Results 31 to 40 of about 59,801 (212)
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 +4 more
doaj +1 more source
A New Scintillator Tile/Fiber Preshower Detector for the CDF Central Calorimeter
, 2004 A detector designed to measure early particle showers has been installed in front of the central CDF calorimeter at the Tevatron. This new preshower detector is based on scintillator tiles coupled to wavelength-shifting fibers read out by multi-anode ...
Artikov, A. +24 more
core +4 more sources
On the Mechanism of the Step Coverage of Blanket Tungsten Chemical Vapor Deposition [PDF]
, 1993 In this study, computer modeling of the contact fill process with chemical vapor deposition, (CVD) of tungsten is usedto show the importance of several details on the quality of the fill process. The effect of surface curvature on the stepcoverage of CVD-
Hasper, A., Schmitz, J.E.J.
core +2 more sources
Online Detection of Keyhole Status in a Laser-MIG Hybrid Welding Process
Metals, 2022 During laser-metal inert gas (MIG) hybrid welding, a large amount of welding status information is generated in droplet transfer, keyhole and molten pool.
Xi’an Fan +3 more
doaj +1 more source
Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]
, 2012 In laser cutting of thick steel sheets, quality difference is observed between cut surfaces obtained with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Golubev V. S. +10 more
core +6 more sources
Laser Spot Micro-Welding of Ultra-Thin Steel Sheet
Micromachines, 2021 This paper reports a mechanism understanding how to reduce the solder joint failure phenomenon in the laser spot micro-welding process of ultra-thin steel sheets. An optimization method to improve solder joint service life is proposed. In this study, the
Quanhong Li +4 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Iron‐based metallic glass alloys exhibit excellent soft‐magnetic properties, and unprecedented geometrical freedom in the design of soft‐magnetic metallic glass components is made possible by additive manufacturing. An efficient workflow for developing parameters for laser‐based powder bed fusion of a Fe‐based metallic glass alloy is presented along ...
Julia Löfstrand +7 more
wiley +1 more source
Plasma Charge Current for Controlling and Monitoring Electron Beam Welding with Beam Oscillation
Sensors, 2012 Electron beam welding (EBW) shows certain problems with the control of focus regime. The electron beam focus can be controlled in electron-beam welding based on the parameters of a secondary signal.
Valeriy Shchavlev +5 more
doaj +1 more source
The Efficacy and Safety of <2 cm Micro-Keyhole Microvascular Decompression for Hemifacial Spasm
Frontiers in Surgery, 2021 Objective: Microvascular decompression (MVD) surgery has been accepted as a minimally invasive surgical modality for the treatment of hemifacial spasm (HFS). However, the size of the bone window does not match the concept of minimally invasive.
Jiashang Huang +7 more
doaj +1 more source
Asymptotic Analysis of Double-Scattering Channels
, 2011 We consider a multiple-input multiple-output (MIMO) multiple access channel (MAC), where the channel between each transmitter and the receiver is modeled by the doubly-scattering channel model.
Couillet, Romain +2 more
core +2 more sources