Results 111 to 120 of about 27,379 (235)

Weld pool and keyhole dynamic analysis based on visual system and neural network during laser keyhole welding

, 2014
In keyhole fiber laser welding processes, the weld pool behavior and keyhole dynamics are essential to determining welding quality. To observe and control the welding process, the accurate extraction of the weld pool boundary as well as the width is ...
Luo, Masiyang
core  

Keyhole Depth Prediction in Laser Deep Penetration Welding of Titanium Alloy Based on Spectral Information

Metals
Laser deep penetration welding has been widely applied in industrial fields. However, keyhole depth during the welding process significantly affects the service performance of final products.
Yunqian Li, Yanfeng Gao, Hao Pan, Donglin Tao, Hua Zhang   +4 more
doaj   +1 more source

Melt flow measurement inside the keyhole during laser welding

, 2011
Laser keyhole welding has been in use for decades, but many of the complex mechanisms which take place within the keyhole remain poorly understood. Thispaper describes a streak image technique based on videos from high speed digital cameras. Itis similar
Powell, John, Kaplan, Alexander, Eriksson, Ingemar   +2 more
core  

Achieving aerospace standard porosity levels when welding thin and thick-section aluminium using fibre-delivered lasers : executive summary [PDF]

Environmental and commercial pressures have forced the aerospace industry to look at alternatives to riveting for the manufacture of aluminium aircraft structures.
Verhaeghe, Ing G.
core  

Melt Flow and Porosity Formation in Pulsed Laser Keyhole Welding

, 2004
Instead of CW (continuous wave) mode, pulsed mode laser welding has been popularly used in industry especially for Nd: YAG lasers. In pulsed mode laser keyhole welding, pores have been frequently observed near the root of the solidified weld.
Tsai, Hai-Lung, Menassa, R., Zhou, Jia, Wang, Pei-Chung   +3 more
core  

The Woman at the Keyhole

, 1990
The title of this book takes as its point of reference those early, primitive films in which mostly men, but occasionally women, peek through keyholes, offering bold demonstrations of the voyeuristic pleasure that has been central to virtually every ...
Mayne, Judith
core   +1 more source

Modeling of the keyhole asymmetry in dissimilar laser welding

, 2020
International audienceAn auto-consistent multiphysical 3D model with strong coupling between Heat Transfer, Navier Stokes and ALE problems is proposed for the description of transient development of the keyhole and the melted zone in laser welding of ...
Jouvard, J.-M, Tomashchuk, I, Duband, M, Sallamand, P   +3 more
core  

Implementation av keyhole metod för dynamisk magnetresonansbildtagning

, 2005
The purpose of this work was to implement a keyhole dynamic imaging method on the Philips Panorama open mid-field and low-field magnetic resonance imaging (MRI) systems.
Ehnholm, Julia
core  

Feasibility of exoscopic keyhole surgery: case series.

Keyhole approaches, performed with the endoscope, microscope, or exoscope, aim to minimize tissue traumatization while maximizing surgical view. The exoscope can provide better ergonomics than the microscope without restricting the space inside of the ...
Rios-Vicil, Christian I, Nájera, Edinson, MD, Jean, Walter C, MD, Piper, Keaton, MD, Sáez-Alegre, Miguel, MD, PhD   +4 more
core  

Numerical Investigation on Thermal Fluid Flow-Induced Porosity During EBW of Aluminum Alloy. [PDF]

Materials (Basel)
Zeng R, Song D, Cui H, Wang T.
europepmc   +1 more source