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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
... Abstract Fluid flow is important because it affects weld shape and is related to the formation of a variety of weld defects in gas tungsten arc (GTA) welds. This article describes the surface-tension-driven fluid flow model and its experimental observations. The effects of mass transport on arc...
Abstract
Fluid flow is important because it affects weld shape and is related to the formation of a variety of weld defects in gas tungsten arc (GTA) welds. This article describes the surface-tension-driven fluid flow model and its experimental observations. The effects of mass transport on arc plasma and weld pool are discussed. The article reviews the strategies for controlling poor and variable penetration and describes the formation of keyhole and fluid flow in electron beam and laser welds. It also explains the fluid flow in gas metal arc welding and submerged arc welding, presenting its transport equations.
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
... result in high-velocity fluid motion. Fluid flow velocities exceeding 1 m/s (3.3 ft/s) have been observed in gas tungsten arc (GTA) welds under ordinary welding conditions, and higher velocities have been measured in submerged arc welds. Fluid flow is important because it affects weld shape...
Abstract
High-velocity gas motion occurs in and around the arc during welding. This article describes the phenomena of gas flow in gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW). The effect of trace element impurities on GTA weld penetration of selected alloys is presented in a table. The article concludes with a discussion on submerged arc welding (SAW).
Book Chapter
Validation Strategies for Heat-Affected Zone and Fluid-Flow Calculations
Available to PurchaseSeries: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001482
EISBN: 978-1-62708-173-3
... strain history observed in the heat-affected zone of fusion welded materials. fluid-flow calculation free surface deformation fusion welded materials fusion welding heat affect zone liquid-vapor state solid-liquid state solid-solid state validation vapor-plasma state FUSION WELDING...
Abstract
Fusion welding processes involve four phase changes, namely, solid-solid state, solid-liquid, liquid-vapor, and vapor-plasma. Each has its own thermal, momentum, and stress history. This article discusses some important techniques to validate temperature, momentum, stress, and residual strain history observed in the heat-affected zone of fusion welded materials.
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Schematic showing surface fluid flow (top) and subsurface fluid flow (botto...
Available to PurchasePublished: 31 October 2011
Fig. 2 Schematic showing surface fluid flow (top) and subsurface fluid flow (bottom) in the weld pool. (a) Negative surface tension temperature coefficient (pure material). (b) Positive surface tension temperature coefficient (surface-active elements present)
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Schematic showing surface fluid flow (top) and subsurface fluid flow (botto...
Available to PurchasePublished: 01 January 1993
Fig. 2 Schematic showing surface fluid flow (top) and subsurface fluid flow (bottom) in the weld pool. (a) Negative surface tension temperature coefficient (pure material). (b) Positive surface tension temperature coefficient (surface-active elements present)
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Published: 01 August 2013
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Schematic illustrating fluid flow around right-angle and curved bends in a ...
Available to PurchasePublished: 01 December 2008
Fig. 7 Schematic illustrating fluid flow around right-angle and curved bends in a gating system. (a) Turbulence resulting from a sharp corner. (b) Metal damage resulting from a sharp corner. (c) Streamlined corner that minimizes turbulence and metal damage
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Simulated fluid flow in a steel continuous casting tundish with (a) a conve...
Available to PurchasePublished: 01 December 2008
Fig. 7 Simulated fluid flow in a steel continuous casting tundish with (a) a conventional baffle configuration and (b) a double weir and dam configuration. Source: Ref 26
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Published: 30 September 2015
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Simulated fluid flow at 50 s after cooling and macrosegregation in an Fe-0....
Available to PurchasePublished: 01 December 2008
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Simulated fluid flow at 400 s after cooling in a horizontally solidified Al...
Available to PurchasePublished: 01 December 2008
Fig. 7 Simulated fluid flow at 400 s after cooling in a horizontally solidified Al-4.4Cu casting
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Fluid-flow controlled microstructures in peritectic alloys. Solidification ...
Available to PurchasePublished: 01 December 2004
Fig. 58 Fluid-flow controlled microstructures in peritectic alloys. Solidification direction is upward. (a) Discrete bands of the two phases. (b) Partial bands or islands of one phase in the matrix of the other phase. (c) Single primary to peritectic phase transition. (d) Simultaneous growth
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Instantaneous velocity of fluid flow as a function of time and time-average...
Available to Purchase
in Computational Modeling of Induction Melting and Experimental Verification
> Induction Heating and Heat Treatment
Published: 09 June 2014
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Schematic showing typical fluid flow generated when butt welding two heats ...
Available to PurchasePublished: 31 October 2011
Fig. 6 Schematic showing typical fluid flow generated when butt welding two heats of material with different penetration characteristics. Source: Ref 9
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(a) Schematic of fluid flow that encourages humping. (b) Example of a humpe...
Available to PurchasePublished: 31 October 2011
Fig. 1 (a) Schematic of fluid flow that encourages humping. (b) Example of a humped laser bead. (c) Velocity ratio calculated as a function of keyhole diameter, weld speed of 1 m/s (3.3 ft/s), and 40 µm thick stainless steel foil. Source: Ref 23
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Phase-field simulation of dendritic growth in the presence of fluid flow. S...
Available to Purchase
in Formation of Microstructures, Grain Textures, and Defects during Solidification
> Metals Process Simulation
Published: 01 November 2010
Fig. 9 Phase-field simulation of dendritic growth in the presence of fluid flow. Source: Ref 99
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Schematic showing typical fluid flow generated when butt welding two heats ...
Available to PurchasePublished: 01 January 1993
Fig. 6 Schematic showing typical fluid flow generated when butt welding two heats of material with different penetration characteristics. Source: Ref 8
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Schematic representation of the fluid flow paths in an SRS suppressor with ...
Available to PurchasePublished: 15 December 2019
Fig. 2 Schematic representation of the fluid flow paths in an SRS suppressor with the yellow lines representing the eluent flow path and the black lines representing the separate and isolated regenerant flow path. The membranes are cation-exchange membranes in anion analysis and anion-exchange
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Typical boundary conditions in viscous heat-conducting fluid flow. Source: ...
Available to PurchasePublished: 01 December 2009
Fig. 16 Typical boundary conditions in viscous heat-conducting fluid flow. Source: Ref 1 with permission
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in Computational Modeling of Induction Melting and Experimental Verification
> Induction Heating and Heat Treatment
Published: 09 June 2014
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