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laser beam output

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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005618
EISBN: 978-1-62708-174-0
...-peening processes of which emphasis is placed on thermal laser cutting. It details the principal set-up parameters, such as the laser beam output, nozzle design, focusing optic position and characteristics, assist gases, surface conditions, and cutting speed. A discussion on the types of gas, supply...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006545
EISBN: 978-1-62708-290-7
... for welding was not realized until the mid-1950s ( Ref 47 ). As such, both are relatively modern processing tools. E-beam processing shares many similarities with laser-based processes. Both can output intensities exceeding gigawatts per square meter and can be used in AM of very small features on the order...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002168
EISBN: 978-1-62708-188-7
... Abstract Laser beam machining removes, melts, or thermally modifies a material by focusing a coherent beam of monochromatic light on the workpiece. This article describes the principal lasers used in metal processing: neodymium-glass, carbon dioxide, and neodymium-doped yttrium aluminum garnet...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005600
EISBN: 978-1-62708-174-0
... of complex contours and flexibility for welding multiple-part designs. The Nd:YAG lasers are typically limited to 6 kW or less in output power. Due to the inherent characteristics of the technology, Nd:YAG lasers exhibit poor beam quality and therefore have limited power density. Lamp-pumped Nd:YAG...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005630
EISBN: 978-1-62708-174-0
... Abstract Properly designed beam-delivery optics is essential to quality of the beam acting on the workpiece and to the economics of the manufacturing process. This article describes the design considerations of laser beam delivery optics. It also reviews the manufacturing economics and presents...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001398
EISBN: 978-1-62708-173-3
... Abstract Laser soldering uses a well-focused, highly controlled beam to deliver energy to a desired location for a precisely measured length of time. This article focuses on two types of laser soldering operations, namely, blind laser soldering and intelligent laser soldering. It discusses...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003200
EISBN: 978-1-62708-199-3
..., can be used for transformation surface hardening. The primary output beam from the laser rarely is used in metalworking applications. Instead, the output beam is directed and shaped by optical systems to generate a laser spot of the desired size and shape on the workpiece surface...
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...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005106
EISBN: 978-1-62708-186-3
... on the workpiece. This increases the power density of the beam. The lens is used because the output beam of a laser is typically 11 to 21 mm ( 7 16 to 13 16 in.) in diameter and does not possess enough energy per unit area to melt and vaporize materials. The lens can focus the beam to a spot...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001481
EISBN: 978-1-62708-173-3
... determination of the Gaussian width parameter, r ′, depends on the optics of the laser-or electron-beam welding system. In many cases, a point source on the surface is an excellent approximation. In laser-beam welding, if the energy is delivered via a fiber-optic system, then the output source distribution...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003042
EISBN: 978-1-62708-200-6
... cutting flutes produces a fuzz-free countersink edge. This configuration is shown in Fig. 12 . Fig. 12 Optimal countersink drill for aramid composites A CO 2 laser with an output of 1500 W generally emits a beam about 20 mm (0.8 in.) in diameter. The power density in this unfocused beam...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006466
EISBN: 978-1-62708-190-0
.... , Material Characterization by Line-Focus-Beam Acoustic Microscope , Trans. IEEE , Vol SU-32 , 1985 , p 189 – 212 16. Oishi M. , Noguchi K. , Masaki T. , and Mizushina M. , Defect Characterization of Tetragonal Zirconia Polycrystals by a Scanning Laser Acoustic Microscope...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005603
EISBN: 978-1-62708-174-0
...: yttrium-aluminum-garnet or ytterbium-fiber laser, then the output source distribution is often described as a truncated Gaussian source distribution or “top hat” of specified width. Shown in Fig. 10 are measured distributions for ytterbium-fiber laser beams delivered through a fiber optic...
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
... output power with the power delivered at the substrate. There is often a measurable loss due to the reflective and transmissive optics used to deliver the beam from the laser to the workpiece. For systems with fiber delivery, input coupling is often responsible for part of this loss. Fibers also scramble...
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
... Abstract Most welding lasers fall into the category of fiber, disc, or direct diode, all of which can be delivered by fiber optic. This article provides a comparison of the energy consumptions and efficiencies of laser beam welding (LBW) with other major welding processes. It discusses the two...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006575
EISBN: 978-1-62708-290-7
... strain, and a is the flow vector. Different AM processes use different heat sources to melt and deposit material. For example, a laser is used in a laser-engineered net shaping system, while the Sciaky system uses an electron beam. The physics of each heat source is different...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006460
EISBN: 978-1-62708-190-0
... broad independence regarding part shape and orientation of the part surface relative to the laser beam. The fact that ultrasound is emitted by the part itself, however, has the drawback that too high laser power or energy could cause undesirable damage. Also, transduction efficiency could be highly...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001732
EISBN: 978-1-62708-178-8
... lasers, although the increased emission signal is accompanied by an increase in light scatter and localized heating effects. In addition, the excitation beam often must be attenuated greatly to avoid photodecomposition of the sample constituents. Lasers are frequently used for time-resolved fluorimetry...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005680
EISBN: 978-1-62708-198-6
... the high-intensity beam to a single spot of high energy density ( Ref 13 , 16 ). A laser system consists of three main components: an amplifying medium, a means of exciting the medium to its amplifying state or pump source, and an optical resonator ( Ref 10 ). The active medium is comprised of materials...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005572
EISBN: 978-1-62708-174-0
... penetration than electrode negative polarity. DCEP, direct current electrode positive; DCEN, direct current electrode negative. Courtesy of Edison Welding Institute Hybrid laser GMAW is a process variation in which laser beam delivery optics are integrated with a GMAW gun. Higher productivities...