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laser beam welding
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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005627
EISBN: 978-1-62708-174-0
... Abstract This article provides a history of electron and laser beam welding, discusses the properties of electrons and photons used for welding, and contrasts electron and laser beam welding. It presents a comparison of the electron and laser beam welding processes. The article also illustrates...
Abstract
This article provides a history of electron and laser beam welding, discusses the properties of electrons and photons used for welding, and contrasts electron and laser beam welding. It presents a comparison of the electron and laser beam welding processes. The article also illustrates constant power density boundaries, showing the relationship between the focused beam diameter and the absorbed beam power for approximate regions of keyhole-mode welding, conduction-mode welding, cutting, and drilling.
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
... Abstract This article provides an overview of the fundamentals, mechanisms, process physics, advantages, and limitations of laser beam welding. It describes the independent and dependent process variables in view of their role in procedure development and process selection. The article includes...
Abstract
This article provides an overview of the fundamentals, mechanisms, process physics, advantages, and limitations of laser beam welding. It describes the independent and dependent process variables in view of their role in procedure development and process selection. The article includes information on independent process variables such as incident laser beam power and diameter, laser beam spatial distribution, traverse speed, shielding gas, depth of focus and focal position, weld design, and gap size. Dependent variables, including depth of penetration, microstructure and mechanical properties of laser-welded joints, and weld pool geometry, are discussed. The article also reviews the various injuries and electrical and chemical hazards associated with laser beam welding.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001445
EISBN: 978-1-62708-173-3
... Abstract Laser-beam welding (LBW) is a joining process that produces coalescence of material with the heat obtained from the application of a concentrated coherent light beam impinging upon the surface to be welded. This article describes the steps that must be considered when selecting the LBW...
Abstract
Laser-beam welding (LBW) is a joining process that produces coalescence of material with the heat obtained from the application of a concentrated coherent light beam impinging upon the surface to be welded. This article describes the steps that must be considered when selecting the LBW process. It reviews the individual process variables that influence procedure development of the LBW process. Joint design and special practices related to LBW are discussed. The article concludes with a discussion on the use of consumables and special welding practices.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001370
EISBN: 978-1-62708-173-3
... Abstract Laser-beam welding (LBW) uses a moving high-density coherent optical energy source, called laser, as the source of heat. This article discusses the advantages and limitations of LBW and tabulates energy consumption and efficiency of LBW relative to other selected welding processes...
Abstract
Laser-beam welding (LBW) uses a moving high-density coherent optical energy source, called laser, as the source of heat. This article discusses the advantages and limitations of LBW and tabulates energy consumption and efficiency of LBW relative to other selected welding processes. It provides information on the applications of microwelding with pulsed solid-state lasers. The article describes the modes of laser welding such as conduction-mode welding and deep-penetration-mode welding, as well as major independent process variables for laser welding, such as laser-beam power, laser-beam diameter, absorptivity, and traverse speed. It concludes with information on various hazards associated with LBW, including electrical hazards, eye hazards, and chemical hazards.
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Published: 31 October 2011
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 materials. Numbers in the figure identify specific regions
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Published: 30 November 2018
Fig. 1 Schematic of keyhole instability in laser beam welding. (a) Full development of keyhole and balance of forces. (b) Initial perturbation of keyhole through instability at rear molten wall. (c) Collapse of keyhole, entrapping metallic vapor within the root. (d) Reestablishment of full
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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005631
EISBN: 978-1-62708-174-0
... Abstract This article describes the joint preparation, fit-up and design of various types of laser beam weld joints: butt joint, lap joint, flange joint, kissing weld, and wire joint. It explains the use of consumables for laser welding and highlights the special laser welding practices...
Abstract
This article describes the joint preparation, fit-up and design of various types of laser beam weld joints: butt joint, lap joint, flange joint, kissing weld, and wire joint. It explains the use of consumables for laser welding and highlights the special laser welding practices of steel, aluminum, and titanium engineering alloys. Laser weld quality and quality assessment are described with summaries of imperfections and how its operations contribute to providing repeatable and reliable laser welds. Relevant laser weld quality specifications are listed.
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Published: 31 October 2011
Fig. 16 Schematic illustrations of the (a) electron beam welding and (b) laser beam welding processes. The former is virtually always operated in a hard vacuum, while the latter can operate in air, in an inert gas atmosphere, or in vacuum. Source: Ref 2
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Published: 31 October 2011
Fig. 2 Joint designs for laser beam welds on wire. Arrows show direction of laser beam. (a) Butt weld. (b) Round-to-round lap weld. (c) Cross-joint weld. (d) Spot weld for T-joint. (e) Terminal or lug weld
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Published: 30 November 2018
Fig. 8 Joint designs for laser beam welds on wire. Arrows show direction of laser beam. (a) Butt weld. (b) Round-to-round lap weld. (c) Cross-joint weld. (d) Spot weld for T-joint. (e) Terminal or lug weld
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in Procedure Development and Practice Considerations for Laser-Beam Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 10 Joint designs for laser-beam welds on wire. Arrows show direction of laser beam. (a) Butt weld. (b) Round-to-round lap weld. (c) Cross-joint weld. (d) Spot weld for T-joint. (e) Terminal or lug weld
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Published: 31 October 2011
Fig. 10 Transverse profiles as a function of focus position for a laser-beam-welded type 310 stainless steel. Negative and positive numbers indicate position of the focal point below and above, respectively, the surface of the plate. Beam power, 5 kW; traverse welding speed, 16 mm/s (38
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Published: 31 October 2011
Fig. 1 Joint designs for laser beam welds on sheet metal. Arrows show direction of laser beam. Source: Ref 1
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Published: 30 November 2018
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Published: 30 November 2018
Fig. 7 Joint designs for laser beam welds on sheet metal. Arrows show direction of laser beam. Source: Ref 20
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Published: 01 January 1993
Fig. 20 S / N fatigue curves for laser-beam welds in 4 mm (0.16 in.) Ti-6Al-4V sheet produced at 2 and 4 m/min (0.6 and 1.2 ft/min). Tested in as-welded condition. Fracture initiated at weld undercut. Base metal properties are provided for comparative purposes. Source: Ref 39
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Published: 01 January 1993
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in Procedure Development and Practice Considerations for Laser-Beam Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 3 Transverse profiles as a function of focus position for a laser-beam welded type 310 stainless steel. Negative and positive numbers indicate position of focal point below and above, respectively, surface of plate. Beam power, 5 kW. Traverse welding speed, 16 mm/s (38 in./min). Source
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in Procedure Development and Practice Considerations for Laser-Beam Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 9 Joint designs for laser-beam welds on sheet metal. Arrows show direction of laser beam. Source: Ref 23
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Published: 01 January 1993
Fig. 9 Microstructures of laser-beam-welded austenitic stainless steels. (a) Gas-tungsten arc weld shown on left, with CO 2 laser-beam weld shown on right, in alloy of Cr eq /Ni eq = 1.8. Laser-beam weld on right is single-phase austenite formed as a product of massive transformation. (b
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