Influence of process-related heat accumulation of laser beam welded 1.7035 round bars on weld pool shape and weld defects

2021 ◽  
Vol 33 (4) ◽  
pp. 042007
Author(s):  
J. Grajczak ◽  
C. Nowroth ◽  
T. Coors ◽  
J. Twiefel ◽  
J. Wallaschek ◽  
...  
Keyword(s):  
Laser Beam ◽  
Weld Pool ◽  
Heat Accumulation ◽  
Pool Shape ◽  
Weld Defects ◽  
Weld Pool Shape

Modeling the Transport Phenomena in Moving 3-D Dual-Beam Laser Keyhole Welding

2005 ◽  
Author(s):  
J. Zhou ◽  
H. L. Tsai ◽  
P. C. Wang
Keyword(s):  
Laser Beam ◽  
Laser Welding ◽  
Weld Pool ◽  
Transport Phenomena ◽  
Pool Shape ◽  
Beam Laser ◽  
Dual Beam ◽  
Laser Keyhole Welding ◽  
Weld Pool Shape ◽  
Welding Technique

In recent years, laser-beam welding using two laser beams, or dual-beam laser welding, has become an emerging welding technique. Previous studies have demonstrated that it can provide benefits over conventional single-beam laser welding, such as increasing keyhole stability, slowing down cooling rate and delaying the humping onset to a higher welding speed. It is reported that the dual beam laser welding can significantly improve weld quality. However, so far the development of the dual-beam laser welding technique has been limited to the trial-and-error procedure. In this study, the objective is to develop mathematical models and the associated numerical techniques to investigate the transport phenomena, such as heat transfer, metal flow, keyhole formation and weld pool shape evolutions during the moving three-dimensional dual-beam laser keyhole welding. Detailed studies have been conducted to determine the effects of key parameters, such as laser-beam configuration on weld pool fluid flow, weld shape, and keyhole dynamics. Some experimentally observed phenomena, such as the changes of the weld pool shape from oval to circle and from circle to oval during the welding process are predicted and can be well explained by the present model.

scholarly journals Weld pool shape observation in high power laser beam welding

Procedia CIRP ◽  
2018 ◽  
Vol 74 ◽  
pp. 683-686 ◽  
Author(s):  
Antoni Artinov ◽  
Nasim Bakir ◽  
Marcel Bachmann ◽  
Andrey Gumenyuk ◽  
Michael Rethmeier
Keyword(s):  
Laser Beam ◽  
Weld Pool ◽  
High Power ◽  
Laser Beam Welding ◽  
High Power Laser ◽  
Power Laser ◽  
Pool Shape ◽  
Weld Pool Shape

Weld pool shape prediction in plasma augmented laser welded steel

2001 ◽  
Vol 6 (5) ◽  
pp. 305-314 ◽  
Author(s):  
J.M. Vitek ◽  
S.A. David ◽  
M.W. Richey ◽  
J. Biffin ◽  
N. Blundell ◽  
...  
Keyword(s):  
Weld Pool ◽  
Welded Steel ◽  
Pool Shape ◽  
Shape Prediction ◽  
Weld Pool Shape

scholarly journals Effect of Torch Angle on Arc Properties and Weld Pool Shape in Stationary GTAW

2013 ◽  
Vol 139 (9) ◽  
pp. 1268-1277 ◽  
Author(s):  
S. Parvez ◽  
M. Abid ◽  
D. H. Nash ◽  
H. Fawad ◽  
A. Galloway
Keyword(s):  
Weld Pool ◽  
Pool Shape ◽  
Torch Angle ◽  
Weld Pool Shape

Weld Pool Weld Width Prediction Based on Artificial Neural Network

2013 ◽  
Vol 462-463 ◽  
pp. 171-174
Author(s):  
Xiao Gang Liu ◽  
Le Ting Liu
Keyword(s):  
Neural Network ◽  
Weld Pool ◽  
Bp Neural Network ◽  
Arc Welding ◽  
Welding Process ◽  
Pool Shape ◽  
Weld Width ◽  
Network Method ◽  
Weld Pool Shape

In the COgas shielded arc welding, the weld pool forms is closely related to the quality of welding,but weld pool shape is affected by the welding process parameters. By using BP neural network to predict weld puddle weld width, the results show that the experimental data are very close, thus indicating that prediction of weld width through this network method is very effective.

Molten Pool in Welding Processes: Phenomenological vs Fluid-Dynamic Numerical Simulation Approach

2017 ◽  
Vol 884 ◽  
pp. 26-40 ◽  
Author(s):  
Paolo Ferro
Keyword(s):  
Numerical Simulation ◽  
Residual Stresses ◽  
Fusion Zone ◽  
Weld Pool ◽  
Fluid Dynamic ◽  
Subsequent Development ◽  
Grain Structure ◽  
Pool Shape ◽  
Welding Processes ◽  
Weld Pool Shape

The metallurgical and mechanical properties of fusion welded joints are influenced, among others phenomena, by the weld pool dimension and shape. Weld pool shape is important in the development of grain structure and dendrite growth selection process as well as in the development of residual stresses. For these reasons, significant advances have been made in recent years to understand, in greater detail, the dynamics of the heat and fluid flow in the weld and the subsequent development of the pool shape. In numerical simulation of welding processes, there are two different approaches used to model the fusion zone. If the prediction of distortions and residual stresses is the primary objective of the simulation (computational weld mechanics simulation), the phenomenological approach is the most suitable method used to model the fusion zone. Otherwise, when the weld pool shape has to be predicted, the fluid-dynamic equations must be solved at the expense of a significant ‘computational load’ increase. In this work, after a brief description of weld pool characteristics, such two different approaches are described and compared.

Study of the law between the weld pool shape variations with the welding parameters under two TIG processes

2012 ◽  
Vol 212 (1) ◽  
pp. 128-136 ◽  
Author(s):  
Dongjie Li ◽  
Shanping Lu ◽  
Wenchao Dong ◽  
Dianzhong Li ◽  
Yiyi Li
Keyword(s):  
Weld Pool ◽  
Welding Parameters ◽  
Pool Shape ◽  
The Law ◽  
Weld Pool Shape
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