Numerical modeling of molten pool formation during an interaction of a pulse laser (Nd:YAG) with an aluminum sheet

2005 ◽  
Author(s):  
Nicolas Pierron ◽  
Pierre Sallamand ◽  
Simone Matteï
Keyword(s):  
Numerical Modeling ◽  
Pulse Laser ◽  
Molten Pool ◽  
Aluminum Sheet ◽  
Pool Formation

Numerical and experimental studies of molten pool formation during an interaction of a pulse laser (Nd:YAG) with a magnesium alloy

2009 ◽  
Vol 41 (4) ◽  
pp. 470-480 ◽  
Author(s):  
Kamel Abderrazak ◽  
Wassim Kriaa ◽  
Wacef Ben Salem ◽  
Hatem Mhiri ◽  
Georges Lepalec ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Pulse Laser ◽  
Molten Pool ◽  
Experimental Studies ◽  
Pool Formation

Characteristics of droplet transfer, molten pool formation, and weld bead formation of oscillating laser hot-wire tungsten inert gas hybrid welding

2021 ◽  
Vol 33 (1) ◽  
pp. 012027
Author(s):  
Chengyuan Ma ◽  
Bo Chen ◽  
Caiwang Tan ◽  
Xiaoguo Song ◽  
Jicai Feng
Keyword(s):  
Molten Pool ◽  
Weld Bead ◽  
Inert Gas ◽  
Hybrid Welding ◽  
Hot Wire ◽  
Droplet Transfer ◽  
Bead Formation ◽  
Weld Bead Formation ◽  
Pool Formation

Numerical modeling of ultrashort-pulse laser ablation of silicon

2009 ◽  
Vol 255 (17) ◽  
pp. 7605-7609 ◽  
Author(s):  
D.P. Korfiatis ◽  
K.-A. Th. Thoma ◽  
J.C. Vardaxoglou
Keyword(s):  
Numerical Modeling ◽  
Laser Ablation ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Pulse Laser Ablation ◽  
Ultrashort Pulse Laser

Numerical simulation of molten pool formation during laser transmission welding between PET and SUS304

2022 ◽  
Vol 131 ◽  
pp. 105860
Author(s):  
Wei Xu ◽  
Pin Li ◽  
Huixia Liu ◽  
Hao Wang ◽  
Xiao Wang
Keyword(s):  
Numerical Simulation ◽  
Molten Pool ◽  
Laser Transmission Welding ◽  
Pool Formation

Time-dependent calculations of molten pool formation and thermal plasma with metal vapour in gas tungsten arc welding

2010 ◽  
Vol 43 (43) ◽  
pp. 434009 ◽  
Author(s):  
M Tanaka ◽  
K Yamamoto ◽  
S Tashiro ◽  
K Nakata ◽  
E Yamamoto ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Arc Welding ◽  
Molten Pool ◽  
Gas Tungsten Arc Welding ◽  
Time Dependent ◽  
Metal Vapour ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Pool Formation

Experimental Measurements and Numerical Modeling Validation of Temperature Distribution in Tissue Medium During Short Pulse Laser Irradiation

2007 ◽  
Author(s):  
Ashim Dutta ◽  
Kyunghan Kim ◽  
Kunal Mitra ◽  
Zhixiong Guo
Keyword(s):  
Numerical Modeling ◽  
Heat Conduction ◽  
Temperature Distribution ◽  
Laser Beam ◽  
Pulse Laser ◽  
Short Pulse ◽  
Hyperbolic Heat Conduction ◽  
Experimental Measurements ◽  
Conduction Model ◽  
Short Pulse Laser

The objective of this paper is to analyze the temperature distributions and heat affected zone in skin tissue medium when irradiated with either a collimated or a focused laser beam from a short pulse laser source. Single-layer and three-layer tissue phantoms containing embedded inhomogeneities are used as a model of human skin tissue having subsurface tumor. Q-switched Nd:YAG laser is used in this study. Experimental measurements of axial and radial temperature distribution in the tissue phantom are compared with the numerical modeling results. For numerical modeling, the transient radiative transport equation is first solved using discrete ordinates method for obtaining the intensity distribution and radiative heat flux inside the tissue medium. Then the temperature distribution is obtained by coupling the bio-heat transfer equation with either hyperbolic non-Fourier or parabolic Fourier heat conduction model. The hyperbolic heat conduction equation is solved using MacCormack’s scheme with error terms correction. It is observed that experimentally measured temperature distribution is in good agreement with that predicted by hyperbolic heat conduction model. The experimental measurements also demonstrate that converging laser beam focused directly at the subsurface location can produce desired high temperature at that location as compared to that produced by collimated laser beam for the same laser parameters.

Numerical and experimental study of molten pool formation during continuous laser welding of AZ91 magnesium alloy

2009 ◽  
Vol 44 (3) ◽  
pp. 858-866 ◽  
Author(s):  
Kamel Abderrazak ◽  
Sana Bannour ◽  
Hatem Mhiri ◽  
Georges Lepalec ◽  
Michel Autric
Keyword(s):  
Experimental Study ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Molten Pool ◽  
Continuous Laser ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium ◽  
Pool Formation

Numerical Modeling of Heat Distribution in the Electron Beam Melting® of Ti-6Al-4V

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Mahdi Jamshidinia ◽  
Fanrong Kong ◽  
Radovan Kovacevic
Keyword(s):  
Numerical Modeling ◽  
Electron Beam ◽  
Process Parameters ◽  
Molten Pool ◽  
Electron Beam Melting ◽  
Flow Model ◽  
Numerical Models ◽  
Heat Distribution ◽  
Powder Bed ◽  
Thermal Fluid Flow

Electron beam melting® (EBM) is one of the fastest growing additive manufacturing processes capable of building parts with complex geometries, made predominantly of Ti-alloys. Providing an understanding of the effects of process parameters on the heat distribution in a specimen built by EBM®, could be the preliminary step toward the microstructural and consequently mechanical properties control. Numerical modeling is a useful tool for the optimization of processing parameters, because it decreases the level of required experimentation and significantly saves on time and cost. So far, a few numerical models are developed to investigate the effects of EBM® process parameters on the heat distribution and molten pool geometry. All of the numerical models have ignored the material convection inside the molten pool that affects the real presentation of the temperature distribution and the geometry of molten pool. In this study, a moving electron beam heat source and temperature dependent properties of Ti-6Al-4V were used in order to provide a 3D thermal-fluid flow model of EBM®. The influence of process parameters including electron beam scanning speed, electron beam current, and the powder bed density were studied. Also, the effects of flow convection in temperature distribution and molten pool geometry were investigated by comparing a pure-thermal with the developed thermal-fluid flow model. According to the results, the negative temperature coefficient of surface tension in Ti-6Al-4V was responsible for the formation of an outward flow in the molten pool. Also, results showed that ignoring the material convection inside the molten pool resulted in the formation of a molten pool with narrower width and shorter length, while it had a deeper penetration and higher maximum temperature in the molten pool. Increasing the powder bed density was accompanied with an increase in the thermal conductivity of the powder bed that resulted in a reduction in the molten pool width on the powder bed top surface. Experimental measurements of molten pool width and depth are performed to validate the numerical model.

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