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laser etching

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Published: 30 November 2018
Fig. 33 Variation of average etch depth per pulse with increasing laser fluence for different wavelengths of laser. Adapted from Ref 66 More
Image
Published: 12 September 2022
Fig. 5 (a) Electron micrographs for acid-etched Co-Cr-Mo alloy after surface laser melting along the interface. Tribological results display (b) the normalized wear rate for commercially available CoCr alloy and treated samples and (c) the contact resistance values during tribological testing More
Image
Published: 31 October 2011
Fig. 23 Laser-drilling applications from macro to micro. (a) Turbine engine blades made of nickel alloy need drilled holes that serve as air-cooling channels to maintain their temperatures below melting temperature while in operation. Each hole is approximately 0.5 mm (0.02 in.) in diameter More
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
.... et al. , Appl. Phys. Lett. , Vol 51 , 1987 , p 2040 10.1063/1.98285 Appendix: Laser-Enhanced Etching Laser-enhanced etching is a photochemical process that generates micron-sized or submicron-sized patterns on the surfaces of metals, ceramics, and semiconductors. In this process...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009075
EISBN: 978-1-62708-177-1
... with transmitted light, some of the techniques can be very effectively used with reflected light. A technique that can be used with etch-relief surfaces is reflected-light (episcopic) differential interference contrast (DIC) such as Nomarski. This type of contrast technique distinguishes height differences...
Image
Published: 01 January 2003
Fig. 14 Dendritic solidification in laser-surface-melted type 304 stainless steel. (a) Surface replica of a polished-and-etched cross section. (b) Scanning electron micrograph of the free surface More
Image
Published: 01 October 2014
Fig. 24 Remelt-hardened and transition zones in a pearlitic iron after treatment with a 1.6 kW, 1.5 mm (0.06 in.) diam laser beam of 4.56 mm/s (0.18 in./s). Etched in picral. 50× More
Image
Published: 31 August 2017
Fig. 24 Remelt-hardened and transition zones in a pearlitic iron after treatment with a 1.6 kW, 1.5 mm (0.06 in.) diameter laser beam of 4.56 mm/s (0.18 in./s). Etched in picral. Original magnification: 50× More
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
... of nanograting could be formed. Most surface measuring techniques, except atomic force microscopy, do not have suitable resolution to detect such nanoscale features. It was reported that the ablative laser reduced the surface finish of the SLM titanium alloy from 4.2 to 0.8 μm Ra. Chemical etching is used...
Image
Published: 15 June 2020
Fig. 3 Light optical microscopy images of polished and etched cross sections showing the grain structure of pure molybdenum processed by selective laser melting (SLM). (a) Top view. (b) Side view. The symbol at the bottom left corner indicates the SLM building direction. Source: Ref 12 More
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Published: 12 September 2022
Fig. 18 Scanning electron microscopy images of laser-engineered net-shaping-deposited Co-Cr-Mo showing interdendritic carbide precipitation. (a) Columnar dendritic region. (b) Fine equiaxed dendritic and light-etching regions. (c) Equiaxed dendritic region at higher magnification. Source: Ref More
Image
Published: 01 January 1993
Fig. 5 Pulsed Nd:YAG laser weld in Al-8Fe-2Mo sheet. (a) Transverse section. (b) Plan view. (c) TEM microstructure of the light-etching regions near the fusion boundary with base alloy. Arrows in (a) and (b) indicate curvilinear bands bounding successive melt zones. Arrow in (c) indicates More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003194
EISBN: 978-1-62708-199-3
... machining, electrical discharge machining, chemical machining, abrasive jet machining, laser beam machining, electron beam machining, ultrasonic impact grinding, hydrodynamic machining, thermochemical machining, abrasive flow machining, and electrical discharge wire cutting. abrasive jet machining...
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
... that reflects the scanning path of the laser. The side view ( Fig. 3b ) reveals epitaxially grown columnar grains, intergranular cracks, and pores. Fig. 3 Light optical microscopy images of polished and etched cross sections showing the grain structure of pure molybdenum processed by selective laser...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006853
EISBN: 978-1-62708-392-8
.... Laser Treatment In contrast with sandblasting and acid etching techniques, laser treatment exerts zero risk of surface contamination, because there is no direct contact between the laser and the biomaterial ( Ref 51 ). Laser surface treatments also tend to improve material wettability by altering...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006532
EISBN: 978-1-62708-207-5
... Abstract This article focuses on a variety of laser beam machining (LBM) operations of aluminum and its alloys, namely, laser cutting, laser drilling, laser milling, laser turning, laser grooving, laser scribing, laser marking, and laser micromachining. It presents different approaches...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006365
EISBN: 978-1-62708-192-4
... different methods are available and used for modifying surface topography of contact surfaces and creating specific surface microtopographies known as surface texturing. They range from mechanical etching to laser-ablation techniques. Methods could also be categorized into three groups according...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006641
EISBN: 978-1-62708-213-6
... insertion ( Ref 3 , 4 ), electrothermal vaporization ( Ref 5 ), high-voltage spark ( Ref 6 ), laser ablation ( Ref 7 ), and many other approaches. Laser ablation is by far the most versatile, widely used direct solid-introduction technique. Laser ablation involves the conversion of a solid material...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002170
EISBN: 978-1-62708-188-7
... Abstract This article discusses the principal process steps, specifications, defects, applications, advantages, and disadvantages of chemical milling (CM) in aerospace industries. The process steps include precleaning, masking, scribing, etching, final cleaning, stripping, and mechanical...
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
... When etched metallographic sections of dissimilar-metal macroscale laser and electron beam welds are examined, fusion zones typically exhibit incomplete mixing as evidenced by a marbled structure. It is also very common to see dendritic solidification structures, and further, one often sees an unmixed...