The investigation of molten pool dynamic behaviors during the “∞” shaped oscillating laser welding of aluminum alloy

2022 ◽  
Vol 173 ◽  
pp. 107350
Author(s):  
Yuewei Ai ◽  
Long Yu ◽  
Yi Huang ◽  
Xiaoying Liu
Keyword(s):  
Aluminum Alloy ◽  
Laser Welding ◽  
Molten Pool ◽  
Dynamic Behaviors

scholarly journals High-Speed X-Ray Transmission and Numerical Study of Melt Flows inside the Molten Pool during Laser Welding of Aluminum Alloy

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Jin Peng ◽  
Liqun Li ◽  
Shangyang Lin ◽  
Furong Zhang ◽  
Qinglong Pan ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Welding ◽  
Welding Speed ◽  
Molten Pool ◽  
High Speed ◽  
Numerical Study ◽  
Flow Behavior ◽  
Front Wall ◽  
X Ray ◽  
Rear Part

By using the X-ray transmission imaging system, melt flows inside a molten pool were studied during laser welding of aluminum alloy at different welding speeds. Then, the correlation between temperature gradients along the direction of weld penetration and melt flows in the rear part of a molten pool was analyzed by using a three-dimensional numerical method. And the presented model was verified by experimental results. The corresponding investigation was carried out to further study the correlation between temperature gradient and melt flow behavior of the molten pool in the plate heated by preheating temperature. The results indicated that, in the rear part of the molten pool, the maximum flow velocity was located at the bottom of the molten pool. The melt metal in the rear molten pool caused by different welding speeds had significantly different flow trends. As the welding speed increased, the absorbed intensity on the keyhole front wall also increased as well as the recoil pressure that could maintain the keyhole opened. Consequently, the increase of the welding speed was more beneficial to improving the stability of the molten pool.

Laser absorption in high-power fiber laser welding of stainless steel and aluminum alloy

2008 ◽  
Author(s):  
Naoyuki Matsumoto ◽  
Yousuke Kawahito ◽  
Masami Mizutani ◽  
Seiji Katayama
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Laser Welding ◽  
Laser Absorption

Peculiarities of AD33 aluminum alloy hand laser welding

2020 ◽  
Vol 2020 (12) ◽  
pp. 13-17
Author(s):  
Nikolay Proskuryakov ◽  
Uliana Putilova ◽  
Rasul Mamadaliev ◽  
Oleg Teploukhov
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Laser Welding ◽  
Welded Joint ◽  
Comparative Investigation ◽  
Micro Structure ◽  
Joint Quality ◽  
Beam Motion

The comparative investigation results of AD33 aluminum alloy welded joint quality dependence upon changes in a laser beam motion rate for conditions of hand and automatic laser welding are shown. A micro-structure of a welded joint at the hand and automatic laser welding of the AD33 alloy is investigated.

Influence of laser pulse on solidification of molten pool during laser welding of dissimilar Ti-based amorphous alloys

2021 ◽  
Vol 26 (3) ◽  
pp. 264-272
Author(s):  
Minghua Chen ◽  
Dongmin Wei ◽  
Chenbin Li ◽  
Liang Liu ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Welding ◽  
Amorphous Alloys ◽  
Molten Pool

Experiment study and regression analysis of molten pool in laser welding

2018 ◽  
Vol 108 ◽  
pp. 534-541 ◽  
Author(s):  
Ting Lei ◽  
Youmin Rong ◽  
Jiajun Xu ◽  
Yu Huang
Keyword(s):  
Regression Analysis ◽  
Laser Welding ◽  
Molten Pool ◽  
Experiment Study

Segmentation of Molten Pool Infrared Images Using Morphology during High Power Disk Laser Welding

2012 ◽  
Vol 201-202 ◽  
pp. 91-94
Author(s):  
Yan Xi Zhang ◽  
Xiang Dong Gao
Keyword(s):  
Laser Welding ◽  
High Power ◽  
Molten Pool ◽  
Welding Process ◽  
Histogram Equalization ◽  
Welding Quality ◽  
Infrared Images ◽  
Traditional Methods ◽  
Disk Laser ◽  
Laser Welding Process

Configuration of a molten pool is related to the laser welding quality. Analyzing the configuration of a molten pool is important to monitor the laser welding process. This paper proposes a method of segmentation of a molten pool and its shadow during high power disk laser welding, consequently provides the groundwork for reconstruction of the molten pool and analysis of welding quality. Subsection linear stretching histogram equalization was applied to enhance the contrast of the original images firstly, and then edge detection was used to highlight the edges. After that we used the morphology filtering method to produce the segmentation mask, and then combined the mask with the original images to get the final segmentation results. Also, the proposed method was compared with other traditional methods. The experimental results showed that our method not only could give better segmentation results and process large quantities images automatically, but also overcame the less-segmentation problems of traditional methods.

Effects of zinc on the laser welding of an aluminum alloy and galvanized steel

2015 ◽  
Vol 224 ◽  
pp. 49-59 ◽  
Author(s):  
Liu Jia ◽  
Jiang Shichun ◽  
Shi Yan ◽  
Ni Cong ◽  
Chen junke ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Welding ◽  
Galvanized Steel
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