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Search Results for interference-contrast illumination
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Image
Published: 01 December 2004
Fig. 49 Zircaloy forging as viewed under differential interference contrast illumination. The parallel platelet structure is an area lower in carbon content. Etched in 45 mL H 2 O, 45 mL HNO 3 , and 10 mL HF and heat tinted at 425 °C (800 °F). 100×. (P.E. Danielson)
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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003754
EISBN: 978-1-62708-177-1
... discusses the examination of specimen surfaces using polarized light, phase contrast, oblique illumination, dark-field illumination, bright-field illumination, interference-contrast illumination, and phase contrast illumination. Special techniques and devices that may be used with the optical microscope...
Abstract
This article provides information on the basic components of a light microscope, including the illumination system, collector lens, and optical and mechanical components. It describes optical performance in terms of image aberrations, resolution, and depth of field. The article discusses the examination of specimen surfaces using polarized light, phase contrast, oblique illumination, dark-field illumination, bright-field illumination, interference-contrast illumination, and phase contrast illumination. Special techniques and devices that may be used with the optical microscope, to obtain additional information, are also described. The article concludes with information on photomicroscopy and macrophotography.
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in Metallography and Microstructures of Zirconium, Hafnium, and Their Alloys
> Metallography and Microstructures
Published: 01 December 2004
Fig. 3 Zircaloy 4 as-cast ingot. (a) Center section. Attack polished, heat tinted, etchant procedure No. 6, and viewed with differential interference contrast illumination. (b) Midthickness. Attack polished, heat tinted, and viewed with differential interference contrast illumination
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Image
Published: 01 December 2004
Fig. 21 Cu-11.8Al (aluminum bronze), heat treated, with martensite in the microstructure. (a) Bright-field illumination. (b) Dark-field illumination. (c) Differential interference-contrast illumination. (d) Crossed polarized light illumination. As-polished. 200×
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Image
Published: 01 December 2004
Fig. 32 Graphite nodules in cast iron. (a) Bright-field illumination. (b) Differential interference-contrast illumination. (c) Crossed polarized light illumination. 2% nital. 400×
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Image
Published: 01 December 2004
Fig. 36 Solution-annealed and aged Waspaloy (UNS N07001). (a) Bright-field illumination. (b) Dark-field illumination. (c) Differential interference-contrast illumination. Glyceregia. 200×
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Published: 01 December 2004
Fig. 19 Austenitic stainless steel (Fe-20Cr-33Ni-2.5Mo-3.5Cu and Nb + Ta), solution annealed. (a) Bright-field illumination. (b) Dark-field illumination. (c) Differential interference-contrast illumination. 15 mL HCl, 10 mL acetic acid, 10 mL HNO 3 , and 2 drops glycerol. 400×
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Published: 01 December 2004
Fig. 20 Cu-8.9P sand cast alloy showing the α + Cu 3 P eutectic. (a) Bright-field illumination. (b) Dark-field illumination. (c) Differential interference-contrast illumination. Swab etched using an aqueous solution of 3% (NH 4 ) 2 S 2 O 8 and 1% NH 4 OH. 1000×
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Image
Published: 15 January 2021
Fig. 17 Light micrographs comparing images made with (a) a replica, using differential interference contrast illumination, and (b) a direct micrograph, using bright-field illumination, of a heavily nitrided AISI 4150 chuck jaw etched with nital. Note that the replica does not reveal the crack
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Image
Published: 01 December 2004
Fig. 39 Inconel 718 (UNS N07718) heat treated 100 h at 870 °C (1600 °F) to produce needlelike orthorhombic Ni 3 Nb. (a) Bright-field illumination. (b) Differential interference-contrast illumination. Particles in relief in (b) are niobium carbides; particles flush with the surface are niobium
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Published: 01 December 2004
Fig. 29 Comparison of bright-field illumination (a), cross-polarized light (b), and differential interference contrast illumination (c and d) used to examine the basketweave pattern of an α-β Ti-6Al-4V alloy. Figures (c) and (d) illustrate the observation of reversed topography by adjusting
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Image
Published: 01 December 2004
Fig. 44 As-cleaved antimony specimen viewed under differential interference contrast illumination. Views under different contrast conditions show the greater sensitivity in the gray regime (a) than in the nongray regime (b). Twins, river patterns, and cracks are present. As-polished. 200
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Published: 15 January 2021
Fig. 26 Comparison of (a) bright-field and (b) Nomarski differential interference contrast illumination for examination of a fatigue crack in an as-polished aluminum alloy. Original magnification: 600×
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Image
Published: 01 January 1994
Fig. 3 (a) Bright-field image of SiSiC. 200×. (b) Dark-field image of SiSiC. 200×. (c) Differential interference contrast illumination image of SiSiC. 200×
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in Metallography and Microstructures of Zirconium, Hafnium, and Their Alloys
> Metallography and Microstructures
Published: 01 December 2004
Fig. 21 Zr702 plate, transverse. Attack polished, anodized, and viewed with differential interference contrast illumination. This micrograph shows interstitial contamination in the weld area. Original magnification: 750×.
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Image
in Metallography and Microstructures of Low-Carbon and Coated Steels
> Metallography and Microstructures
Published: 01 December 2004
Fig. 48 Microstructure of a hot dipped Galfan coating on a low-carbon steel sheet. Etched in 2% nitric acid in amyl alcohol. Differential (Nomarski) interference contrast illumination. 1500×
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Image
Published: 01 January 2000
Fig. 22 Knoop indents (50 gf) in alpha (white) and beta (dark) grains in naval brass (C 46400) (differential interference contrast illumination, Klemm's I reagent). 500×
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Published: 01 January 2000
Fig. 21 Knoop indents in ferrite (dark) and austenite (white) grains in a dual-phase stainless steel (differential interference contrast illumination, aqueous 20% nitric acid, 3 V dc). 500×
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Published: 01 December 2004
Fig. 46 Hafnium crystal bar showing twins caused by cold working. Attack polished, heat tinted at 480 °C (900 °F), and viewed under differential interference contrast illumination. 65×. (P.E. Danielson)
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Image
Published: 15 January 2021
Fig. 10 Light micrograph showing residual damage (arrows) from preparation that was not removed by the procedure when this specimen of commercial-purity titanium was prepared. The specimen was etched with Kroll’s reagent and photographed with Nomarski differential interference contrast
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