Nd:YAG laser lap welding of coated aluminium alloys

1997 ◽  
Author(s):  
T. Forsman ◽  
J. Powell ◽  
C. Magnusson
2013 ◽  
Vol 284-287 ◽  
pp. 915-918
Author(s):  
Tsung Pin Hung ◽  
Chao Ming Hsu ◽  
Ah Der Lin ◽  
Jao Hwa Kuang

The weld bead temperature distribution and shape during pulsed Nd:YAG laser lap welding are studied. A volumetric heat source model is derived to include the surface flux and the keyhole heat transfer effects in the pulsed laser lap welding process. The proposed pulsed laser heat transfer mode is employed in a simulation with the commercial finite element software Marc. The numerically computed results of the weld pool dimensions are compared with the experimental results. The comparison shows a good agreement between the simulated and measurement results, indicating that the proposed model is feasible. The results reveal that the pulse duration and spot pitch have considerable influence on the temperature field distribution and the residual stress distribution.


2018 ◽  
Vol 108 ◽  
pp. 378-391 ◽  
Author(s):  
Caiwang Tan ◽  
Chengwei Zang ◽  
Xiaoye Zhao ◽  
Hongbo Xia ◽  
Qingshuang Lu ◽  
...  

2010 ◽  
Vol 37-38 ◽  
pp. 634-642 ◽  
Author(s):  
Shi Quan Zhou ◽  
Zhen Guo Peng

The basic feasibility of laser fusion welding for prefabrication and assembly of zinc-coated sheet steel auto body components has been demonstrated in a significant number of prior studies. For trouble-free high volume manufacturing, however, one leading key technical concern remains incompletely resolved. In lap or similar weld joint geometries, venting of trapped Zn vapour can seriously disturb the molten weld pool and give rise to gross fusion defects. In this paper, the technical status of the issue has been reviewed, and various experiments were planned to explore Al foil as an interlayer and dual beam laser for suppressing Zn vapour. The results have shown that the welding processing is very sTable when the lap 1+1 mm sheet steel is welded by using Nd-Yag laser at 3KW power and 4m/min travel speed (defined as single beam) with 75μm Al foil as interlayer. However, if first using 2KW power and 4m/min travel speed, secondly using 3KW power and4m/min travel speed (defined as dual beam), only 25 μm Al foil can stabilize welding fusion pool. It is found that Al foil just store the Zn vapour in the single beam method and cannot mix with Zn to form Al-Zn binary alloy, because the laser heating is too fast that Zn has been vaporized before Al was melted. But Al can mix with Zn to form Al-Zn binary alloy in the dual beam method, therefore, the boiling temperature is raised to about 1600°C. So that, in laser lap welding of Zn coated (galvanized) sheet steel, the Al-Zn alloy will be more effective than Al metal for stabilizing welding process.


2013 ◽  
Vol 30 (9) ◽  
pp. 931-942 ◽  
Author(s):  
Yun Seok Yang ◽  
Eun Kyeong Park ◽  
Ka Ram Lee ◽  
Young Tae Yoo

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 49-50
Author(s):  
Masafumi YAMAKAWA ◽  
Shinya HAYAKAWA ◽  
Takashi NAKAMURA ◽  
Tatsuya HASEGAWA

Vacuum ◽  
2017 ◽  
Vol 136 ◽  
pp. 10-13 ◽  
Author(s):  
Peng Liu ◽  
Ke-yun Feng ◽  
Ge-ming Zhang

2017 ◽  
Vol 29 (2) ◽  
pp. 022423 ◽  
Author(s):  
Erkan Caner Ozkat ◽  
Pasquale Franciosa ◽  
Dariusz Ceglarek

Sign in / Sign up

Export Citation Format

Share Document