Results 51 to 60 of about 7,481 (251)

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

A Multiscale and Multiphysics Framework for Laser Beam Welding with Dynamic Beam Shaping

Recent advances in dynamic beam shaping offer transformative potential for laser welding yet understanding of the process’s spatial and temporal response remains limited. This study employs a multi-kW continuous-wave laser with a coherent beam combiner and optical phased array to modulate fluence distribution at microsecond scales.
Bakhtari, Reshad, Jabbar, Sharhid, Kotadia, Hiren R., Franciosa, Pasquale   +3 more
openaire   +3 more sources

Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology

Advanced Engineering Materials, EarlyView.
We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham, Chenyu Wen, Mohammad Hadi Khaksaran, Won‐Yong Lee, Javier Cruz, Klas Hjort, Dongping Wu, Shi‐Li Zhang   +7 more
wiley   +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

Material dependent influence of ring/spot beam profiles in laser powder bed fusion

Additive Manufacturing Letters
In recent years, the topic of beam shaping for improved laser material processing has rapidly grown influencing metal laser powder bed fusion (PBF-LB/M).
Lova Chechik, Karen Schwarzkopf, Richard Rothfelder, Jonas Grünewald, Michael Schmidt   +4 more
doaj   +1 more source

Prediction of Surface Topography Parameters in Direct Laser Interference Patterning of Stainless Steel Using Infrared Monitoring and Convolutional Neural Networks

Advanced Engineering Materials, EarlyView.
This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky, Marcelo Sallese, Leander Kläber, Clemens Kuhn, Keming Du, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Atomic disorder and thermal stability in laser beam-shape-tailored 3D-Printed Zr-based bulk metallic glass under in-situ heating during high-energy X-ray diffraction

Materials Today Advances
This study demonstrates that tailoring the laser beam intensity profile in laser powder-bed fusion (LPBF) significantly influences the thermal and mechanical behavior of Zr-based bulk metallic glasses (BMGs).
Sepide Hadibeik, Hossein Ghasemi-Tabasi, Lukas Schretter, Emanuel Gingl, Miguel B. Costa, Andreas Burn, Christoph Gammer, A. Lindsay Greer, Florian Spieckermann, Jürgen Eckert   +9 more
doaj   +1 more source

Ultrafast beam pattern modulation by superposition of chirped optical vortex pulses

Scientific Reports, 2022
As an extension of pulse shaping techniques using the space–time coupling of ultrashort pulses or chirped pulses, we demonstrated the ultrafast beam pattern modulation by the superposition of chirped optical vortex pulses with orthogonal spatial modes ...
Asami Honda, Keisaku Yamane, Kohei Iwasa, Kazuhiko Oka, Yasunori Toda, Ryuji Morita   +5 more
doaj   +1 more source

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source

Structured beam generation and optical trapping of low-index particles using a semi-nonlinear Michelson interferometer

Frontiers in Physics
In this work, we propose a semi-nonlinear Michelson interferometer (SNMI) for controllable laser beam shaping and optical manipulation. By placing a Kerr-type nonlinear medium into one arm of the interferometer, the phase difference between the two arms ...
Mai Nguyet Cong, Bui Xuan Kien
doaj   +1 more source