1-20 of 486 Search Results for

focused beam diameter

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... 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. absorbed beam power conduction-mode welding cutting drilling electron beam...
Image
Published: 31 October 2011
Fig. 4 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 More
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
... and working distance by controlling the beam diameter. Thus, a working knowledge of the focusing optics is important for an engineer developing the laser welding process. Important formulae related to the laser as a welding tool will be summarized in following subsections dealing with process variables...
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 the substrate, its surface condition, and the laser beam wavelength. Therefore, the most common practice for process development with a given laser and material is the selection of focusing optics for optimum power density and working distance by controlling the beam diameter. Thus, a working knowledge...
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
... with a given laser and material is the selection of focusing optics for optimum power density and working distance by controlling the beam diameter. Thus, a working knowledge of the focusing optics is important for an engineer developing the laser welding process. Important formulas related to the laser...
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
... are discussed in the section “Hybrid Laser Welding Parameters” in this article, while specific variables for the LBW process (discussed in other articles in this Volume) include: Laser power (typically from 200 W to 20 kW) Diameter of the focused laser beam (spot size typically 0.2 to 1 mm, or 0.008...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002167
EISBN: 978-1-62708-188-7
... Abstract Electron beam machining (EBM) uses a focused beam of high-velocity electrons to remove material. This article provides a description of equipment used for EBM and discusses the process characteristics, applications, advantages, and disadvantages of electron beam drilling...
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
... diameter for visible and near-infrared wavelength lasers at ∼10 μm ( Ref 24 ). In the case of electron beams, high-quality SEM or electron probe microanalysis instruments routinely focus their probe beams to a diameter < 1 nm. The several-watt electron beams needed for microwelding cannot be focused...
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
... small size of the focused beam spot on the workpiece, typically 0.25 to 0.50 mm (0.010 to 0.020 in.) in diameter, such as for multikilowatt lasers for macrofabrication. The width of the kerf is of the same order of magnitude as the diameter of the beam spot on the workpiece. Consequently, the benefits...
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...
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: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006471
EISBN: 978-1-62708-190-0
... and through-transmission inspection can be performed. The construction of a conventional immersion-type search unit is shown in Fig. 6(e) and examples of such are shown in Fig. 11(a) . Focused transducers can be cylindrically or spherically focused, as illustrated in Fig. 11(b) . The beam from...
Book Chapter

Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006474
EISBN: 978-1-62708-190-0
... ultrasonic transducer (in some cases more than 20 cm, or 8 in., in diameter) to generate plane waves, which provide the ultrasonic illumination, and then uses liquid-surface holography, through the interaction with a beam from a reference transducer, to convert the sonic image into a wave pattern...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006677
EISBN: 978-1-62708-213-6
... Abstract This article is intended to provide the reader with a good understanding of the underlying science, technology, and the most common applications of focused ion beam (FIB) instruments. It begins with a survey of the various types of FIB instruments and their configurations, discusses...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005610
EISBN: 978-1-62708-174-0
..., defined in terms of specific quantifiable parameters, such as the beam diameter and power density distribution, at this sharp focus setting can vary significantly with different operators, machines, and operating conditions. The use of diagnostic tools for probing the beam characteristics has been...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003042
EISBN: 978-1-62708-200-6
... for cutting for two reasons: They produce large amounts of power in the form of light and they produce this light in parallel beams that can be focused to small spots. Focusing Laser Beams 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...
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
... A focusing lens is used to focus the beam 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...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005615
EISBN: 978-1-62708-174-0
... applied to the gun. Electrons then pass down through the electron beam column assembly and into the field of an electromagnetic focusing coil (a magnetic lens). This focusing lens reduces the diameter of the electron beam as it continues in its passage and focuses the stream of electrons down to a much...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001421
EISBN: 978-1-62708-173-3
... with variations in heat input, and it was shown to be approximately the same size as the focused beam diameter. This suggests that region I is associated with the high temperatures of the weld keyhole, where the beam and material interact. Fig. 3 Microstructure of CO 2 laser-beam weld on A356/SiC/15 p...
Book Chapter

Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001369
EISBN: 978-1-62708-173-3
... the operating voltage being applied to the gun. Electrons then pass down through the electron beam column assembly and into the field of an electromagnetic focusing coil (a magnetic lens). This focusing lens reduces the diameter of the electron beam, as it continues in its passage, and focuses the stream...