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bright-field illumination

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030089
EISBN: 978-1-62708-349-2
... include bright-field illumination, dark-field illumination, polarized-light microscopy, interference and contrast microscopy, and fluorescence microscopy. The chapter also provides a discussion of sample preparation materials such as dyes, etchants, and stains for the analysis of composite materials using...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030137
EISBN: 978-1-62708-349-2
... performance. This chapter describes the optical microscopy and bright-field illumination techniques involved in analyzing ply terminations, prepreg plies, splices, and fiber orientation to provide the insight necessary for optimizing composite structure and performance. composites fiber orientation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400109
EISBN: 978-1-62708-258-7
..., the field of view on the specimen is in focus. Electrolytic etch (60 ml nitric acid in 40 ml water, stainless steel cathode). 400× Fig. 5.38 Sketch of a ray diagram showing bright-field illumination. Note that light rays impinging on a scratch on the specimen surface are reflected away from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850267
EISBN: 978-1-62708-260-0
... the difference between amplitude and optical-phase features and how they are revealed using appropriate illumination methods. It compares images obtained using bright field and dark field illumination, polarized and cross-polarized light, and interference-contrast techniques. It also discusses the use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030159
EISBN: 978-1-62708-349-2
... in composite materials. bright-field illumination composite materials dark-field illumination epi-fluorescence microcrack analysis polarized light microscopy The formation of microcracks in composite materials may arise from static-, dynamic-, impact-, or fatigue-loading situations and also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... makeup and have similar mechanical properties but are vastly different in structure, depending on the manufacturer ( Fig. 1.3a , b ). Fig. 1.1 Composite cross sections. (a) Sheet molding compound made from carbon-black-filled epoxy resin and chopped glass fiber. Bright-field illumination, 65 mm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030245
EISBN: 978-1-62708-349-2
... be remounted to provide adequate handling of the microscopic sample. Polished cross-sectional mounts can be examined with a variety of microscopy techniques, including polarized light, bright- and dark-field illumination, and epi-fluorescence. The damage characteristics depend on many factors, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
... composite that has high void content. Void areas are due to residual solvent from the prepregging process. Bright-field illumination, 10× objective Voids are also commonly found in composite materials due to entrapped air from resin mixing (such as bubbles in the resin) that is not removed before...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030223
EISBN: 978-1-62708-349-2
... bright-field illumination (inset D). This provided a three-dimensional view of the fibers and highlighted the fiber structure. Fig. 13.1 Honeycomb sandwich structure composite cross section (~1 μm ultrathin section) showing differences in the constituents and resin intermingling. Transmitted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030193
EISBN: 978-1-62708-349-2
.... The cracking and delamination can be easily observed using bright-field illumination. This sample was prepared with no mount, which allows for a quick assessment of the damage from impact. One issue associated with not mounting the sample is that the fragile fracture areas may be further damaged during sample...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
... microscope employing bright-field illumination. Source: Ref 1 Fig. 6 Example of an inverted metallurgical reflecting microscope for photomicroscopy (referred to as a metallograph). Courtesy of Nikon Inc. Source: Ref 1 Light Sources Microscopic Techniques All metallographs come...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030067
EISBN: 978-1-62708-349-2
... cut and the effect on the brittle boron fibers. The cracked fiber is easy to see, and scratches are evident in the micrograph. Bright-field illumination, 25× objective Fig. 4.3 Effect of a diamond saw cut on a boron fiber composite. Cracking can be seen to extend over 100 μm into these large...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030211
EISBN: 978-1-62708-349-2
... in many areas. With higher magnification ( Fig. 12.6 ) and the use of bright-field illumination, the bamboo fibers are found to be irregular in shape. Also in this micrograph, the appearance of a dispersed phase is indicated by light, circular areas. Other features that are even more complex...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030177
EISBN: 978-1-62708-349-2
... etched, and using epi-fluorescence. All of these techniques were performed on the same cross section. In the aspolished condition using epi-bright-field illumination, it can be observed in Fig. 10.8 that there is a stratification of resin-rich areas between the fiber beds. Figure 10.8 also reveals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030043
EISBN: 978-1-62708-349-2
... with grinding and polishing debris. Unimpregnated areas in the specimens can usually be eliminated by vacuum impregnation of the sample with the mounting resin, along with a pressure cure. In this case, a dyed mounting resin would have provided better contrast with the matrix resin. Bright-field illumination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230199
EISBN: 978-1-62708-298-3
... R. , et al. , 1948 . “ Electropolishing and Electroetching Beryllium for Microexamination under Bright Field Illumination ,” Argonne National Laboratory , unpublished work Price C.W. , and McCall J.L. , 1968 . “ A Review of Metallographic Preparation Procedures for Beryllium...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850165
EISBN: 978-1-62708-260-0
... constituents exhibit large differences in light reflectivity after polishing, the desired microstructure, or certain features of the microstructure, can be observed in the as-polished condition under bright-field illumination without recourse to subsequent treatments such as etching. Constituents that differ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030237
EISBN: 978-1-62708-349-2
..., space hardware designers now have a better understanding of what materials can be used in specific locations and for what extent of time as a result of the LDEF. Fig. 14.5 Degradation of a composite surface after exposure to atomic oxygen. (a) Bright-field illumination, 25× objective. (b...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.9781627082600
EISBN: 978-1-62708-260-0