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nitriding

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001676
EISBN: 978-1-62708-229-7
... case, nitriding and embrittlement occurred at temperatures as low as 300 to 400 deg C (determined from an examination of the oxidation of the Zircaloy-2 carrier rod on which the detectors were mounted). Recent results are described and discussed in terms of the oxidation and nitriding kinetics...
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Published: 30 August 2021
Fig. 23 (a) Broken tooth in chuck jaw after hardening and nitriding. (b) Micrograph showing initiation of crack in brittle white layer and propagation along nitride formed in austenite grain boundaries. Original magnification: 300× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0092155
EISBN: 978-1-62708-221-1
... and the adjacent splined coupling sleeve. Specifications included that the gear and coupling be made from 4140 steel bar oil quenched and tempered to a hardness of 265 to 290 HB (equivalent to 27 to 31 HRC) and that the finish-machined parts be single-stage gas nitrided to produce a total case depth of 0.5 mm...
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Published: 01 June 2019
Fig. 3 Edge structure of a nitride plunger. Nitride layer peeled off because of decarburisation. Cross section, etched in picral. 100 × More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
... homogenization of the carbides in the resultant hob, and lower sulfur content. Carbides Coatings Hobbing cutters Microstructural effects Sulfur Wear M2 UNS T11302 Brittle fracture Background A gear manufacturer reported recurring premature failures of titanium nitrided M2 tool steel gear...
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Published: 01 June 2019
Fig. 7 Micrographs and line scans of the surface layer of a nitrided Inconel 600 lead cable: (a) micrograph showing the location of point analysis and linescan; (b) Auger linescans across the surface layer; and, (c) nitrogen map. More
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Published: 01 June 2019
Fig. 5 Oxidation and nitride formation along the crack sides and the crack tip. Magnification = 100 × More
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Published: 01 June 2019
Fig. 8 As-cast sample of KHRSA. Nitridation damage visible around areas of I.D. shrinkage porosity. 12.5 × Magnification, Modified Murakami's etchant 3V, 20 s. More
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Published: 01 June 2019
Fig. 1 Gas-nitrided 4140 steel (27–31 HRC) drive-gear assembly in which gear teeth deformed because of faulty design and low core hardness. Details A and B show deformed areas on drive-gear teeth and mating internal splines. Dimensions given in inches More
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Published: 01 June 2019
Fig. 9 Aluminium nitride precipitates in transmission lacquer replica. 40 000 × More
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Published: 01 December 2019
Fig. 12 Core microstructure of nitrided specimen Nital 3% ×100 More
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Published: 01 December 2019
Fig. 13 Case microstructure of nitrided specimen Nital 3% ×100 More
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Published: 01 December 2019
Fig. 14 Case microstructure of nitrided specimen Nital 3% ×200 More
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Published: 01 December 2019
Fig. 3 The nitrided layer at failure More
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Published: 01 December 1993
Fig. 1 Overall view of titanium nitride-coated hob. Approximately.1× More
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Published: 01 January 2002
Fig. 5 Subsurface fatigue origin in-service failure of 6.4 cm (2.5 in.) nitrided medium-carbon alloy steel crank pin. In contrast with the fracture surface shown in Fig. 4 , produced in the laboratory under continuous uniform loading, this surface exhibits beach marks. Courtesy of G.J. Fowler More
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Published: 01 January 2002
Fig. 1 SEM images of (a) IG fracture in ion-nitrided layer of ductile iron (ASTM 80-55-06), (b) transgranular fracture by cleavage in ductile iron (ASTM 80-55-06), and (c) ductile fracture with equiaxed dimples from microvoid coalescence around graphite nodules in a ductile iron (ASTM 65-40-10 More
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Published: 01 January 2002
Fig. 4 Both halves of a silicon nitride bar broken in bending. The tensile surfaces are in contact with each other. The fracture origin appears to be a hole (pore) in the bottom piece, but the origin is really an inclusion, as seen on the top piece. Optical microscope; reflected light; picture More
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Published: 01 January 2002
Fig. 5 Silicon nitride rod broken in uniaxial tension. Fracture origin is at the top of the image. Optical microscope; reflected light (direct illumination); picture width ∼5 mm More
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Published: 01 January 2002
Fig. 6 Silicon nitride rod broken in uniaxial tension. The same rod shown in Fig. 5 . Fracture origin is at the top of the image. Optical microscope; reflected light (oblique illumination); picture width ∼5 mm More