Results 41 to 50 of about 39,508 (311)

Correlation between the spatters and evaporation vapor on the front keyhole wall during fiber laser keyhole welding

Journal of Materials Research and Technology, 2020
Severe spattering is one of the common problems during fiber laser keyhole welding. In this study, the correlation between the spatter formation and laser-induced evaporation vapor on the front keyhole wall (FKW) was studied by changing the welding speed
Gaolei Zhang, Baoqi Zhu, Jianglin Zou, Qiang Wu, Rongshi Xiao   +4 more
doaj   +1 more source

Molecular polarizability anisotropy of liquid water revealed by terahertz-induced transient orientation

Nature Communications, 2018
The intermolecular dynamics of liquid water impact most biological processes. Here, the authors use intense terahertz electromagnetic pulses to generate a transient, out-of-equilibrium state of the water network to show that the molecules become oriented
Peter Zalden, Liwei Song, Xiaojun Wu, Haoyu Huang, Frederike Ahr, Oliver D. Mücke, Joscha Reichert, Michael Thorwart, Pankaj Kr. Mishra, Ralph Welsch, Robin Santra, Franz X. Kärtner, Christian Bressler   +12 more
doaj   +1 more source

High-power sub-picosecond filamentation at 1.03 µm with high repetition rates between 10 and 100 kHz

APL Photonics, 2023
Filamentation has extensively been explored and is well understood at repetition rates
Robin Löscher, Victor Moreno, Dionysis Adamou, Denizhan K. Kesim, Malte C. Schroeder, Matteo Clerici, Jean-Pierre Wolf, Clara J. Saraceno   +7 more
doaj   +1 more source

Generation of 12 nJ Pulse Energy by a Thulium-doped Fiber Mamyshev Oscillator [PDF]

EPJ Web of Conferences, 2022
Schuhbauer B., Adolfs V., Haxsen F., Wienke A., Morgner U., Neumann J., Kracht D.   +6 more
doaj   +1 more source

Laser pressure welding of Al-Li alloy 2198: effect of welding parameters on fusion zone characteristics associated with mechanical properties

High Temperature Materials and Processes, 2020
Al-Li alloy 2198 exhibits good combination of toughness and strength but its application is strongly limited by the poor weldability due to the formation of porosities during fusion-welding.
Zhao Tianbo, Sato Yutaka S., Xiao Rongshi, Huang Ting, Zhang Jingquan   +4 more
doaj   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

Singular Spectrum Analysis for Extracting Low Amplitude Vibrations in Femtosecond Laser Time-of-Flight Distance Measurements

IEEE Photonics Journal, 2021
We utilize singular spectrum analysis (SSA) for post-processing distance measurement data obtained by a dual-comb femtosecond laser rangefinder. Signal denoising technique based on SSA allows detection of low amplitude vibrations from time series of ...
Hui Cao, Youjian Song, Minglie Hu, Chingyue Wang   +3 more
doaj   +1 more source

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source

Measurement of the optical dielectric properties of thin-film materials by ultrafast time-resolved interferometry

Results in Physics, 2020
We report a time-resolved optic interferometry (TROI) that enables to straightway probe the optical properties of traditional and special thin-film materials by feat of a phase delayed-interference between double beams of femtosecond laser synchronously ...
Hai-Ying Song, Peng Wang, Qi-Ni Ge, Ya-Chao Li, Elshaimaa M. Emara, Mei-Rong Lu, Shi-Bing Liu   +6 more
doaj   +1 more source