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coating failures

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Published: 01 June 2022
Figure 2 Bond test failure map for coating(s) applied on cylindrical button. Courtesy of Sulzer Metco Inc. More
Image
Published: 01 June 2016
Fig. 5.37 (a) Bond adhesion strength test setup (ASTM C 633) along with a schematic showing various coating failure modes. (b) Triple-lug shear test setup. Source: Ref 5.79 , 5.84 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040101
EISBN: 978-1-62708-428-4
... in the direction perpendicular to the interface between the coating and the substrate. The level of tensile load is gradually increased from “0” to the load that results in the sample failure—the coating pulls out from the substrate or fractured in two pieces inside the coating. The coated surface is always a flat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460277
EISBN: 978-1-62708-285-3
... adhesion strength as measured by ASTM C 633 ( Fig. 11.3c ) as well as a triple-lug shear test ( Fig. 11.3d ), and comparable corrosion properties to those of a high-velocity oxygen-fuel-sprayed Al-12Si coating ( Fig. 11.3e ). The tensile adhesion test resulted in a glue failure on different magnesium...
Image
Published: 01 June 2016
parameters Helium + Nitrogen 41–62 6,000–9,000 Partial coating and interface Helium + HT >3 > 12,000 Glue failure always Nitroge + HT 70–83 1,000–12,000 Glue failure always (b) More
Image
Published: 01 June 2016
parameters Helium + Nitrogen 41–62 6,000–9,000 Partial coating and interface Helium + HT >3 > 12,000 Glue failure always Nitroge + HT 70–83 1,000–12,000 Glue failure always (b) More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270143
EISBN: 978-1-62708-301-0
... by mechanical damage. coating cracks fatigue failure fractography turbine rotor blade visual examination Summary A low-pressure turbine rotor (LPTR) blade failed during a test run causing damage to all the blades. The blade had failed by fatigue and the fatigue crack had initiated at surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
... or fracture. If a coating is degraded, a component may be susceptible to surface attack and failure has occurred. Similarly, if a part creeps during operation so that the part begins to impinge on another part, failure has occurred. In the general sense, elevated-temperature failure modes may...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780141
EISBN: 978-1-62708-268-6
... Abstract Contaminants can be a cause of numerous types of system failures. There are numerous techniques for confirming contaminant presence. When the presence of a contaminant is suspected, the failure analysis team must find and eliminate the contaminant source, which can be obvious or quite...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
.... For example, if a brittle coating is used over a ductile plastic, brittle failure of the plastic can occur on impact. Basically, the coating can act as a crack-initiating site. The crack then propagates into the plastic, causing premature failure. Despite these potential problems, coatings are widely...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
.... All of the rivets on the failed blade were missing and sections of skin were torn from most of the rivet holes. One such rivet hole was examined in a SEM, revealing corrosion on one of the tear surfaces and dimples (characteristic of ductile overload failure) on the other. In addition, the inner...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910001
EISBN: 978-1-62708-250-1
... Implement plan to reduce costs Lower risk of failure Safety Product liability Avoidance of regulation Loss of goodwill Review process and products for exposure to risk Evaluate risk and consequences of failure Lower exposure by technology change Develop new and expanded markets Coatings Alloys...
Image
Published: 01 June 2016
corrosion comparison for the aluminum-magnesium couple. Source: Ref 11.2 Substrate Coating system Average thickness Average maximum tensile stress Standard deviation tensile stress 95% confidence tensile Observed failure mechanism mm in. MPa psi MPa psi MPa psi ZE41A-T5 6061 More
Image
Published: 01 June 2016
corrosion comparison for the aluminum-magnesium couple. Source: Ref 11.2 Substrate Coating system Average thickness Average maximum tensile stress Standard deviation tensile stress 95% confidence tensile Observed failure mechanism mm in. MPa psi MPa psi MPa psi ZE41A-T5 6061 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... obtained using rolling four-ball machine. Source: Ref 16.3 Fig. 16.11 Subsurface crack observations during delamination failure of thermal spray WC-Co coating. Source: Ref 16.3 Cavitation Cavitation is defined as the repeated nucleation, growth, and violent collapse of cavities...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... replacement of a component is environmental degradation of material. Control of environment or protection of materials (by coatings or self-protective oxides) is essential to most elevated-temperature applications. General oxidation can lead to premature failure; grain-boundary oxidation may produce...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930197
EISBN: 978-1-62708-359-1
... of coatings, and sometimes oil and grease. These may be between the surfaces to be joined or may be between a part and the electrode contacting the part. Whether or not the inclusions cause failure depends on their quantity, size, location within the weld microstructure, and such properties as melting point...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180061
EISBN: 978-1-62708-256-3
... Abstract Statistics, data analysis, root cause analysis, and problem-solving processes play a key role in failure investigations. This chapter explains how to collect failure investigation data, how to build and maintain a database for company-related failures, and how to use corresponding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... Coatings , Gear Technology , July/Aug 1999 , p 35 – 44 7. Errichello R. , Tutorial: How to Analyze Gear Failures , Practical Failure Analysis , Vol 2 ( No. 6 ), December 2002 , p 8 – 16 10.1007/BF02715492 8. Miller B.A. , Overload Failures , Failure Analysis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110587
EISBN: 978-1-62708-247-1
... devices are typically hermetically sealed in a metallic can or a ceramic container. For wet Ta CAPS, an acid based liquid solution is used as the negative electrode. Other through hole devices are conformally coated or over-molded. Thanks to their benign failure mode and better electrical performance...