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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...
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Published: 01 June 2019
Fig. 2 (a) A magnetite coating on hot rolled sheet, with fresh rust breaking through; (b) Hot rolled surface, about 60% covered with fresh rust; (c) Hot rolled steel, with all the original magnetite lost. Rust is beginning to darken where arrowed, to form hematite. More
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Published: 01 June 2019
Fig. 16 Coating features of the vane along the airfoil section. (a) Convex side showing intact coating and shrinkage porosity; (b) Coating-matrix interface along convex side; (c) Vane coating and coating-matrix interface along concave side. More
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Published: 01 June 2019
Fig. 17 Coating degeneration and corrosion attack in MAR-M302 vane along the concave airfoil side. (a) Fine cracking; (b) Subsurface shrinkage porosity; (c) Corrosion product penetration in the subsurface porosity. More
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Published: 01 June 2019
Fig. 18 EDX analysis of the coating and corroded area of MAR-M302 vane. (a) Al and S peaks observed in the coating; (b) Corroded fracture region showing Na, S, Al and Si peaks. More
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Published: 01 December 2019
Fig. 6 Cross-section showing electroless nickel coating delamination and cracking More
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Published: 01 December 2019
Fig. 6 Chromium-nickel coating layer on the marriage bolt surface. 1000× More
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Published: 01 December 2019
Fig. 7 Coating layer deteriorated by corrosion. 500× More
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Published: 01 December 2019
Fig. 12 Cage section showing general microstructure and silver coating More
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Published: 01 December 2019
Fig. 6 Trailing edge yielding and aluminide coating wrinkling associated with stress-rupture cracking on turbine airfoils More
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Published: 01 January 2002
Fig. 48 Artifacts generated by improper platinum sputter coating of a 4.6 mm (0.18 in.) diameter polycarbonate rotating beam fatigue specimen. This SEM view shows a pattern in the coating reminiscent of “mud-cracking.” More
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Published: 01 January 2002
Fig. 12 Adhesive delamination in thermally sprayed Al 2 O 3 coating More
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Published: 01 January 2002
Fig. 13 Cohesive delamination in thermally sprayed WC-Co coating (backscattered electron image) More
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Published: 01 January 2002
Fig. 15 Schematic of coating delamination process for cermet and ceramic coatings More
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Published: 01 January 2002
Fig. 16 Bulk deformation failure of WC-Co coating, indicating cracks in the middle of the wear track and substrate migration at the edge of the wear track More
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Published: 01 January 2002
Fig. 18 Spalling of thermally sprayed WC-Co coating More
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Published: 01 January 2002
Fig. 20 Influence of normalized coating thickness on the performance of HVOF coating on 440C steel substrate (σ = 1840 MPa, or 267 ksi) More
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Published: 01 January 2002
Fig. 28 Coating life diagram calculated using computer program COATLIFE. The diagram shows the protective and failed regimes of MCrAlY-coated GTD-111 blade More
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Published: 01 December 1992
Fig. 10 EDS graph of fracture surface coating. More
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Published: 01 December 1993
Fig. 3 SEM micrograph showing missing coating in a deteriorated area. 12.4×. More