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weld pool shape

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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001431
EISBN: 978-1-62708-173-3
... Abstract This article focuses on the tests for evaluating the weldability, cracking susceptibility, weld pool shape, fluid flow, and weld penetration of base materials. These tests include different types of self-restraint tests, externally loaded tests for evaluating cracking susceptibility...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001338
EISBN: 978-1-62708-173-3
... a comparison of casting and welding solidification. The constitutional supercooling model for describing weld solidification is presented because it qualitatively describes the evolution of different weld microstructures. The article describes the welding rate effect on weld pool shape and microstructure...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001336
EISBN: 978-1-62708-173-3
... welding parameter that determines pool shape, events at the anode can only be controlled indirectly by controlling the cathode. Anode spot stability does depend somewhat on shielding gas composition and the shape of the anode (that is, weld groove). Current density and heat input measurements...
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Published: 01 January 1993
Fig. 9 Effect of electrode tip geometry and shielding gas composition on weld pool shape for spot-on-plate welds. Welding parameters: current, 150 A; duration, 2 s More
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Published: 31 October 2011
Fig. 9 Effect of electrode tip geometry and shielding gas composition on weld pool shape for spot-on-plate welds. Welding parameters: current, 150 A; duration, 2 s More
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Published: 01 November 2010
Fig. 3 Calculated temperature isotherms during welding of low-alloy steels are shown in image and contour plots. The plots demonstrate the change of weld pool shape with an increase in welding speed from 1 to 5 mm/s More
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Published: 31 October 2011
Fig. 3 Calculated temperature isotherms during welding of low-alloy steels are shown in image and contour plots. The plots demonstrate the change of weld pool shape with an increase in welding speed from 1 to 5 mm/s More
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Published: 01 January 1993
Fig. 17 Silicone rubber replication technique used to evaluate decanted weld pool shape. Source: Ref 21 More
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001334
EISBN: 978-1-62708-173-3
... and is related to the formation of a variety of weld defects. Moving liquid transports heat and often dominates heat transport in the weld pool. Because heat transport by mass flow depends on the direction and speed of fluid motion, weld pool shape can differ dramatically from that predicted by conductive heat...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005579
EISBN: 978-1-62708-174-0
... of a variety of weld defects. Moving liquid transports heat and often dominates heat transport in the weld pool. Because heat transport by mass flow depends on the direction and speed of fluid motion, weld pool shape can differ dramatically from that predicted by conductive heat flow. Temperature gradients...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005664
EISBN: 978-1-62708-174-0
...% of the energy going into the weld pool, thus making current density the single most important welding parameter that determines pool shape. However, events at the anode can only be controlled indirectly by controlling the cathode. Anode spot stability does depend somewhat on shielding gas composition...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005524
EISBN: 978-1-62708-197-9
... of each subprocess model that is indicated as part of the integrated weld modeling shown in Fig. 2 . Most of the materials presented in this review have been adopted from Ref 40 . Process Modeling The goal of process modeling is to predict weld pool shape, thermal cycles, and fluid flow...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005561
EISBN: 978-1-62708-174-0
... of the materials presented in this review have been adopted from Ref 40 . Process Modeling The goal of process modeling is to predict weld pool shape, thermal cycles, and fluid flow conditions under transient (coordinate system fixed to the part) or steady-state (coordinate system moving with the welding...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005587
EISBN: 978-1-62708-174-0
... region. Goldak et al. ( Ref 12 ) proposed a truncated Gaussian distributed heat source in a double-ellipsoid region. More-complex weld-pool shapes can be approximated by superimposing distributed heat sources. Various phenomena can be introduced into these heat-source models, such as radiation...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001480
EISBN: 978-1-62708-173-3
... point in the weld-pool region. Goldak et al. ( Ref 12 ) proposed a truncated Gaussian distributed heat source in a double ellipsoid region. More-complex weld-pool shapes can be approximated by superimposing distributed heat sources. Various phenomena can be introduced into these heat-source...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005636
EISBN: 978-1-62708-174-0
..., and they determine the final weld quality and performance ( Ref 1 , Ref 2 , 3 ). The heat and mass transfer in the weld pool directly affect the size and shape of the pool, the solidification microstructure, the formation of weld defects such as porosity and humping, and the temperature distribution in the fusion...
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Published: 01 January 1993
Effect of welding parameters on weld metal pool shape Parameter Effect of parameter increase on weld-metal pool dimension (a) Pool width ( w ) Pool depth ( h ) Form factor ( F = w / h ) Current or wire-feed speed:  Low values A A B  High values D A D Voltage A B More
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Published: 01 January 1993
Fig. 13 Schematic showing effect of heat input and welding speed variations on weld grain structure. (a) Low heat input and low welding speed, producing an elliptical weld pool. (b) High heat input and high welding speed, producing a tear-drop-shaped weld pool. Here, the heat input and welding More
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005611
EISBN: 978-1-62708-174-0
... with a Split Beam Two-pool welding is applied in mass production on radial welds. The disk-shaped damper assemblies are rotated underneath the EB, which switches back and forth from the outer to the inner joint, thereby welding both joints “quasi” at the same time ( Fig. 16 ). The parallel processing...
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Published: 01 November 2010
of predicted shape and size of the weld pool and the heat-affected zone for various welding process conditions show good agreement. Note the ability of these calculations to predict a change in curvature of the weld pool as one moves from top cap to the root of the weld. Such curvatures cannot be predicted More