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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Finite element analysis and experimental investigation of moving heat source model for GMAW deposited mild steel weld bead
Mohd. Aslam,Chinmaya Kumar Sahoo +1 more
TL;DR: In this paper , a numerical model was constructed to simulate the GMAW welding process through transient thermal analysis for different thermal heat source models for weld deposition of Mild steel considering semi-cylindrical weld bead geometry.
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Modeling and Control of Layer Height in Laser Wire Additive Manufacturing
TL;DR: In this paper , a physics-based model of the bead geometry including process parameters and material properties was developed for the laser wire additive manufacturing (LWAM) process of large-scale products.
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A rigorous test and improvement of the Eagar-Tsai model for melt pool characteristics in laser powder bed fusion additive manufacturing
Pejman Honarmandi,Raiyan Seede,Lei Xue,David Shoukr,P. Morcos,Bing Zhang,Chen Zhang,Alaa Elwany,Ibrahim Karaman,Raymundo Arroyave +9 more
TL;DR: In this paper, the Eagar-Tsai (E-T) model is used to predict melt pool characteristics during additive manufacturing (AM) in a systematic manner from an uncertainty quantification/propagation perspective.
Journal ArticleDOI
Heat transfer to a cathode of a rotating arc
TL;DR: In this article, a method to calculate spatiotemporal temperature development along the surface of tubular electrodes is proposed, which takes into account the heat prehistory of the electrode: the temperature field created by previous arc rotations.
Journal ArticleDOI
Laser-based additive manufacturing of a binary Ni-5 wt.%Nb alloy
TL;DR: In this article, Ni95Nb5 (wt. %) alloy samples are additively manufactured using selective laser melting (SLM) as a surrogate for Ni-based superalloys, and the results show that with the proper selection of process parameters, SLM can produce parts with consistent mechanical properties in a wide process parameter space in simple alloying systems.
References
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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.