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friction heating

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Image
Published: 01 June 2019
Fig. 18 Frictional heating at surface More
Image
Published: 01 January 2002
Fig. 31 Thermal fatigue cracking of a spur gear. (a) Radial cracking due to frictional heat against the thrust face. 0.4×. (b) Progression of thermal fatigue produced by the frictional heat. 1.5× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0065827
EISBN: 978-1-62708-221-1
... with superior properties was initiated. The nominal composition of Fe-0.50C-0.30Mn-0.40Si-5.00Cr-2.00Mo was developed which achieved the goals of edge retention, resistance to softening under frictional heating, wear resistance, ease of heat treatment, dimensional stability in heat treatment, grindability...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001575
EISBN: 978-1-62708-217-4
... discoloration (particularly on the driven gear) were also observed. The gears were made from 32Cr-Mo-V13 steel, hardened and nitrided to 750 to 950 HV. Micrographic inspection of the gear teeth revealed microstructural changes that, in context, appear to be the result of friction heating. The spacers consist...
Image
Published: 01 January 2002
Fig. 38 Pinion tooth profile. The pinion was plastically deformed by frictional heat and sliding pressures. The surface layer has locally rehardened, and galling is evident. 80× More
Image
Published: 01 January 2002
Fig. 37 Pinion tooth profile. Glazed surface showing the start of catastrophic movement of surface material. Frictional heat has already started to temper the surface. 75× More
Image
Published: 15 January 2021
Fig. 50 Light micrograph of a white-etching surface layer formed on a rail head due to frictional heat. This specimen was taken adjacent to a spalled area. Specimen etched with picral More
Image
Published: 01 January 2002
Fig. 42 Light micrograph of a white-etching surface layer formed on a rail head due to frictional heat. This specimen was taken adjacent to a spalled area. Specimen etched with picral More
Image
Published: 30 August 2021
Fig. 46 Macroetched (10% aqueous nitric acid) face of a cutter blade made from AISI S7 steel. Macroetching reveals the influence of frictional heat from service (dark-etching areas) that produces localized back tempering (softening). More
Image
Published: 01 January 2002
Fig. 46 Macroetched (10% aqueous nitric acid) face of a cutter blade made from AISI S7 steel. Macroetching reveals the influence of frictional heat from service (dark-etching areas) that produce localized back-tempering (softening). More
Image
Published: 30 August 2021
Fig. 22 Profile of traction motor shaft that failed at a change in section thickness. (a) Bearing regions exhibited fretting damage and slight smearing. (b) Evidence of frictional heating in a bearing location near the fracture. (c) Plan view of fracture surface showing symmetrical rotating More
Image
Published: 01 January 2002
at the surface and a back-tempered region beneath it caused by frictional heat. Etched with 3% nital. 295× More
Image
Published: 30 August 2021
of as-quenched martensite at the surface and a back-tempered region beneath it caused by frictional heat. Etched with 3% nital. Original magnification: 295× More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001754
EISBN: 978-1-62708-241-9
... Remainder Outer Race (OR) The OR was found to be without significant raceway damage ( Fig. 4 ). The ring did not exhibit any visually apparent evidence of elevated temperature operation or localized frictional heating except at the corner between the raceway and shoulder where a slight lip...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... surface of the shaft ( Fig. 1 , right side) contained swirls of metal softened by frictional heat as a result of rotation of the lower part of the shaft. Welding of the plasticized outer ring of metal on the shaft and solidification of the swirls probably occurred while the pulverizer was shut down...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048787
EISBN: 978-1-62708-235-8
... of the fire-extinguisher case was the result of ferrite streaks that were formed when the metal was overheated. The initial forming temperature of the case plus frictional heat generated during spinning resulted in extreme overheating and some localized melting. Recommendations The temperature...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001305
EISBN: 978-1-62708-215-0
... of approximately 315 °C (600 °F). This heating occurred after the wheel fractured and was caused by the axle rotating relative to the wheel. The fracture surface at the rim was also tinted. Its color suggested lower temperatures caused by brake friction. The web fracture surface was clean. Figure 3 shows...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001597
EISBN: 978-1-62708-236-5
... at the journal surface indicating frictional heating ( Fig. 16 ). Fig. 16 Cracking, deformation, and a white hardened layer at the journal surface of Crank #1 Other areas exhibited similar signs of friction damage, although not as pronounced. The most severely damaged areas exhibited a 1 to 2 mm...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... Abstract Tribology is the study of contacting materials in relative motion and more specifically the study of friction, wear, and lubrication. This article discusses the classification and the mechanisms of friction, wear, and lubrication of polymers. It describes the tribological applications...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
...) Steady-state wear process where the wear and friction phenomena are influenced mainly by the shear and adhesive properties of the transferred film. Reprinted with permission from Ref 1 A distinction within the interfacial wear process may be made based on whether or not the frictional heat...