Results 261 to 270 of about 294,421 (332)

A Study on Laser Beam Oscillating Welding Characteristics for the 5083 Aluminum Alloy: Morphology, Microstructure and Mechanical Properties

Journal of Manufacturing Processes, 2020
Laser beam oscillating welding was used to connect 5083 aluminum alloy sheets. The effect of oscillating parameters on the weld porosity and morphology was investigated. When the oscillating frequency was over 200 Hz and the oscillating diameter was over
Shang-Ping Li, Gao-Yang Mi, Chun-Ming Wang   +2 more
exaly   +2 more sources

Laser Beam Oscillating Welding of 5A06 Aluminum Alloys: Microstructure, Porosity and Mechanical Properties

Optics and Laser Technology, 2019
Three types of laser beam oscillating welding were applied on 5A06 aluminum alloy sheets. The microstructure and mechanical properties of the welded joints were characterized.
Shao Xinyu, Zhi Zeng, Bei Peng
exaly   +2 more sources

Weld Formation Mechanism of Fiber Laser Oscillating Welding of Dissimilar Aluminum Alloys

Journal of Manufacturing Processes, 2020
The development of high power galvanometer provides an opportunity to improve the weld formation of dissimilar aluminum alloys. In this paper, the influence of oscillating frequency and amplitude on weld formation of 6061/2A12 aluminum alloys was studied.
Cong Chen, Yunzhong Xiang, Ming Gao
exaly   +2 more sources

Modeling and numerical study of keyhole-induced porosity formation in laser beam oscillating welding of 5A06 aluminum alloy

, 2021
This paper presents a numerical framework of keyhole-induced porosity formation and methods to suppress porosity in laser beam oscillating welding. Circular and infinity oscillating paths with amplitude of 2 mm and frequencies of 100 Hz and 200 Hz were ...
Wen-Chao Ke, Xian-Zheng Bu, J. P. Oliveira, Wei-Gang Xu, Zhi-Min Wang, Z. Zeng   +5 more
semanticscholar   +1 more source

Study of porosity suppression in oscillating laser-MIG hybrid welding of AA6082 aluminum alloy

, 2021
The AA6082 aluminum alloy was welded by oscillating laser-MIG hybrid welding. By using beam oscillation, the porosity can be effectively suppressed in the range of 100−300 A arc current, especially at low arc current level.
Lei Wang, Yaopei Liu, Chenggang Yang, Ming Gao   +3 more
semanticscholar   +1 more source

Laser welding of ultra-high strength steel with different oscillating modes

Journal of Manufacturing Processes, 2021
To obtain high-quality welded joints with low heat input and high welding efficiency, a laser oscillating mode was proposed for welding D406A ultra-high strength steel (UHSS).
Cong Chen, H. Zhou, Changjiang Wang, Lili Liu, Yu-Hui Zhang, Kecheng Zhang   +5 more
semanticscholar   +1 more source

Hydrodynamic and energy extraction properties of oscillating hydrofoils with a trailing edge flap

Applied Ocean Research, 2021
In order to improve the energy extraction efficiency of the oscillating hydrofoil, this research proposes a model of an oscillating hydrofoil with trailing edge flaps.
Guang-Yong Sun, Yong Wang, Yudong Xie, Penglei Ma, Yubing Zhang   +4 more
semanticscholar   +1 more source

Evolution of Oscillation in a Quadrature Oscillator

2011 24th Internatioal Conference on VLSI Design, 2011
The growth of oscillation in a quadrature oscillator that employs phase shifters in the coupling-path between a pair of LC-loaded negative resistance cores, is analyzed. Such an oscillator is known to have two stable modes of oscillation. Under a noise-initiated startup from an unstable initial condition, quasiharmonic assumption and the Method of ...
Diptendu Ghosh, Ranjit Gharpurey
openaire   +2 more sources