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molybdenum disulfide

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046512
EISBN: 978-1-62708-234-1
... been nickel plated. During assembly of the actuators a lubricant containing molybdenum disulfide had been applied to the gaskets as a sealant. The vellum gasket was found to be electrically conductive, and analysis (visual inspection, 500x unetched micrographs, galvanic action testing, and x-ray...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
.... Recommendations included hardening and tempering the bolts to the hardness range of 375 to 430 HRB. The thimbles should be heat treated to a similar microstructure and the same hardness range as those of the bolt. Molybdenum disulfide lubricant can be liberally applied during the initial installation of the bolts...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... and was packed with molybdenum disulfide (MoS 2 ) lithium grease. Metallurgical structures and chemical compositions of the bearing’s matrix materials were inspected using a microscope and photoelectric direct reading spectrometer. SEM/EDS was used to examine the local morphology and composition of fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006899
EISBN: 978-1-62708-225-9
... Abstract Type 410 stainless steel bolts were used to hold together galvanized gray cast iron splice case halves. Before installation, the bolts were treated with molybdenum disulfide (MoS 2 ) antiseize compound. Several failures of splice case bolts were discovered in flooded manholes after...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047998
EISBN: 978-1-62708-225-9
...-type mineral-oil lubricant (containing molybdenum disulfide and polytetrafluoroethylene particles) or grease conforming to MIL-G-81322 (containing thickening agent and synthetic hydrocarbons) and had two-piece spot-welded retainers. On visual examination, the balls were observed to be embedded...
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Published: 01 June 2019
(c) became saturated with moisture-containing molybdenum disulfide lubricant that acted as an electrolyte. (d) and (e) Micrographs of unetched specimens that were taken from a corroded area and an uncorroded area, respectively, of the aluminum alloy spacer. 500× More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
.... Third, the presence of molybdenum disulfide and moisture resulted in weak sulfurous acid, which further accelerated SCC by nature of its corrosive action. The purpose of specifying interference-fit fasteners as a structural enhancement in this case was to increase fatigue life by reducing the stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
... between surfaces to occur but with as low a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction-type material, such as molybdenum disulfide...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001619
EISBN: 978-1-62708-225-9
..., such as molybdenum disulfide, to a liquid or grease lubricant may produce an improvement. 9 An alternative policy is to clamp the surfaces sufficiently tight so that no relative movement occurs. Also, surface hardening by nitriding has been shown to be beneficial in improving the fretting-fatigue strength of steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001620
EISBN: 978-1-62708-229-7
... a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction-type material, such as molybdenum disulfide, to a liquid or grease lubricant may produce...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... of molybdenum and sulfur, indicative that a thread lubricant consistent with molybdenum disulfide (MoS 2 ) was present. Examination of the nuts revealed the presence of cadmium plating, common for aerospace fasteners 4 ( Fig. 8 ). Fig. 7 Energy dispersive X-ray microanalysis (EDXA) spectrum indicating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006828
EISBN: 978-1-62708-329-4
... at the brazing temperature. Generally, fluxes, reducing gas protective atmospheres, and vacuum are intended to maintain surface cleanliness. Contaminants, such as oil, graphite, molybdenum disulfide, or lead lubricants used during machining or forming, must be removed before assembly. Oil and grease...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... polytetrafluoroethylene (PTFE) is available. Polytetrafluoroethylene is sometimes added to acetals to reduce friction. Graphite and molybdenum disulfide (MoS 2 ) are also added; although they decrease friction, these solid lubricants usually do not prevent wear. Another low-cost bushing material is porous bronze...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006849
EISBN: 978-1-62708-395-9
... illustrate the value of TGA as an analytical instrument for characterizing polymers. Figure 28 shows the composition of nylon 6/6 lightly modified with molybdenum disulfide. Figure 29 depicts the moisture versus resin-glass content in a nylon molding compound. Figure 30 illustrates the differential...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... backing to increase the heat-flow rate. The third is to reinforce the polymer with a material that has high thermal conductivity, such as carbon fibers, graphite, and molybdenum disulfide (MoS 2 ). The third solution to the thermal problem also offers resistance to cold flow. For these purposes...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006912
EISBN: 978-1-62708-395-9
... for improved ESCR Fiberglass or carbon-fiber reinforcement for improved fatigue resistance Ultraviolet stabilizers for improved UV stability Antioxidants for improved oxidation resistance Polytetrafluorethylene or molybdenum disulfide for improved wear resistance and lower friction Material...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... blade/disc attachment surfaces, ductile coatings such as Cu-Ni-In can be used to equalize surface loads and minimize asperity fracture. Solid lubricants such as molybdenum disulfide have been employed to prevent microwelding, thereby reducing wear. A visual inspection is typically sufficient...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... temperature of the lubricant, which is 205 to 230 °C (400 to 450 °F) for the synthetic lubricants that are widely used at elevated temperatures. Molybdenum high-speed tool steels, such as M1, M2, and M10, are suitable for use to about 425 °C (800 °F) in oxidizing environments. Grades M1 and M2 maintain...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9