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multiple-pool welding

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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
... study. The control of the essential variables of dynamic beam deflection is also reviewed. The article also includes information on the applications of high-frequency multibeam processes, namely, selective surface treatment, multiple-pool welding, and pre- and post-heat treating. References...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005553
EISBN: 978-1-62708-174-0
... are subtracted from the respective reference values, processed through proportional-plus-integral controllers, and added to the final values obtained from the setpoint sequencer. Ref 107 Fig. 1 Typical weld pool-heat source interaction time. Source: Ref 4 Fig. 5 A self-organizing fuzzy...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001371
EISBN: 978-1-62708-173-3
... output of the welding power supply. Boundary D represents the limit of electrode feed rate at which the wire electrode melts by ohmic heating. Source: Ref 14 Fig. 15 Schematics comparing primary components of two vertical welding processes in which molten weld pools are confined by cooling...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005591
EISBN: 978-1-62708-174-0
... type for narrow-gap improved electroslag welding. Source: Ref 34 Fig. 7 Effect of increase in welding parameters on weld pool form factor. (a) Optimum weld pool dimensions (shallow weld pool, high form factor, acute angle between grains). (b) Undesirable weld pool dimensions (deep weld pool...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005513
EISBN: 978-1-62708-197-9
..., multiple layers are deposited atop the substrate, and each layer causes a thermal cycle in the adjoining layers below. In the initial layers, the melt pool thermal energy can diffuse into the substrate, which acts as an efficient heat sink due to its size. As the deposit is built up, the new layer...
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
...: Ref 7 Fig. 5 Plot of electron beam weld pool ratio ( d / w ) versus electron beam power density for low-sulfur (20 ppm) and high-sulfur (>120 ppm) type 304L stainless steel. Keyhole formation begins at approximately 2 × 10 3 W/mm 2 . Fig. 6 Schematic showing typical fluid flow...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001339
EISBN: 978-1-62708-173-3
... deoxidant concentration. Source: Ref 20 Abstract Abstract Fluxes are added to the welding environment to improve arc stability, to provide a slag, to add alloying elements, and to refine the weld pool. This article describes the effect of oxygen that directly reacts with alloying elements...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005638
EISBN: 978-1-62708-174-0
... the weld pool behind the laser ( Fig. 7 ). Fig. 7 Cross section of weld pool. Source: Ref 14 To protect the molten metal from the atmosphere, a shielding gas is necessary, akin to the MIG welding process. Helium is a common or the first choice of shield gas for CO 2 lasers (10.6 μm). Argon...
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
...), the maximum velocity magnitude is equal to 330 m/s (985 ft/s). Fig. 7 (a) Experimental weld pool geometry. The vertical line shows the joint of the two plates. (b) Calculated temperature and velocity fields in the weld pool. The contours represent the temperatures in degrees Kelvin, and the vectors...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005571
EISBN: 978-1-62708-174-0
... deviation is caused by variations in the activity coefficients with increasing deoxidant concentration. Source: Ref 20 Abstract Abstract Fluxes are added to the welding environment to improve arc stability, provide a slag, add alloying elements, and refine the weld pool. This article discusses...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006502
EISBN: 978-1-62708-207-5
... conductivity (heat difficult to be concentrated in the weld), and low viscosity in the melting state (unstable weld pool). In addition, many aluminum alloys contain magnesium or zinc, which are easily vaporized and thereby form a plasma that blocks the incident beam. Higher laser energy is required to melt...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006564
EISBN: 978-1-62708-290-7
..., and the created melt pool is at least an order of magnitude larger. In many ways, the laser DED process is identical to laser cladding and laser welding. Monitoring systems for these processes provide the same information needed for monitoring the fabrication of 3D structures using DED. Process monitoring has...
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
... pool chemistry. Fig. 7 Plot of weld d / w ratio versus sulfur content for approximately 200 heats of type 304L stainless steel. Each point is an average of multiple sulfur analyses and weld d / w ratio measurements. If single values are used, the scatter is greater. Source: Ref 10...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005639
EISBN: 978-1-62708-174-0
..., Defect and Diffusion Forum, 2001 , www.osti.gov 6. Mendez P.F. and Eagar T.W. , Estimation of the Characteristic Properties of Weld Pool during High Productivity Arc Welding , Mathematical Modelling of Weld Phenomena 5 ( Graz, Austria ), 1999 , p 68 7. Szekely J...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005566
EISBN: 978-1-62708-174-0
... square butted together with no edge bevel. Submerged arc welding is readily adapted to semiautomatic, machine automated, and fully automatic modes of operation. Multiple electrodes may be used in the same weld pool resulting in deposit rates unattainable by any other arc welding process...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005641
EISBN: 978-1-62708-174-0
... of total power with radius for a Gaussian beam. Source: Ref 19 Fig. 3 Schematic showing effect of convection on laser beam welding melt pool configuration. (a) Spherical shape with flat surface typical of low- Pr m materials. (b) Shallow and undercut free surface characteristic of high- Pr m...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006391
EISBN: 978-1-62708-192-4
.... Tech. , Vol 205 , 2010 , p 35 – 42 10.1016/j.surfcoat.2010.05.046 25. Guest S.D. , Chapuis J. , Wood G. , and Mendez P. , Non-wetting Behaviour of Tungsten Carbide Powders in Nickel Weld Pool: New Loss Mechanism in GMAW Overlays , Sci. Technol. Weld. Joi. , Vol 19...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001470
EISBN: 978-1-62708-173-3
... seam guidance, dynamic calculation of the amount of fill required, and location of the part and weld joint for purposes of robot orientation. A charge-coupled device (CCD) video camera provides information that can be used to determine weld pool size and shape, welding joint guidance ( Fig. 9...
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
... Fig. 1 Finite-element mesh for a weld described in a Eulerian reference frame. Note that filler metal is added. The weld pool, which is not shown, is not needed in this analysis because the temperature is prescribed at the weld-pool boundary. The mesh is finest just in front of the weld pool...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001465
EISBN: 978-1-62708-173-3
... are cooling and fluid flow within the weld pool. In addition, certain other effects can be evident, including the deformation of the weld pool that occurs due to absence of gravity in the space environment. In the latter case, large weld pools in through-penetration or out-of-position welds will not droop...