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laser surface heating

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
... limitless because of the ability to deposit almost any material by vapor deposition and the ultrahigh heating and cooling rates of thin surface layers heated by electron and laser beams. This chapter describes some of the newer processes used to apply thermochemical modifications, coatings, and high-energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900305
EISBN: 978-1-62708-358-4
..., directed sources of heat and are used for many types of surface modification. As shown in Fig. 16-15 , depending on power input, high-energy laser beams can be used for a variety of applications, including cutting, welding, surface melting and alloying, and localized surface hardening ( Ref 3 , 55 - 58...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... Flame Hardening Induction Heating Laser Surface Heat Treatment Electron Beam (EB) Hardening Shell Hardening Natural Atmospheres Atmospheres Derived from Products of Combustion Exothermic Atmospheres Endothermic Atmospheres Nitrogen-Base Atmospheres Vacuum Atmospheres...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
... on surface metallurgy. hardness number quenchants laser melting shot peening surface hardening THE SURFACE-ENGINEERING TREATMENTS described in this chapter include selective surface hardening by flame, induction, or high-energy beam heating, laser melting and quenching, and shot peening. None...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... on the workpiece. Laser beam welding is a joining process that produces coalescence of materials with the heat obtained from the application of a concentrated coherent light beam impinging on the surfaces to be welded. The word laser is an acronym for “light amplification by stimulated emission of radiation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440159
EISBN: 978-1-62708-262-4
.... and Panzer S. , Electron Beam Surface Hardening , Heat Treating , Vol 4 , ASM Handbook , ASM International , 1991 , p 297 – 311 7. Sandven O.A. , Laser Surface Hardening , Heat Treating , Vol 4 , ASM Handbook , ASM International , 1991 , p 286 – 296 Hardened Zones in Low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110144
EISBN: 978-1-62708-247-1
... temperature and preventing heat absorption and metallization sputtering. [5] Figure 5 Decapsulation of laser-ablated PBGA microcircuit using downstream microwave plasma. This takes about two hours on an older 300-watt system, and less than 20 minutes on the newer 500-watt systems. [6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... of materials with the heat obtained from the application of a concentrated coherent light beam impinging upon the surfaces to be welded. The word laser is an acronym for light amplification by stimulated emission of radiation . The laser is a unique source of thermal energy, precisely controllable...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120079
EISBN: 978-1-62708-269-3
... 0.50 1020 40 Contour 25 1.0 380 15 (b) Contour 50 2.0 130 5 (b) (a) Data are based on use of a continuous wave CO 2 laser with an oxygen assist. (b) 16 kW (21 hp) laser was used. Source: Metcut Research Associates Inc. Fig. 10.4 Laser beam heating of titanium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250001
EISBN: 978-1-62708-345-4
... type of stress raiser is present at the surface. This is not so with through hardened or non-heat treated parts since the strength is uniform throughout the part. Under this condition, torsional tensile failure is expected to originate at the surface. In most instances of torsional failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110042
EISBN: 978-1-62708-247-1
... Laser Scanning Microscope (LSM) forms an image by detecting reflections from a raster scanned laser. The example is a backside image showing interference lines caused by laser light waves reflecting from both surfaces of the die, which causes destructive and constructive interference. Figure 37...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110524
EISBN: 978-1-62708-247-1
..., the Miller crystal index directions are shown. Fig 5 Growth of a ❬110❭ DLD in a typical stripe laser. Fig 6 TEM of microloops from a gradually-degraded sample. Image courtesy of Prof. Pierre Petroff [8] . Fig 7 Weak wirebond (right) may have only a small fraction of its surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... Localized surface hardening (flame, induction, laser, and electron-beam hardening) Improved wear resistance through the development of a hard martensitic surface Laser melting Improved wear resistance through grain refinement and the formation of fine dispersions of precipitates Shot peening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110196
EISBN: 978-1-62708-247-1
... to approximately 30µm and a separation of less than 0.1µm between the hottest spot and the laser beam. Finally, it was found that the temperature increases linearly with the laser power. Given sufficient time for the permanent regime to be established, the peak temperature variation induced by laser heating...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
... Other Stress-Relief Methods Austenitizing Quenching Tempering Austempering Metallurgical Aspects Applied Energy Surface Hardening Nitriding of Cast Irons Weathering Vibration Flame Hardening Induction Hardening Laser Heating Molten Salt Bath Cyaniding Ion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110153
EISBN: 978-1-62708-247-1
... removal method. Newer techniques use a pulsed laser referred to as Pulsed Laser Assisted Chemical Etch (PLACE) to reduce substrate heating. The technique is useful for small pocket access < 500 µm x 500 µm and more typically on the order of 50 µm x 50 µm. Surface finish is on the order of 30 nm RMS...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500317
EISBN: 978-1-62708-317-1
... Achievable surface hardness with flame or induction hardening. Source: Ref 16.37 In laser beam hardening, the workpiece is heated by absorbed energy of the laser ( Fig. 16.9 ). The heating rate may be on the order of 1000 °C/s (1800 °F/s), so the surface is heated up very quickly. Due to the high...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
.... , Laser Surface Heat Treatment , Chapter 3, Lasers in Surface Engineering , Dahotre N.B. , Ed., Surface Engineering Series , Vol 1 , ASM International , 1998 , p 69 – 70 7. Grum J. and Šturm R. , Characteristics of Laser Surface Melt-Hardening and of Optimizing the Process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110244
EISBN: 978-1-62708-247-1
...Laser wavelengths, respective absorption depth in Si, required SIL material for LVP, and expected resolution <xref rid="t91110244-ref45" ref-type="bibr">[45]</xref> Table 1 Laser wavelengths, respective absorption depth in Si, required SIL material for LVP, and expected resolution [45...