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surface preparation

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001415
EISBN: 978-1-62708-236-5
... not been grooved but appeared to have been roughened by shot or grit-blasting prior to spraying and the deposit was more firmly adherent to these surfaces than in the case of the pins. It is doubtful, however, whether the adhesion of sprayed metal to a surface prepared even in this manner would always...
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Published: 01 January 2002
Fig. 12 Replicas prepared from fracture surfaces and viewed in the TEM. (a) River patterns of a brittle failure of a steel fastener. (b) Fine, equiaxed ductile dimples on the surface of a tensile fracture of a high-strength steel. The small carbide particles where local rupture and void More
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Published: 01 January 2002
Fig. 21 Light micrograph illustrating staining (arrow) on the surface of a prepared specimen of Ti-6%Al-2%Sn-4%Zr-2%Mo. The specimen was not etched. More
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Published: 01 December 1992
Fig. 11 Overall appearance of fracture surface of exemplar impact coupon prepared from the hardened outer perimeter of the axle. Note lack of deformation. More
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Published: 01 December 1992
Fig. 12 Fracture surface of subsized impact coupon prepared from the hardened perimeter of the axle, showing cleavage rupture with river patterns. 3400×. More
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Published: 01 December 1992
Fig. 13 Overall appearance of fracture surface of exemplar impact coupon prepared from the axle core. Note deformation of sides of tested coupon. More
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Published: 01 December 1992
Fig. 14 Fractured surface of subsized impact coupon prepared from the axle core, exhibiting a mixed mode (brittle cleavage and ductile dimples) of rupture. 136×. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
..., a procedure common to the surface preparation and machining of titanium alloys, which produced a superior surface finish. All of the grinding and polishing performed on the weldment was done with the Di-Profiler using various PSA-backed grinding papers and polishing cloths. The procedures followed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
... for cleaning and surface preparation, as well as for the actual plating deposition. Porosity that is linked to the surface can trap liquids from the cleaning and surface preparation baths, and these liquids are usually quite acidic. The trapped acid may initiate corrosion and generate hydrogen gas as a result...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
... with the quality of surface preparation. Cracks were prevalent in areas where the surface was smeared rather than properly machined. The area of cracking (for the cylinder that failed during pressure testing) was found by metallography to contain a distinct cold-worked layer with several shallow surface laps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
... of the panels was endorsed. Most importantly, surveillance of the anodizing process itself was emphasized. Alkaline cleaning Anodizing Auger electron spectroscopy Energy dispersive x ray analysis Fuel tanks Panels Scanning electron microscopy Sealing Surface preparation Vapor degreasing Wings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001628
EISBN: 978-1-62708-234-1
... or energy levels characteristic of that element, identifying the approximate concentration of each major element in the sample. The portable instrumentation is designed for rapid direct analysis without extensive surface preparation. The purpose of performing these analyses was to detect any metallic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001722
EISBN: 978-1-62708-236-5
.... 2 . It will be noted that, as is to be expected, the fatigue cracks followed the line of the pre-existing crack network. In order to investigate the foregoing features microscopically, a specimen was cut from the V-shaped region between the cracks and the oil-hole, the surface prepared lying...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001319
EISBN: 978-1-62708-215-0
.... Metallography Metallographic inspection of the cracked regions was carried out in situ by using a fixture to position a portable microscope vertically over the cracked region ( Fig. 1 ). Surface preparation was performed using standard commercial equipment. Figure 2 shows the morphology of a portion...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... grinding scratches must be removed; even very fine polishing scratches may not be tolerable in examining failed parts. Pullout, pitting, cracking of hard particles, smear, and other preparation artifacts must be avoided. Relief (i.e., excessive surface-height variations between structural features...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... by the etchant. Coarse grinding scratches must be removed; even very fine polishing scratches may not be tolerable in examining failed parts. Pullout, pitting, cracking of hard particles, smear, and other preparation artifacts must be avoided. Relief (i.e., excessive surface-height variations between...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001162
EISBN: 978-1-62708-220-4
... Abstract Some 99.90 pure tin tubes (0.15 mm thick) used for packaging a chemical compound cracked on bending and underwent brittle fracture prior to filling, while others remained ductile and showed no sign of failure. Examination showed that specimens prepared by mechanical methods...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001035
EISBN: 978-1-62708-214-3
... Charpy V-notch test coupons were prepared from both areas. Because the hardened outer surface layer was only about 6.4 mm (0.25 in.) thick, careful machining was required. After impact testing at room temperature, the appearance and toughness of the samples from the two areas were entirely different...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0090460
EISBN: 978-1-62708-234-1
... image showing features characteristic of severe degradation of the filter material. 118× To allow further assessment of the failure, a mounted cross section was prepared through one of the cracks. The cross section, as presented in Fig. 2 , showed a clear zone of degradation along the surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001610
EISBN: 978-1-62708-222-8
... conditions (passivation and surface roughness). Review of ASTM medical device standards, 8 however, does not provide any quantitative data concerning surface roughness and finish of surgical implants. One standard, 9 concerning the practice for surface preparation of metallic surgical implants, states...