Open AccessJournal Article
Temperature fields produced by traveling distributed heat sources
Thomas W. Eagar,N. S Tsai +1 more
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The solution of a traveling distributed heat source on a semi-infinite plate provides information about both the size and the shape of arc weld pools as mentioned in this paper, and the results indicate that both welding process variables (current, arc length and travel speed) and material parameters (thermal diffusivity) have significant effects on weld shape.Abstract:
The solution of a traveling distributed heat source on a semi-infinite plate provides information about both the size and the shape of arc weld pools. The results indicate that both welding process variables (current, arc length and travel speed) and material parameters (thermal diffusivity) have significant effects on weld shape. The theoretical predictions are compared with experimental results on carbon steels, stainless steel, titanium and aluminum with good agreement. 25 references, 23 figures, 1 table.read more
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A Bayesian Approach to the Eagar–Tsai Model for Melt Pool Geometry Prediction with Implications in Additive Manufacturing of Metals
TL;DR: In this article, a Bayesian inference is employed to predict distributions for the E-T model input parameters of laser absorptivity and powder bed porosity by incorporating experimental results into the analysis.
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A literature review in heat source thermal modeling applied to welding and similar processes
Ernandes José Gonçalves do Nascimento,Elisan dos Santos Magalhães,Luiz Eduardo dos Santos Paes +2 more
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Forming Mechanism of Weld Cross Section and Validating Thermal Analysis Results Based on the Maximal Temperature Field for Laser Welding
Youmin Rong,Jiajun Xu +1 more
TL;DR: In this paper , the forming mechanism of weld cross sections (WCSs) was studied via thermal analysis, and the melting was first dominated by heat convection from the flowing melt until the WCS had the max cross section in the transient temperature field, giving rise to an increase in middle width but a decrease in upper and bottom width.
Simulation des Flux Thermiques lors du soudage TIG et prédiction de la taille des zones du cordon dans les tôles d’Acier 304L, Partie B : Evolution 3D.
TL;DR: In this paper, a simulation tridimensionnelle du phenomene de transfert de la chaleur is used to solve the problem of soudage TIG, which concerne les toles d'acier inoxydable 304L.
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Melt Pool Shape Evaluation by Single-Track Experiments and Finite-Element Thermal Analysis: Balling and Lack of Fusion Criteria for Generating Process Window of Inconel738LC
Jun Katagiri,Masahiro Kusano,Satoshi Minamoto,Houichi Kitano,Koyo Daimaru,Masakazu Tsujii,Makoto Watanabe +6 more
TL;DR: In this article , a study of process window generation using single-track experiments and finite-element method simulation of thermal conduction for Inconel738LC alloy was conducted and validated by comparison with the experiments.
References
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Journal ArticleDOI
Heat treating and melting material with a scanning laser or electron beam
H. E. Cline,T. R. Anthony +1 more
TL;DR: In this paper, a thermal analysis for laser heating and melting materials is derived for a Gaussian source moving at a constant velocity, where the resulting temperature distribution, cooling rate distribution, and depth of melting are related to the laser spot size, velocity, and power level.
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Heat Intensity and Current Density Distributions at the Anode of High Current, Inert Gas Arcs
TL;DR: In this article, heat and current distributions at the anode of high current arcs in inert gas atmospheres were determined experimentally, and the experimental method consisted of splitting anode, measuring the heat flux and the current to one of the sections as a function of arc position relative to the splitting plane, and calculating therefrom the distribution functions.
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Analysis of Electrode Phenomena in the High-Current Arc
J. D. Cobine,E. E. Burger +1 more
TL;DR: In this article, the authors made an analysis of the phenomena at the electrodes of a high-current short-time arc and showed that the input power density to the anode spot is in the range 5×104 to 1×106 watts/cm2.
Convection in arc weld pools
TL;DR: In this paper, a mathematical model was developed to account for convection and temperature distributions in stationary arc weld pools driven by buoyancy, electromagnetic and surface tension forces, and it was shown that these forces dominate the flow behavior.
Effect of Selenium on GTAW Fusion Zone Geometry
C.R. Heiple,J.R. Roper +1 more
TL;DR: In this article, small additions of selenium to 21-6-9 stainless steel dramatically increase the depth/width ratio of bead-on-plate welds, which is consistent with a model for control of weld fusion zone geometry.