Results 101 to 110 of about 2,859,854 (215)

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Temperature measurement inside and near the weld pool during laser welding [PDF]

, 1999
The work in this article deals with the measurement of temperature fields inside and near the weld pool during laser welding. The laser source used for this study is a 7.5 kW CO2 laser, and the welded material is a UNS N08904 austenitic stainless steel ...
J. Quesada, S. Lhospitalier, BOURGES, Philippe, LHOSPITALIER, Sylvie, LAMBERTIN, Michel, P. Bourges, QUESADA, Jean, M. Lambertin, A. Bert, BERT, Alexandre   +9 more
core   +1 more source

A Practical Noise2Noise Denoising Pipeline for High‐Throughput Raman Spectroscopy

Advanced Engineering Materials, EarlyView.
A lightweight and reproducible denoising pipeline for high‐throughput Raman spectroscopy is introduced, based on a 1D convolutional autoencoder trained with a Noise2Noise strategy. Using only repeated short‐exposure acquisitions, the method suppresses stochastic noise without reference spectra, enabling reliable spectral reconstruction while preserving
David Martin‐Calle, Cesar Alvarez‐Llamas, Vincent Motto‐Ros, Christophe Dujardin, Jérémie Margueritat, David Rodney   +5 more
wiley   +1 more source

Useful transformations: from ion-laser interactions to master equations [PDF]

, 2008
We show set of transformations which allow to obtain analytic solutions in several quantum-optical problems. We start with the ion-laser (time dependent) interaction, continue with the problem of a slow atom interacting with a quantized field to end with
HECTOR MANUEL MOYA CESSA, JOSE MANUEL VARGAS MARTINEZ   +1 more
core  

Laser plasma acceleration of electrons: Towards the production of monoenergetic beams

, 2005
The interaction of high intensity laser pulses with underdense plasma is investigated experimentally using a range of laser parameters and energetic electron production mechanisms are compared.
Jaroszynski, D.A., A. Gopal, Norreys PA, Norreys, Peter A., Krushelnick, Karl, Mangles SPD, Dangor, AE, Thomas AGR, Thomas, A. G. R., Clark, E., Dangor, A.E., Jaroszynski, D. A., Viskup R, Fritzler, S., Gallacher, J. G., Krushelnick, K, Murphy, C.D., Mangles, SPD, Wei MS, Gopal, Abhijit, Murphy CD, Dangor, Aboobaker E., Thomas, Alexander George Roy, J. Gallacher, Fritzler S, B. Walton, Wei, MS, Walton, B, Krushelnick K, Dangor AE, Mori, W. B., A. G. R. Thomas, W. B. Mori, R. Viskup, Najmudin, Z., Walton, B., E. L. Clark, Jaroszynski DA, Gopal, A, Murphy, C. D., Thomas, AGR, Krushelnick, K., Fritzler, S, A. E. Dangor, P. A. Norreys, Thomas, A.G.R., Mangles, S.P.D, Z. Najmudin, C. D. Murphy, Wei, M., Walton, B.R., Mangles, S.P.D., Mori, WB, Najmudin, Z, Mori, Warren B., Gallacher, J., Viskup, R., Jaroszynski, D., Gallacher J, Gallacher, J.G., Viskup, R, M. S. Wei, Norreys, PA, Najmudin, Zulfikar, Gallacher, J, Jaroszynski, D, Norreys, P. A., D. Jaroszynski, Clark, E. L., Gopal A, Wei, M.S., Clark, EL, S. P. D. Mangles, Najmudin Z, Mori WB, K. Krushelnick, Gopal, A., Mangles, Stuart P. D., Clark EL, Wei, M. S., S. Fritzler, Murphy, CD   +81 more
core   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

Advanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali, Magali Gregoire, Matys Guyard, Tatiana Itina, David Grojo, Pol Sopeña   +5 more
wiley   +1 more source

Self-consistent and precise measurement of time-dependent radiative albedo of gold based on specially symmetrical triple-cavity Hohlraum

Matter and Radiation at Extremes
A self-consistent and precise method to determine the time-dependent radiative albedo, i.e., the ratio of the reemission flux to the incident flux, for an indirect-drive inertial confinement fusion Hohlraum wall material is proposed. A specially designed
Zhiyu Zhang, Yang Zhao, Xiaoying Han, Liling Li, Bo Qing, Lifei Hou, Yulong Li, YuXue Zhang, Huan Zhang, Xiangming Liu, Bo Deng, Gang Xiong, Min Lv, Tuo Zhu, Chengwu Huang, Tianming Song, Yan Zhao, Yingjie Li, Lu Zhang, Xufei Xie, Jiyan Zhang, Jiamin Yang   +21 more
doaj   +1 more source

Machine learning phase control of filled-aperture coherent beam combining: principle and numerical demonstration

High Power Laser Science and Engineering
Machine learning has already shown promising potential in tiled-aperture coherent beam combining (CBC) to achieve versatile advanced applications. By sampling the spatially separated laser array before the combiner and detuning the optical path delays ...
Hongbing Zhou, Rumao Tao, Xi Feng, Haoyu Zhang, Min Li, Xiong Xin, Yuyang Peng, Honghuan Lin, Jianjun Wang, Lixin Yan, Feng Jing   +10 more
doaj   +1 more source

Model‐Guided Design of Paper Membrane Architectures for Controlled Flow and Enhanced Diagnostic Sensitivity

Advanced Engineering Materials, EarlyView.
Geometrical modifications on nitrocellulose membranes can result in observable differences in signal intensity relative to a reference membrane (top and bottom left). Using two reference experiments, we have developed a theoretical model that can reproduce the experimentally observed flow changes and provide information on membrane parameters, e.g ...
Maria Dimaki, Lea Holritz, Winnie E. Svendsen   +2 more
wiley   +1 more source