Dissimilar laser spot welding of aluminum alloy to steel in keyhole mode

2022 ◽  
Vol 34 (1) ◽  
pp. 012009
Author(s):  
Rui Xiao ◽  
Yixuan Zhao ◽  
Hongbing Liu ◽  
J. P. Oliveira ◽  
Caiwang Tan ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Spot Welding ◽  
Laser Spot ◽  
Laser Spot Welding

scholarly journals X-ray phase contrast observation of solidification and hot crack propagation in laser spot welding of aluminum alloy

2018 ◽  
Vol 26 (18) ◽  
pp. 22626 ◽  
Author(s):  
Masanori Miyagi ◽  
Yousuke Kawahito ◽  
Hongze Wang ◽  
Hiroshi Kawakami ◽  
Takahisa Shoubu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Crack Propagation ◽  
Spot Welding ◽  
Phase Contrast ◽  
Laser Spot ◽  
X Ray ◽  
Hot Crack ◽  
Laser Spot Welding

Laser Spot Welding of LF6 Aluminum Alloy with Filler Wire

2013 ◽  
Vol 40 (11) ◽  
pp. 1103007
Author(s):  
陶汪 Tao Wang ◽  
马轶男 Ma Yinan ◽  
陈彦宾 Chen Yanbin ◽  
任跃冲 Ren Yuechong
Keyword(s):  
Aluminum Alloy ◽  
Spot Welding ◽  
Laser Spot ◽  
Filler Wire ◽  
Laser Spot Welding

Finite Element Modeling of Laser Spot Welded Lap Joint

2008 ◽  
Vol 580-582 ◽  
pp. 291-294
Author(s):  
Zhi Guo Gao ◽  
Jian Huang ◽  
Yi Xiong Wu
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Finite Element Modeling ◽  
Spot Welding ◽  
Laser Spot ◽  
Lap Joint ◽  
Element Modeling ◽  
Laser Spot Welding ◽  
Spot Welded

For many years, rivet joint technology has been applied in the automotive and aerospace industry. Recently, it began to apply laser welding technology to lap joints instead of rivet joining. Laser spot welding has some potential advantages including time saving, cost reduction, material saving and weight reducing. A lap joint of aluminum alloy LY12 with different plate thickness, namely 2mm and 1mm, was spot-welded by CO2 laser. For the welding, laser power in pulse form with ramping-up and cooling-down shape was used, and pure helium gas served as shielding gas to fill around welding area. In this study transient three-dimensional non-linear finite element modeling was used to analyze heat flow and residual stress of the laser spot welding of aluminum alloy LY12. In modeling the temperature dependence of material properties, influence of contact surfaces are taken into account. To analyze, Gaussian distributed heat source model and thermo-elasto-plastic behavior were applied. Weld dimensions and residual stress at the weld surface were calculated numerically and compared with the experimental results.

Monitoring of YAG laser spot welding

2000 ◽  
Author(s):  
Daisuke Yamada ◽  
Shunro Yoshioka ◽  
Toshiyuki Miyazaki ◽  
Tadashi Misu ◽  
Yasuyuki Shirai
Keyword(s):  
Spot Welding ◽  
Laser Spot ◽  
Yag Laser ◽  
Laser Spot Welding

Thermomechanical Modeling of Laser Spot Welded Solar Absorbers

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
L. A. Spyrou ◽  
N. Aravas
Keyword(s):  
Spot Welding ◽  
Laser Spot ◽  
Structural Failure ◽  
Absorber Plate ◽  
Solar Absorber ◽  
Solar Absorbers ◽  
Laser Spot Welding ◽  
Thermomechanical Modeling ◽  
Different Levels ◽  
Flattening Process

A finite element (FE) approach is developed to investigate the laser spot welding (LSW) of flat-plate solar absorbers and the stress and distortion fields that develop after fabrication and during operation. Numerical calculations at two different levels are carried out. At a microscopic scale, the details of a spot weld are analyzed. At a macroscopic level, a global approach is used to simulate the joining of the pipeline to the absorber plate and the “restoration” (flattening) process of the absorber. The simulated welding-induced distortion is compared with experimental measurements. The thermomechanical behavior of a solar absorber under working conditions is also studied and operational stresses and the critical locations for structural failure are reported.

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