 2014
Many new applications for electron accelerators require high-brightness, high-average power beams, and most rely on photocathode-based electron injectors as a source of electrons.
Zhi Zhao, Adam Bartnik, Frank W. Wise, Ivan V. Bazarov, Bruce M. Dunham   +4 more
doaj   +1 more source