Results 61 to 70 of about 17,852 (256)
IEEE Photonics JournalThe generation and modulation of vector beams typically require mechanical adjustments of optical components, leading to a complex setup and long manipulation times.
Ruisi Wang +3 more
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Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Passive Beam Shaping via Binary-Coded Apertures
IEEE AccessThis paper presents a coded-aperture reflector design for indoor millimeter-wave (mmWave) coverage enhancement in obstructed or blocked line-of-sight (LoS) settings.
Mohammed E. Eltayeb
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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 +2 more
wiley +1 more source
Results in Physics, 2019 This paper presents a method to control both the shape and polarization of a beam in the far field using a vector Schell-model source. Given a desired far-zone beam shape and polarization, and applying Fourier and statistical optics theory, we derive the
Milo W. Hyde, IV
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Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys
Advanced Engineering Materials, EarlyView.This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa +9 more
wiley +1 more source
High-Impact Polystyrene Structured Light Components for Terahertz Imaging Applications
SensorsTerahertz frequency range imaging has become more and more attractive for a wide range of practical applications; however, further component optimization is still required.
Kasparas Stanaitis +4 more
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Advanced Engineering Materials, EarlyView.This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat +7 more
wiley +1 more source
Journal of Manufacturing and Materials ProcessingLasers with average powers of several kilowatts have become an important tool for industrial applications. Temporal and spatial beam shaping was demonstrated to improve existing and enable novel applications.
Rudolf Weber +7 more
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Longitudinal drift compression and pulse shaping for high-intensity particle beams
Physical Review Special Topics. Accelerators and Beams, 2002 High beam current can be achieved by longitudinally compressing bunched beams. The objective of drift compression is to compress a long beam bunch by imposing an initial longitudinal velocity distribution over the length of the beam in the beam frame ...
Hong Qin, Ronald C. Davidson
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