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laser surface melting

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Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005808
EISBN: 978-1-62708-165-8
..., laser surface heat treatment, laser surface melting such as skin melting or glazing, laser direct metal deposition such as cladding, alloying, and hardfacing, laser physical vapor deposition, and laser shock peening. The article provides detailed information on absorptivity, laser scanning technology...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006421
EISBN: 978-1-62708-192-4
... to improve tribological performance of structural materials in lubricated and nonlubricated environments. It discusses the fundamentals of various laser materials interactions and reviews laser-based surface-modification strategies, including laser surface heating and melting, laser-synthesized coatings...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003681
EISBN: 978-1-62708-182-5
... kilovolt to megavolt ion accelerating potentials. The second method, laser processing, is high-power laser melting with or without mixing of materials precoated on the substrate, followed by rapid melt quenching. The article also describes the advantages and disadvantages of the surface modification...
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
... treatment surfacing trepanning LASER BEAM MACHINING (LBM) removes, melts, or thermally modifies a material by focusing a coherent beam of monochromatic light on the workpiece. The LBM process does not involve mass material removal, but does provide rapid material removal with an easily controlled...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005771
EISBN: 978-1-62708-165-8
... Hardening of Steels” in this Volume. Laser surface heat treatment is widely used to harden localized areas of steel and cast iron machine components. This process is sometimes referred to as laser transformation hardening to differentiate it from laser surface melting phenomena ( Fig. 9...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001311
EISBN: 978-1-62708-170-2
... is distance. The temperature gradient is related to the power density and the solidification rate is related to the traverse speed or pulse length. Energy beam surface melting has been carried out using electron beams of powers similar to those commonly used for welding and a variety of lasers, the most...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006563
EISBN: 978-1-62708-290-7
... of surfaces of selective laser sintered (SLS) samples with varying amounts of carbon additive: (a) pure silica, (b) silica + 0.1 wt% carbon, (c) silica + 0.2 wt% carbon, and (d) silica + 0.3 wt% carbon. Source: Ref 93 Fig. 3 Selective laser melt (SLM) process scanning strategy: (a) zigzag and (b...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001303
EISBN: 978-1-62708-170-2
... electroless plating electroplating erosion resistance finishing flame hardening fused dry-resin coatings gray iron hardfacing hot dip coating induction hardening iron castings laser surface processing mechanical cleaning non-mechanical cleaning organic coatings pearlitic malleable iron...
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
... Conference Fig. 13 Schematic of coaxial probe laser that is triangulated to calculate the distance from deposition head to melt pool surface. Adapted from Ref 25 Fig. 2 Optical camera and flash lamps are installed in a standard laser powder-bed fusion system. Proximity sensors are used...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006556
EISBN: 978-1-62708-290-7
... karat yellow gold, 20 μm / 200-400 mm/s. Source: Ref 30. Reprinted by permission from The Santa Fe Symposium on Jewelry Manufacturing Technology Fig. 6 Comparison of the surfaces of laser-melted cobalt-chromium and a copper alloy build. Source: Ref 30. Reprinted by permission from The Santa Fe...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006581
EISBN: 978-1-62708-290-7
... simultaneously feeds powder or wire and delivers a concentrated energy source ( Ref 5 ). In this method, a melt pool is formed on the surface of the substrate or last-deposited layer by using a relatively high-powered laser, such as neodymium: yttrium-aluminum-garnet (Nd:YAG) or CO 2 , or other energy sources...
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
... be as a solid, liquid, or a mixture thereof. For example, in laser and electron beam deposition, the incoming material can be powder or wire, which is melted by the energy of the beam. The material enters into a melt pool, which solidifies to fuse with the substrate when the beam moves away. In spray forming...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006546
EISBN: 978-1-62708-290-7
... Effect of energy-to-melt ratio on ductility of laser-sintered polyamide 12 parts. Source: Ref 10 Fig. 8 Progression of coalescence of polymer particles as they melt and become liquid, which is described by the Frenkel-Eshelby model. Source: Ref 11 Fig. 9 Effect of sintering time...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006570
EISBN: 978-1-62708-290-7
... a phase change, surface and volume defects are likely present in a part fabricated by AM. The inevitable internal pores ( Fig. 1 ) are revealed by computed tomography (CT) x-ray scanning on a sample after selective laser melting (SLM). Anisotropic residual stress and shrinkage due to sintering...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006583
EISBN: 978-1-62708-290-7
... of Wall Thickness and Surface Morphology of Tungsten Thin Wall Parts by Adjusting Selective Laser Melting Parameters , J. Iron Steel Res. Int. , Vol 26 , 2019 , p 182 – 190 10.1007/s42243-019-00234-w 19. Enneti R.K. , Prough K.C. , Wolfe T.A. , Klein A. , Studley N...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006543
EISBN: 978-1-62708-290-7
.... POWDER BED FUSION (PBF) of polymers is a collection of additive manufacturing (AM) processes that melt and fuse polymer in a powder bed. The general process for laser sintering using a scanning laser beam on the surface of the powder bed is illustrated in Fig. 1 . A thin layer of powder, ~100 μm...
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
... 3 autoprotective surface film that prevents further corrosion penetration. This thin Al 2 O 3 film oxidation also limits the benefit of oxidation with O 2 -assisted laser cutting. Similarly, the same film is also responsible for dross formation because of the much higher melting temperature...
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
... or geometry. Fig. 1 Comparison of thermal properties for select materials. (a) Melting point. (b) Thermal conductivity Fabrication Processes The primary mechanisms used in microjoining for medical device applications include resistance and laser welding. Both are capable of reliably creating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... is created by raking powder across the work area. The energy source (electron beam or laser beam) is programmed to deliver energy to the surface of the bed, melting or sintering the powder into the desired shape. Additional powder is raked across the work area, and the process is repeated to create a solid...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0009211
EISBN: 978-1-62708-194-8
.... The energy source (electron beam or laser beam) is programmed to deliver energy to the surface of the bed, melting or sintering the powder into the desired shape. Additional powder is raked across the work area, and the process is repeated to create a solid three-dimensional component. The advantages...