Laser welding process–a review of keyhole welding modelling
Laser welding is used in several industrial applications. It can be distinguished between
conduction mode and keyhole mode welding, between pulsed wave and cw laser welding …
conduction mode and keyhole mode welding, between pulsed wave and cw laser welding …
[HTML][HTML] Fluid and particle dynamics in laser powder bed fusion
In this work, we employ a combination of high-speed imaging and schlieren imaging, as well
as multiphysics modelling, to elucidate the effects of the interaction between the laser beam …
as multiphysics modelling, to elucidate the effects of the interaction between the laser beam …
Effects of relative positioning of energy sources on weld integrity for hybrid laser arc welding
S Liu, Y Li, F Liu, H Zhang, H Ding - Optics and Lasers in Engineering, 2016 - Elsevier
This study is concerned with the effects of laser and arc arrangement on weld integrity for the
hybrid laser arc welding processes. Experiments were conducted for a high-strength steel …
hybrid laser arc welding processes. Experiments were conducted for a high-strength steel …
Investigation of keyhole plume and molten pool based on a three-dimensional dynamic model with sharp interface formulation
Laser keyhole welding is a complicated multi-phases, multi-physics process, especially
when assisting gases are involved. A three-dimensional transient model is developed to …
when assisting gases are involved. A three-dimensional transient model is developed to …
A quantitative model of keyhole instability induced porosity in laser welding of titanium alloy
S Pang, W Chen, W Wang - Metallurgical and Materials Transactions A, 2014 - Springer
Quantitative prediction of the porosity defects in deep penetration laser welding has
generally been considered as a very challenging task. In this study, a quantitative model of …
generally been considered as a very challenging task. In this study, a quantitative model of …
Influence of absorption mechanisms on laser-induced plasma plume
R Rozman, I Grabec, E Govekar - Applied Surface Science, 2008 - Elsevier
In modelling laser-induced plasma plume formation, the proper description of laser
absorption in the plasma plays an important role. In the present model, absorption is …
absorption in the plasma plays an important role. In the present model, absorption is …
Dynamic characteristics and mechanisms of compressible metallic vapor plume behaviors in transient keyhole during deep penetration fiber laser welding
The compressible metallic vapor plume or plasma plume behaviors in the keyhole during
deep penetration laser welding have significant effects on the joint quality. However, these …
deep penetration laser welding have significant effects on the joint quality. However, these …
Effect of shielding conditions on bead profile and melting behaviour in laser powder bed fusion additive manufacturing
A series of experiments were performed using a 500 W continuous wave fibre laser on a
single powder bed layer using different processing variables. The aim was to investigate the …
single powder bed layer using different processing variables. The aim was to investigate the …
A pragmatic continuum level model for the prediction of the onset of keyholing in laser powder bed fusion
AM Philo, S Mehraban, M Holmes, S Sillars… - … International Journal of …, 2019 - Springer
Laser powder bed fusion (L-PBF) is a complex process involving a range of multi-scale and
multi-physical phenomena. There has been much research involved in creating numerical …
multi-physical phenomena. There has been much research involved in creating numerical …
Shielding gas influences on laser weldability of tailored blanks of advanced automotive steels
The effects of shielding gas types and flow rates on CO2 laser weldability of DP600/TRIP700
steel sheets were studied in this work. The evaluated shielding gases were helium (He) …
steel sheets were studied in this work. The evaluated shielding gases were helium (He) …