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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Numerical Simulation for Shaping Feature of Molten Pool in Twin-Arc Submerged Arc Welding
Kuanfang He,Jun Chen,Siwen Xiao +2 more
TL;DR: In this article, the authors proposed the notion of ratio of width to length to describe the shaping feature of twin-arc submerged arc welding accurately, and analyzed the law of molten pool variation and weld formation.
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Processing Parameters and Martensitic Phase Transformation Relationships in Near Defect-Free 3D Printed NiTiHf SMAs
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TL;DR: In this paper , a detailed printability assessment of NiTiHf HT-SMAs fabricated using laser powder bed fusion (LPBF) additive manufacturing is conducted for the first time, and the regions associated with lack of fusion, keyholing, and balling regimes are quantitatively classified through an efficient 3D-printability assessment framework.
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Prediction of Weld Joint Shape and Dimensions in Laser Welding Using a 3D Modeling and Experimental Validation
TL;DR: In this article, the authors presented an experimentally validated weld joint shape and dimensions predictive 3D modeling for low carbon galvanized steel in butt-joint configurations, which is based on metallurgical transformations using temperature dependent material properties and the enthalpy method.
Book ChapterDOI
The Analysis of Temporary Temperature Field and Phase Transformations in One-Side Butt-Welded Steel Flats
TL;DR: In this paper, the welding method applied for modelling the temperature field and phase transformations is presented, and three-dimensional and temporary temperature field for butt welding with thorough penetration is determined on the basis of analytical methods of an integral transformation and Green's function.
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Data mining for faster, interpretable solutions to inverse problems: A case study using additive manufacturing
TL;DR: This paper describes how a simple modification to the idea of tapering can substantially speed up the surrogate without losing accuracy in prediction and demonstrates that Kohonen self-organizing maps can be used to visualize and interpret the solution to the inverse problem in the high-dimensional input space.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.