1-20 of 186 Search Results for

scanning-electron microscope fractographs

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 01 December 2019
Fig. 6 Scanning electron microscopic fractograph showing the faint horizontal striations and fine steps More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048139
EISBN: 978-1-62708-225-9
... a typical fatigue fracture that originated at a tool mark on the wire surface. This fracture surface is shown in Fig. 1(b) ; the fracture origin is indicated by the arrow at the fight edge of the fracture surface. Scanning electron microscope fractographs showed regions displaying beach marks around...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001656
EISBN: 978-1-62708-219-8
... Abstract Some corrosion processes in the presence of chlorides, for steel embedded in concrete, are described and illustrated with the aid of scanning electron microscope EDXA data. Observations made of failure surfaces of reinforcements removed from the concrete beams after being subjected...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... that are based on fracture profilometry. This is followed by a section describing the methods based on scanning electron microscope fractography. The article also addresses procedures for three-dimensional fracture surface reconstruction. In each case, sufficient methodological details, governing equations...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001380
EISBN: 978-1-62708-215-0
... One of the two AISI 4340 steel pitch horn bolts from the main rotor hub assembly failed while in service. Optical microscope revealed evidence of corrosion pitting in regions adjacent to the fracture. Fractographic examination utilizing a scanning electron microscope revealed multiple crack origins...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001761
EISBN: 978-1-62708-241-9
... initiated, was determined by scanning electron microscope (SEM) equipped with electron-dispersive X-ray analysis (EDAX). Microhardness gradient through the nitrided layer close to fracture, surface hardness, and macrohardness at the journals were all measured. Fractographic analysis indicated that fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046227
EISBN: 978-1-62708-217-4
... near the fractures. Metallurgical Investigation Fractographs taken with a scanning electron microscope confirmed that the beach marks observed at low-power magnification contained the parallel striations characteristic of fatigue. Beyond the fatigue zones, the surface had the dimpled features...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001664
EISBN: 978-1-62708-226-6
... of Fractographs , American Society for Metals , Metals Park, OH , p. 223 ( 1974 ). 9. Engell-Nielsen S. , “Scanning-Electron Microscope Fractographs” (chart), The Technical Institute, KK-2630 Tastrup, Denmark ( 1975 ). 10. Dobbs H. S. and Scales J. T. , “Fracture and Corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001733
EISBN: 978-1-62708-225-9
... compared with drive cable failures using a scanning electron microscope. Figure 2 shows a scanning electron fractograph of a typical drive cable break. It illustrates three fractographic features commonly observed: 1) combined transverse and longitudinal crack growth, 2) shear lip formation, and 3...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001144
EISBN: 978-1-62708-217-4
.... Fractographic analysis of the fractures by scanning electron microscopy revealed striations typical of fatigue, as shown in Fig. 3 . Each striation usually corresponds to a single load cycle ( 1 , 2 , 3 ). The striation pattern indicated random loading with additional distinct spike load indications...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001822
EISBN: 978-1-62708-241-9
... Micrograph showing cracks at the toes of weld indicating crack initiation from both outside and inside surfaces (magnification of smaller picture is 16×) Fig. 5 Micrograph showing transgranular cracking indicated by the arrow. Sample etched Fig. 6 Scanning electron microscopic fractograph...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... of materials since the 1950s, and scanning electron microscopes (SEMs) have been commercially available since 1965 ( Ref 23 ). Today (2020), the SEM is standard equipment for any laboratory performing failure analysis and fractography. The SEM offers significantly superior resolution and depth of field...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001038
EISBN: 978-1-62708-214-3
... and could not be released for testing. Therefore, the investigation was limited to nondestructive means, including photographic examination (visually and at 10× magnification) of the wheel and replication of pertinent fracture surfaces for further study via scanning electron microscope (SEM) fractography...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006943
EISBN: 978-1-62708-395-9
... spectroscopy Fig. 2 Relation between resolution versus length scale for various examinations Fig. 3 Schematic of the basic components of a conventional scanning electron microscope. BSE, backscattered electron; SE, secondary electron Fig. 10 Gold coating damage in a Pebax catheter...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001361
EISBN: 978-1-62708-215-0
... Examination Scanning Electron Microscopy/Fractography The fracture surface was examined with a scanning electron microscope (SEM). The smooth “oyster shell” areas ( Fig. 5a ) on the fracture surface displayed faint fatigue striations throughout, some of which are shown in Fig. 5(b) . The surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... Abstract The scanning electron microscope (SEM) is one of the most versatile instruments for investigating the microscopic features of most solid materials. The SEM provides the user with an unparalleled ability to observe and quantify the surface of a sample. This article discusses...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... ). Samples containing both transverse and longitudinal fracture surfaces, at areas with the least amount of oxidation, were selected for examination in a scanning electron microscope (SEM). Three fractured pieces ( Fig. 1 ) and part of the tube containing the mating fracture surface were received...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001390
EISBN: 978-1-62708-215-0
... sent for failure analysis. Fractographic examination required cutting the defective portions of heaters into lengths that could be accommodated by a scanning electron microscope (SEM). Longitudinal sections of the heaters were mounted in molds of quick-setting resin and prepared for metallographic...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001384
EISBN: 978-1-62708-215-0
... Visual Examination of General Physical Features Applications Testing Procedure and Results Surface Examination Scanning Electron Microscopy/Fractography The fracture surfaces of both the bolt and the collet arm were examined with a scanning electron microscope (SEM). Clear evidence...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045918
EISBN: 978-1-62708-235-8
... was observed. Results The part was carefully sectioned to permit opening of the crack and was examined in a scanning electron microscope. The crack surfaces were found to be intergranular, with contaminant particles on a large number of the grain facets ( Fig. 1a ). Energy-dispersive x-ray analysis...