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bonding

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Image
Published: 01 December 1992
Fig. 1 Silver soild-state bonding process. More
Image
Published: 01 December 1992
Fig. 1 Porous, coated knee implant, as received. Insufficient bonding occurred at the tip of the patella flange. More
Image
Published: 01 December 1992
Fig. 3 Metallographic section through the region of insufficient bonding. 64×. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... Abstract Silver solid-state bonded components containing uranium failed under zero or low applied load several years after manufacture. The final operation in their manufacture was a proof loading that applied a sustained tensile stress to the bond, which all components passed. The components...
Image
Published: 01 June 2019
Fig. 2 Transition assemblies made from 3003 aluminum roll-bonded to stainless steel (top). More
Image
Published: 01 June 2019
Fig. 10 An aluminum-to-stainless-steel roll-bond transition showing pits in the 3003 aluminum. More
Image
Published: 01 December 2019
Fig. 4 XRD patterns of bond coat before and after spallation More
Image
Published: 01 December 2019
Fig. 5 Composition changes by EDS across bond/substrate interface (a) 721ES, (b) welded, and (c) normal region of inner root area, (d) Aluminum line profile of (a) to (c) More
Image
Published: 01 December 1992
Fig. 4 Microstructure showing end-grain corrosion in the explosively bonded outer E-Brite layer. More
Image
Published: 01 December 1992
Fig. 4 Higher-magnification view of the low-bond-strength region. Note the high degree of bead-to-bead bonding compared with the bead-to-substrate bond. 158×. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... Abstract A femoral knee implant was returned to the casting vendor for analysis after exhibiting poor bond strength between the cast substrate and a sintered porous coating. Both the coating and the substrate were manufactured from a cobalt-chromium-molybdenum alloy. Metallographic analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
...Chemical compositions of bond-coat layer, base, and filler metal Table 1 Chemical compositions of bond-coat layer, base, and filler metal Chemical Composition, wt.% Co Cr Ni W Ta C Zr Fe Ti Al Base metal ECY768 54.32 23.64 10.17 6.83 3.70 0.61 0.03 0.35 0.25...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047745
EISBN: 978-1-62708-235-8
... that the filler metal had not covered all mating surfaces. Lack of a metallurgical bond between the brazing alloy and stainless steel and instead mechanical bonding of the filler metal to an oxide layer on the stainless steel surface was revealed by examination of the broken joint at the cup. It was indicated...
Image
Published: 01 June 2019
Fig. 5 An 11× SEM showing the severe deep pitting near the stainless-steel-to-aluminum roll-bond and several millimeters away from the bond (seen at the lower left in the picture). More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001546
EISBN: 978-1-62708-217-4
... that the numerous hairline cracks in the Alclad layer adjacent to the main fracture were fatigue cracks. In another case, bonded samples of 2024-T3 sheet were fatigue tested at various stress levels. Failures could be separated into three groups: those that failed in the adhesive bond, those that failed in the base...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... were applied to remove the convergent insulation from the nozzle shells. The process was made difficult by the excellent EPON 934 bonds between the MXSE-55 and the MX-2646 convergent nozzle liner. Figure 2 shows reassembled pieces of the cut-off convergent liner material. The dark patches indicate...
Image
Published: 01 December 1992
Fig. 7 Several secondary transgranular stress cracks initiated at the nickel-iron bond layer/cladding interface and propagated into the stainless steel cladding. No TGSCC was in the nickel-iron bond layer. These cracks formed after the penetration of primary TGSCC from the clad surface. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001069
EISBN: 978-1-62708-214-3
..., with no significant differences between the affected and unaffected segments. The cladding hardnesses in both segments were similar, 88 to 91 HRB. The hardness of the carbon steel was 82 HRB. Both segments exhibited a nickel-rich intermediate bond layer, 25 mm thick. The austenitic grain size was finer next...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047753
EISBN: 978-1-62708-235-8
... was revealed by visual examination. Fatigue marks, emanating from multiple crack origins on the inside surface of the housing at the brazed joint were revealed by further study of the fracture. A poor metallurgical bond was confirmed by the presence of large irregular voids, flux trapped braze metal...
Image
Published: 30 August 2021
of remnant bond coating (upper right) and the subsurface oxides. (e) Optical micrograph of the coating in a relatively cool region showing the discontinuous bond coating coverage; arrows indicate locations where the outer ceramic layer (light gray) is in direct contact with the substrate. More