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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Sensitivity analysis for process parameters influencing electric arc cutting
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The structural integrity of high-strength welded pipeline steels: a review
TL;DR: In this article, a literature review is conducted on key issues related to the structural integrity of pipeline steel welds, including the role of brittle microstructure phases and hard secondary particles present in the matrix.
Book ChapterDOI
On the Use of Data Mining Techniques to Build High-Density, Additively-Manufactured Parts
TL;DR: This chapter shows how it can combine simple simulations and experiments to iteratively constrain the design space of parameters, and quickly and efficiently identify parameters to create parts with \(>\)99 % density.
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Modelling the influence of process parameters on precipitate formation in powder-bed fusion additive manufacturing of IN718
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Journal ArticleDOI
The size of the sensitization zone in 304 stainless steel welds
N. S. Tsai,Thomas W. Eagar +1 more
TL;DR: In this article, the size and shape of the sensitization zone in 304 stainless steel welds have been studied through a statistically designed experiment, and the results indicate that the width of the sensitivity zone is in proportion to the magnitude of the heat input, except when very little fusion occurs.
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.