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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The onset of pipewall failure during "in-service" welding of gas pipelines
TL;DR: In this article, a numerical model was used to predict pipe-wall failure for circumferential fillet and longitudinal welds using a thermo-elastic plastic analysis, and the prediction of burn-through has been achieved using thermoelastoplastic model.
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Differences in microstructure and nano-hardness of selective laser melted Inconel 718 single tracks under various melting modes of molten pool
TL;DR: In this article, the authors investigated the influence of the melting mode of Inconel 718 single tracks on their solidification behavior, microstructure and nano-hardness, and the results indicated that the typical melting modes of molten pools, including the keyhole and conduction modes, can be obtained.
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The influence of cooling rate on the microstructure of stainless steel alloys
TL;DR: In this paper, the influence of cooling rate on a series of seven ternary alloys which span the line of two-fold saturation in the Fe-Ni-Cr system was explored.
Journal ArticleDOI
Thermoelastic interaction in a magneto-thermoelastic rod with memory-dependent derivative due to the presence of moving heat source
TL;DR: In this paper, the transient phenomena due to the influence of an induced magnetic field and the presence of moving heat source in a thermoelastic rod in the context of the Lord-Shulman (LS) theory of generalized thermelasticity have been investigated.
Journal ArticleDOI
Study of the gaussian distribution heat source model applied to numerical thermal simulations of TIG welding processes
TL;DR: In this article, the accuracy of the Gaussian heat source model is investigated in bead-on-plate welding by the TIG process, considering the convection and the radiation phenomena.
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.
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.