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Journal articles on the topic 'Melt pool convection'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

Yang, Ruining, Wenjin Chen, Linfeng Tang, et al. "Research on the Melt Pool Shape Formation Mechanism of the Laser Surface Remelting of Nickel-Based Single-Crystal Superalloy." Crystals 13, no. 8 (2023): 1162. http://dx.doi.org/10.3390/cryst13081162.

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By numerical simulation and experimental analysis, the melt pool shapes for the laser surface remelting of nickel-based single-crystal superalloy under different processing parameters are investigated. The results show that heat conduction and heat convection work together to determine the formation of the melt pool during the laser surface remelting, and the melt pool shape can be controlled by adjusting the laser power and laser scanning speed. For processing with large laser power and low scanning speed, the alloy vaporizes in the melt pool, which makes the melt pool shape unstable. For las

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2

Jähnig, Theresa, Cornelius Demuth, and Andrés Fabián Lasagni. "Influence of Sulphur Content on Structuring Dynamics during Nanosecond Pulsed Direct Laser Interference Patterning." Nanomaterials 11, no. 4 (2021): 855. http://dx.doi.org/10.3390/nano11040855.

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The formation of melt and its spread in materials is the focus of many high temperature processes, for example, in laser welding and cutting. Surface active elements alter the surface tension gradient and therefore influence melt penetration depth and pool width. This study describes the application of direct laser interference patterning (DLIP) for structuring steel surfaces with diverse contents of the surface active element sulphur, which affects the melt convection pattern and the pool shape during the process. The laser fluence used is varied to analyse the different topographic features

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3

Das, Saurabh, and Satya Prakash Kar. "Role of Marangoni Convection in a Repetitive Laser Melting Process." Materials Science Forum 978 (February 2020): 34–39. http://dx.doi.org/10.4028/www.scientific.net/msf.978.34.

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To effectively interpret the fluid flow dynamics in the molten metal pool, a numerical model was established. The moving repetitive Gaussian laser pulse is irradiated in the work piece. The consideration of laser scanning speed makes the transport phenomena complex. The continuity and momentum equations are solved to get the flow velocity of the molten metal in the melt pool. The energy equation is solved to know the temperature field in the work piece. The algebraic equations obtained after discretization of the governing equations by Finite Volume Method (FVM) are then solved by the Tri Diag

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4

Han, Lijun, Frank W. Liou, and Srinivas Musti. "Thermal Behavior and Geometry Model of Melt Pool in Laser Material Process." Journal of Heat Transfer 127, no. 9 (2005): 1005–14. http://dx.doi.org/10.1115/1.2005275.

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Melt pool geometry and thermal behavior control are essential in obtaining consistent building performances, such as geometrical accuracy, microstructure, and residual stress. In this paper, a three dimensional model is developed to predict the thermal behavior and geometry of the melt pool in the laser material interaction process. The evolution of the melt pool and effects of the process parameters are investigated through the simulations with stationary and moving laser beam cases. The roles of the convection and surface deformation on the heat dissipation and melt pool geometry are reveale

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5

Aggoune, Samia, Farida Hamadi, Karim Kheloufi, et al. "The Marangoni Convection Effect on Melt Pool Formation during Selective Laser Melting Process." Defect and Diffusion Forum 412 (November 12, 2021): 107–14. http://dx.doi.org/10.4028/www.scientific.net/ddf.412.107.

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In order to predict the effect of the Marangoni convection and the morphology of melted stainless steel powder, during the selective laser melting (SLM) process, a transient three-dimensional numerical model is developed at the mesoscale. The evolution of the temperature and velocity fields’ is then studied. The initial powder bed distribution is obtained by the discrete element method (DEM) calculation, and the temperature distribution and the molten pool shape deformation are calculated and analyzed by the Ansys-Fluent commercial code. The molten pool shape is obtained by considering the inf

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6

Tan, M. J., D. H. Cho, and F. B. Cheung. "Thermal Analysis of Heat-Generating Pools Bounded From Below by Curved Surfaces." Journal of Heat Transfer 116, no. 1 (1994): 127–35. http://dx.doi.org/10.1115/1.2910846.

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A computer code that features the use of a directional effective thermal conductivity in modeling natural convection in heat-generating pools has been developed to analyze heat transfer in such pools, which are bounded from below by curved surfaces. Illustrative calculations pertaining to two published experimental studies on convective heat transfer in water pools with uniformly distributed volumetric energy sources are carried out using the code. The water pools used in the two studies under consideration were cooled either from the top or from the bottom, but not from both. The utility as w

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7

Fan, T. H., and F. B. Cheung. "Modeling of Transient Turbulent Natural Convection in a Melt Layer With Solidification." Journal of Heat Transfer 119, no. 3 (1997): 544–52. http://dx.doi.org/10.1115/1.2824137.

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The phenomenon of turbulent natural convection in a horizontal heat-generating melt layer with solidification taking place at the cooled upper and lower boundaries is investigated theoretically. The objective is to determine the transient behavior of the crust at the upper and lower surfaces and the effect of crust formation on the turbulent natural convection process in the melt layer. Various surface temperatures, latent heats, and the heat source strengths are considered along with the effects of the Stefan number and Rayleigh number. Special attention is given to the interaction between th

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8

Demuth, Cornelius, and Andrés Fabián Lasagni. "An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning." Computation 8, no. 1 (2020): 9. http://dx.doi.org/10.3390/computation8010009.

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Functional surfaces characterised by periodic microstructures are sought in numerous technological applications. Direct laser interference patterning (DLIP) is a technique that allows the fabrication of microscopic periodic features on different materials, e.g., metals. The mechanisms effective during nanosecond pulsed DLIP of metal surfaces are not yet fully understood. In the present investigation, the heat transfer and fluid flow occurring in the metal substrate during the DLIP process are simulated using a smoothed particle hydrodynamics (SPH) methodology. The melt pool convection, driven

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9

Zou, Fan, Shuguang Yao, Yunhui Dong, et al. "Research on Multiscale Numerical Simulation Method for SLM Melting Process." Metals 14, no. 7 (2024): 825. http://dx.doi.org/10.3390/met14070825.

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In the selective-laser-melting process, it is difficult to monitor the evolution of the melt pool in real time via experimental methods due to the complexity and fine scale of laser–powder interaction; numerical simulation has become an important technical way to study the selective-laser-melting process. A coupled thermal–fluid model of the SLM single-layer melt-channel-forming process is constructed based on hydrodynamic theory for AlSi10Mg metallic materials, and the SLM single-layer melt-channel-forming process is investigated by combining parametric experiments and numerical simulation me

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10

Wei, P. S., H. J. Liu, and C. L. Lin. "Scaling weld or melt pool shape induced by thermocapillary convection." International Journal of Heat and Mass Transfer 55, no. 9-10 (2012): 2328–37. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.01.034.

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11

Wei, Hongyang, Yi-Tung Chen, and Jie Cheng. "Review of experimental study on melt pool natural convection behavior." Annals of Nuclear Energy 122 (December 2018): 101–17. http://dx.doi.org/10.1016/j.anucene.2018.08.008.

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12

Ur Rehman, Asif, Muhammad Arif Mahmood, Fatih Pitir, Metin Uymaz Salamci, Andrei C. Popescu, and Ion N. Mihailescu. "Mesoscopic Computational Fluid Dynamics Modelling for the Laser-Melting Deposition of AISI 304 Stainless Steel Single Tracks with Experimental Correlation: A Novel Study." Metals 11, no. 10 (2021): 1569. http://dx.doi.org/10.3390/met11101569.

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For laser-melting deposition (LMD), a computational fluid dynamics (CFD) model was developed using the volume of fluid and discrete element modeling techniques. A method was developed to track the flow behavior, flow pattern, and driving forces of liquid flow. The developed model was compared with experimental results in the case of AISI 304 stainless steel single-track depositions on AISI 304 stainless steel substrate. A close correlation was found between experiments and modeling, with a deviation of 1–3%. It was found that the LMD involves the simultaneous addition of powder particles that

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13

Mangsor, A. S., A. A. Salim, S. K. Ghoshal, and Muhammad Safwan Abd Aziz. "Melt Pool Flow Dynamics of Copper Imbued Surface Alloyed 304 Stainless Steel: Role of Laser Power and Scanning Speed Tuning." Malaysian Journal of Fundamental and Applied Sciences 20, no. 4 (2024): 939–45. http://dx.doi.org/10.11113/mjfas.v20n4.3427.

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This study emphasizes the crucial role of Marangoni convection in the laser surface-alloying of 304 stainless steel (304 SS) with copper (Cu). By studying the microscopic behavior of the melt pool during CO2 laser alloying, the study reveals the association between Marangoni convection and the resulting microstructure. The findings demonstrate that the most optimum deposited track can be observed at power 80 W with a scanning speed of 0.4950 mm/s while the highest scanning speed of 0.6329 mm/s produced the finest grains. From the microhardness analysis, sample with the scanning speed of 0.6329

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14

Janicki, Damian. "Effect of Chromium and Molybdenum Addition on the Microstructure of In Situ TiC-Reinforced Composite Surface Layers Fabricated on Ductile Cast Iron by Laser Alloying." Materials 13, no. 24 (2020): 5750. http://dx.doi.org/10.3390/ma13245750.

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In situ TiC-reinforced composite surface layers (TRLs) were produced on a ductile cast iron substrate by laser surface alloying (LA) using pure Ti powder and mixtures of Ti-Cr and Ti-Mo powders. During LA with pure Ti, the intensity of fluid flow in the molten pool, which determines the TRL’s compositional uniformity, and thus Ti content in the alloyed zone, was directly affected by the fraction of synthesized TiC particles in the melt—with increasing the TiC fraction, the convection was gradually reduced. The introduction of additional Cr or Mo powders into the molten pool, due to their benef

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15

Choi, J., L. Han, and Y. Hua. "Modeling and Experiments of Laser Cladding With Droplet Injection." Journal of Heat Transfer 127, no. 9 (2005): 978–86. http://dx.doi.org/10.1115/1.2005273.

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Laser aided Directed Material Deposition (DMD) is an additive manufacturing process based on laser cladding. A full understanding of laser cladding is essential in order to achieve a steady state and robust DMD process. A two dimensional mathematical model of laser cladding with droplet injection was developed to understand the influence of fluid flow on the mixing, dilution depth, and deposition dimension, while incorporating melting, solidification, and evaporation phenomena. The fluid flow in the melt pool that is driven by thermal capillary convection and an energy balance at the liquid–va

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16

Sukumar, Siladitya, and Satya Prakash Kar. "Thermal Modeling of Transport Phenomena for a Pulsed Laser Melting Process." Materials Science Forum 978 (February 2020): 114–20. http://dx.doi.org/10.4028/www.scientific.net/msf.978.114.

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Single pulsed laser melting in a cylindrical titanium alloy work piece is studied numerically using an axisymmetric model. Finite volume method and Tri-Diagonal Matrix Algorithm (TDMA) are used for discretization of the energy equation and solving the resulting algebraic equation respectively in order to obtain temperature distribution inside the computational domain. Heat losses from the irradiated surface takes place through convection and radiation and other surfaces are kept insulated. A volumetric and Gaussian laser is irradiated on the work piece. Validation of the present model with the

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17

Li, Linmin, Baokuan Li, Lichao Liu, and Yuichi Motoyama. "Numerical Modeling of Fluid Flow, Heat Transfer and Arc–Melt Interaction in Tungsten Inert Gas Welding." High Temperature Materials and Processes 36, no. 4 (2017): 427–39. http://dx.doi.org/10.1515/htmp-2016-0120.

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AbstractThe present work develops a multi-region dynamic coupling model for fluid flow, heat transfer and arc–melt interaction in tungsten inert gas (TIG) welding using the dynamic mesh technique. The arc–weld pool unified model is developed on basis of magnetohydrodynamic (MHD) equations and the interface is tracked using the dynamic mesh method. The numerical model for arc is firstly validated by comparing the calculated temperature profiles and essential results with the former experimental data. For weld pool convection solution, the drag, Marangoni, buoyancy and electromagnetic forces are

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18

Zavalov, Y. N., A. V. Dubrov, P. S. Rodin, E. S. Makarova, and V. D. Dubrov. "Analysis of the intermittent laser-induced thermocapillary convection of the melt by the method of short-time correlation." Journal of Physics: Conference Series 2498, no. 1 (2023): 012041. http://dx.doi.org/10.1088/1742-6596/2498/1/012041.

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Abstract Online video diagnostics was used in the process of laser metal deposition. The method of short-time correlation was applied to analyse fluctuations in the size of the molten pool. Power distributions of the cross correlation of the breadth and length of the pool depending on the intensity of laser irradiation up to 30 kW/cm2 are obtained. The intermittency in parameters of the molten pool is associated with changes in the structure of convective Marangoni flows in the melt during the formation of the bead. It is shown to decrease the duration of the regular changes in the parameters

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19

Li, Yourong, Lan Peng, Shuangying Wu, and Nobuyuki Imaishi. "Bifurcation of thermocapillary convection in a shallow annular pool of silicon melt." Acta Mechanica Sinica 23, no. 1 (2007): 43–48. http://dx.doi.org/10.1007/s10409-006-0053-2.

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20

Shi, Wanyuan, You-Rong Li, Michael K. Ermakov, and Nobuyuki Imaishi. "Stability of Thermocapillary Convection in Rotating Shallow Annular Pool of Silicon Melt." Microgravity Science and Technology 22, no. 3 (2010): 315–20. http://dx.doi.org/10.1007/s12217-010-9194-9.

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21

Chang, Qing Ming, Jing Yuan, Yin Kai Yang, Xia Chen, Chang Jun Chen, and Si Qian Bao. "Numerical Study on Laser Cladding of BT20 Alloy." Advanced Materials Research 479-481 (February 2012): 850–53. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.850.

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A 3-D modeling based on the numerical resolution of fluid flow and heat transfer are utilized to investigate the thermal phenomena during laser laser-cladding processes of BT20 alloy. From this model, it has been found that the shape and size of the molten pool in the work piece are affected by laser cladding parameters such as scanning speed and the incident laser power. The effects of process parameters on the melt pool are quantitatively discussed by numerical analysis. Furthermore, it has been observed that the surface tension temperature coefficient, Marangoni convection, which is sensiti

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22

Li, You-Rong, Xin-Xing Zhao, Shuang-Ying Wu, and Lan Peng. "Asymptotic solution of thermocapillary convection in a thin annular pool of silicon melt." Physics of Fluids 20, no. 8 (2008): 082107. http://dx.doi.org/10.1063/1.2975172.

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23

Picasso, M., and A. F. A. Hoadley. "Finite element simulation of laser surface treatments including convection in the melt pool." International Journal of Numerical Methods for Heat & Fluid Flow 4, no. 1 (1994): 61–83. http://dx.doi.org/10.1108/eum0000000004031.

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24

Kumar, Amitesh, and Subhransu Roy. "Effect of three-dimensional melt pool convection on process characteristics during laser cladding." Computational Materials Science 46, no. 2 (2009): 495–506. http://dx.doi.org/10.1016/j.commatsci.2009.04.002.

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25

Li, Chang, Jiabo Liu, Shuchao Li, et al. "Evolutionary Mechanism of Solidification Behavior in the Melt Pool During Disk Laser Cladding with 316L Alloy." Coatings 14, no. 10 (2024): 1337. http://dx.doi.org/10.3390/coatings14101337.

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Laser cladding is an emerging environmentally friendly surface-strengthening technology. During the cladding process, the changes in molten pool temperature and velocity directly affect the solidification process and element distribution. The quantitative revelation of the directional solidification mechanism in the molten pool during the cladding process is crucial for enhancing the quality of the cladding layer. In this study, a multi-field coupling numerical model was developed to simulate the coating process of 316L powder on 45 steel matrices using a disk laser. The instantaneous evolutio

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26

Li, Zhiyong, Gang Yu, Xiuli He, Shaoxia Li, and Zhuang Shu. "Surface Tension-Driven Flow and Its Correlation with Mass Transfer during L-DED of Co-Based Powders." Metals 12, no. 5 (2022): 842. http://dx.doi.org/10.3390/met12050842.

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Laser direct energy deposition (L-DED) is one of the most promising additive manufacturing methods, which has been paid more and more attention in recent years. An improved heat and mass transfer model was developed here to analyze thermal behavior, driving force, surface tension-driven flow and its correlation with dilution during L-DED of Co-based powders to a 38MnVS substrate. Thermal behavior was firstly studied for its fundamental influence on fluid flow and mass transfer. Next, the roles of capillary force and thermal capillary force were characterized using both the dimensional analysis

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27

FAN, Shilong, Fei YANG, Xiaonan ZHU, Zhaowei DIAO, Lin CHEN, and Mingzhe RONG. "Numerical analysis on the effect of process parameters on deposition geometry in wire arc additive manufacturing." Plasma Science and Technology 24, no. 4 (2022): 044001. http://dx.doi.org/10.1088/2058-6272/ac4f41.

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Abstract Here we develop a two-dimensional numerical model of wire and arc additive manufacturing (WAAM) to determine the relationship between process parameters and deposition geometry, and to reveal the influence mechanism of process parameters on deposition geometry. From the predictive results, a higher wire feed rate matched with a higher current could generate a larger and hotter droplet, and thus transfer more thermal and kinetic energy into melt pool, which results in a wider and lower deposited layer with deeper penetration. Moreover, a higher preheat temperature could enlarge melt po

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28

Zhang, Zhengwei, Xinyuan Xu, Peng Ge, and Kai Li. "Numerical Modeling of Electromagnetic Field Influences on Fluid Thermodynamic Behavior and Grain Growth During Solidification of 316L Stainless Steel Laser-Welded Plates." Metals 15, no. 6 (2025): 609. https://doi.org/10.3390/met15060609.

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In the present study, a thermal–electromagnetic hydrodynamics model has been used to study welding temperature and melt flow characteristics during the laser welding of 316L steel. This welding was performed using an assisted electromagnetic field. In addition, a Monte Carlo model was used to study grain growth during solidification with the purpose of achieving a better understanding of the control of the microstructure. Based on the numerical model, which has been validated by experimental data, the effects of the current intensity of the electromagnetic field on the temperature distribution

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29

Song, Boxue, Tianbiao Yu, Xingyu Jiang, Liaoyuan Chen, Wenchao Xi, and Chuang Guan. "Evolution and convection mechanism of the melt pool formed by V-groove laser cladding." Optics & Laser Technology 144 (December 2021): 107443. http://dx.doi.org/10.1016/j.optlastec.2021.107443.

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30

Sehgal, B. R., R. R. Nourgaliev, and T. N. Dinh. "Characterization of heat transfer processes in a melt pool convection and vessel-creep experiment." Nuclear Engineering and Design 211, no. 2-3 (2002): 173–87. http://dx.doi.org/10.1016/s0029-5493(01)00434-4.

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31

Wei, Chao, Heng Gu, Yuchen Gu, et al. "Abnormal interfacial bonding mechanisms of multi-material additive-manufactured tungsten–stainless steel sandwich structure." International Journal of Extreme Manufacturing 4, no. 2 (2022): 025002. http://dx.doi.org/10.1088/2631-7990/ac5f10.

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Abstract Tungsten (W) and stainless steel (SS) are well known for the high melting point and good corrosion resistance respectively. Bimetallic W–SS structures would offer potential applications in extreme environments. In this study, a SS→W→SS sandwich structure is fabricated via a special laser powder bed fusion (LPBF) method based on an ultrasonic-assisted powder deposition mechanism. Material characterization of the SS→W interface and W→SS interface was conducted, including microstructure, element distribution, phase distribution, and nano-hardness. A coupled modelling method, combining co

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32

Tran, Chi-Thanh, and Pavel Kudinov. "The Effective Convectivity Model for Simulation of Molten Metal Layer Heat Transfer in a Boiling Water Reactor Lower Head." Science and Technology of Nuclear Installations 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/231501.

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This paper is concerned with the development of approaches for assessment of core debris heat transfer and Control Rod Guide Tube (CRGT) cooling effectiveness in case of a Boiling Water Reactor (BWR) severe accident. We consider a hypothetical scenario with stratified (metal layer atop) melt pool in the lower plenum. Effective Convectivity Model (ECM) and Phase-Change ECM (PECM) are developed for the modeling of molten metal layer heat transfer. The PECM model takes into account reduced convection heat transfer in mushy zone and compositional convection that enables simulations of noneutectic

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33

Zhang, Quan-Zhuang, Lan Peng, Fei Wang, and Jia Liu. "Thermocapillary convection with bidirectional temperature gradients in a shallow annular pool of silicon melt: Effects of ambient temperature and pool rotation." International Journal of Heat and Mass Transfer 101 (October 2016): 354–64. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.05.015.

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34

Chan, C. L., J. Mazumder, and M. M. Chen. "Effect of surface tension gradient driven convection in a laser melt pool: Three‐dimensional perturbation model." Journal of Applied Physics 64, no. 11 (1988): 6166–74. http://dx.doi.org/10.1063/1.342121.

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35

Hekmatjou, Hamidreza, Zhi Zeng, Jiajia Shen, J. P. Oliveira, and Homam Naffakh-Moosavy. "A Comparative Study of Analytical Rosenthal, Finite Element, and Experimental Approaches in Laser Welding of AA5456 Alloy." Metals 10, no. 4 (2020): 436. http://dx.doi.org/10.3390/met10040436.

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The thermal regime and microstructural phenomenon are studied by using finite-element (FE) modelling and the analytical Rosenthal equation during laser welding of aluminum alloy 5456 (AA5456) components. A major goal is to determine the merits and demerits of this analytical equation which can be an alternative to FE analysis, and to evaluate the effect of imperative assumptions on predicted consequences. Using results from the analytical and numerical approaches in conjunction with experiments, different physical features are compared. In this study, the results obtained from experiments in t

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36

Barua, Shyam, Frank Liou, Joseph Newkirk, and Todd Sparks. "Vision-based defect detection in laser metal deposition process." Rapid Prototyping Journal 20, no. 1 (2014): 77–85. http://dx.doi.org/10.1108/rpj-04-2012-0036.

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Purpose – Laser metal deposition (LMD) is a type of additive manufacturing process in which the laser is used to create a melt pool on a substrate to which metal powder is added. The powder is melted within the melt pool and solidified to form a deposited track. These deposited tracks may contain porosities or cracks which affect the functionality of the part. When these defects go undetected, they may cause failure of the part or below par performance in their applications. An on demand vision system is required to detect defects in the track as and when they are formed. This is especially cr

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37

Billotte, Thomas, Dominique Daloz, Bernard Rouat, et al. "Microsegregation Model Including Convection and Tip Undercooling: Application to Directional Solidification and Welding." Materials 11, no. 7 (2018): 1252. http://dx.doi.org/10.3390/ma11071252.

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The microsegregation behavior of alloy filler metal 52 (FM 52) was studied using microprobe analysis on two different solidification processes. First, microsegregation was characterized in samples manufactured by directional solidification, and then by gas tungsten arc welding (GTAW). The experimental results were compared with Thermo-Calc calculations to verify their accuracy. It was confirmed that the thermodynamic database predicts most alloying elements well. Once this data had been determined, several tip undercooling calculations were carried out for different solidification conditions i

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38

Mo, Dong Ming. "Stability Analysis of Thermocapillary Convection of B₂O₃/Sapphire Melt in an Annular Pool." Materials Science Forum 1036 (June 29, 2021): 175–84. http://dx.doi.org/10.4028/www.scientific.net/msf.1036.175.

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Aiming at the thermocapillary convection stability of sapphire crystal grown by liquid-encapsulated Czochralski method, by non-linear numerical simulation, obtained the flow function and temperature distribution of R-Z cross section, as well as the velocity and temperature distribution at liquid-liquid interface and monitoring point of B2O3/sapphire melt in annular two liquid system, covered with solid upper wall and in microgravity. By means of linear stability analysis, obtained the neutral stability curve and critical stability parameters of the system, and revealed the temperature fluctuat

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39

Khan, Mohammad, Lubon Putul, and Saad Islam. "Numerical Analysis of Heating Technique in Corium Melt Pool Convection Flow Field & Thermal Interaction in a Volumetrically Heated Molten Pool." World Journal of Nuclear Science and Technology 13, no. 01 (2023): 1–10. http://dx.doi.org/10.4236/wjnst.2023.131001.

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40

Giri, Asis, Aram Karbojian, and Bal Raj Sehgal. "ICONE11-36309 Lower Head Failure under coupled Melt Pool Convection and Creep for an American Steel Vessel." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2003 (2003): 68. http://dx.doi.org/10.1299/jsmeicone.2003.68.

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41

Patel, Sushil, Pradeep Reddy, and Arvind Kumar. "A methodology to integrate melt pool convection with rapid solidification and undercooling kinetics in laser spot welding." International Journal of Heat and Mass Transfer 164 (January 2021): 120575. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.120575.

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42

Zitouni, Abdel Halim, Pierre Spiteri, Mouloud Aissani, and Younes Benkheda. "Heat Transfer Mode and Effect of Fluid Flow on the Morphology of the Weld Pool." Defect and Diffusion Forum 406 (January 2021): 66–77. http://dx.doi.org/10.4028/www.scientific.net/ddf.406.66.

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In this work, the heat transfer by conduction and convection mode and effect of fluid flow on the morphology of the weld pool and the welding properties is investigated during Tungsten Inert Gas (TIG) process. In the first part, a computation code under Fortran was elaborated to solve the equations resulting from the finite difference discretization of the heat equation, taking into account the liquid-solid phase change with the associated boundary conditions. In order to calculate the velocity field during welding, the Navier-Stokes equations in the melt zone were simplified and solved consid

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43

Zitouni, Abdel Halim, Pierre Spiteri, Mouloud Aissani, and Younes Benkheda. "Heat Transfer Mode and Effect of Fluid Flow on the Morphology of the Weld Pool." Defect and Diffusion Forum 406 (January 2021): 66–77. http://dx.doi.org/10.4028/www.scientific.net/ddf.406.66.

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In this work, the heat transfer by conduction and convection mode and effect of fluid flow on the morphology of the weld pool and the welding properties is investigated during Tungsten Inert Gas (TIG) process. In the first part, a computation code under Fortran was elaborated to solve the equations resulting from the finite difference discretization of the heat equation, taking into account the liquid-solid phase change with the associated boundary conditions. In order to calculate the velocity field during welding, the Navier-Stokes equations in the melt zone were simplified and solved consid

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Li, Kai, Zhenyu Zhao, Houming Zhou, et al. "Numerical Simulation of Effect of Different Initial Morphologies on Melt Hydrodynamics in Laser Polishing of Ti6Al4V." Micromachines 12, no. 5 (2021): 581. http://dx.doi.org/10.3390/mi12050581.

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As a surface finishing technique for rapid remelting and re-solidification, laser polishing can effectively eliminate the asperities so as to approach the feature size. Nevertheless, the polished surface quality is significantly sensitive to the processing parameters, especially with respect to melt hydrodynamics. In this paper, a transient two-dimensional model was developed to demonstrate the molten flow behavior for different surface morphologies of the Ti6Al4V alloy. It is illustrated that the complex evolution of the melt hydrodynamics involving heat conduction, thermal convection, therma

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Wang, Yixin, Jianzhong Zhou, Teng Zhang, Pengfei Li, Hao Zhu, and Xiankai Meng. "Effects of WC Particles on the Microstructure of IN718/WC Composite Coatings Fabricated by Laser Cladding: A Two-Dimensional Phase-Field Study." Coatings 13, no. 2 (2023): 432. http://dx.doi.org/10.3390/coatings13020432.

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During the process of laser cladding IN718/WC composite coatings, the dissolution and metallurgical reaction of WC particles significantly influence the microstructures of the coatings. However, the limited experimental methods restrict direct observation and prevent a deep understanding of this complicated process. Therefore, a novel numerical model for the solidification process of IN718/WC composite coatings was proposed. The model was established with the coupled multi-phase-field model and lattice Boltzmann method. Different kinds of microstructure around WC particles were simulated by th

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Afshari, Mahmoud, Mehrdad Khandaei, and Reza Shoja Razavi. "Investigating the laser metal deposition of Inconel 718 superalloy using the numerical and experimental methods." Laser Physics 32, no. 12 (2022): 126002. http://dx.doi.org/10.1088/1555-6611/ac9ec1.

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Abstract In this research, a volume of fluid (VOF) model was developed to investigate the effect of laser deposition parameters on the geometry of molten pool and deposited layer in the Inconel 718 superalloy. For this purpose, the process parameters of laser power, laser beam diameter and scanning speed were considered to estimate the geometric characteristics of the molten pool and deposited layer. In the following, the laser deposition process of Inconel 718 superalloy was carried out experimentally to validate the results of simulation. It was observed that an increase in the laser power f

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Wang, Xiang Jie, Jian Zhong Cui, and Qing Feng Zhu. "Effects of Low Frequency Electromagnetic Field on the Solidification Structure of 6063 Aluminum Alloy during Hot-Top Casting." Materials Science Forum 675-677 (February 2011): 857–60. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.857.

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Low frequency electromagnetic (LFE) field was applied during the conventional hot-top casting process. Thermocouples were used to measure the cooling curves from the border to the center of the ingot during steady-state of casting process, cooling curves were obtained, and effects of low frequency electromagnetic field on the solidification, macrostructure during the conventional hot-top casting for 6063 aluminum alloy process were analyzed. The experimental results show that the forced convection caused by the low frequency electromagnetic (LFE) filed can make the melt temperature uniform, pr

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Le, Trong-Nhan, and Yu-Lung Lo. "Effects of sulfur concentration and Marangoni convection on melt-pool formation in transition mode of selective laser melting process." Materials & Design 179 (October 2019): 107866. http://dx.doi.org/10.1016/j.matdes.2019.107866.

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Dubey, Pawan Kumar, Aditya Bandopadhyay, Indranil Manna, and Suman Chakraborty. "Role of melt pool convection in optimising defect free components fabricated via laser powder bed fusion of CuSn alloy." Applied Thermal Engineering 268 (June 2025): 125876. https://doi.org/10.1016/j.applthermaleng.2025.125876.

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Li, Ying, and Yongjun Shi. "Study on the dilution mechanism of laser-cladding AlCoCrFeNi high-entropy alloy coatings." Journal of Physics: Conference Series 2842, no. 1 (2024): 012012. http://dx.doi.org/10.1088/1742-6596/2842/1/012012.

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Abstract High-performance AlCoCrFeNi high-entropy alloy (HEA) coating is manufactured by employing laser cladding to enhance the wear-resistant properties of 45# steel. Finite element simulations and experiments are combined to examine the effects of dilution rate on coating properties. The findings demonstrate that the rate of dilution increases as the speed of the laser scan increases, leading to a noticeably greater Fe concentration in the coating. Due to the low solidification rate at 4 mm/s, a moderate convection can be formed, which leaves the Fe content comparable to that of the other e

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