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nitriding depth

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001847
EISBN: 978-1-62708-241-9
... underneath. This led to further wear and an increase in friction between the sleeve and bearing bush. Fatigue crack initiation occurred at the root fillet because of stress concentration and large frictional forces. Insufficient nitriding depth facilitated the propagation of fatigue cracks. bearing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001761
EISBN: 978-1-62708-241-9
... damaged as a result of crankshaft failures. It was then decided to send the crankshafts for laboratory investigation to determine the cause of failure. The depth of the nitrided layer near fracture locations in the crankshaft, particularly at the fillet region where cracks were initiated, was determined...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001189
EISBN: 978-1-62708-218-1
... at the outer part of the teeth. The nitride layer did not stand up to the high and one-sided compressive stress applied in this case and could not prevent pitting. It could even have accelerated the wear by the incipient break down. Gas nitriding at greater depth under application of a suitable special steel...
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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048250
EISBN: 978-1-62708-236-5
... drum shaft. The worm and the worm gear were made of leaded cold-drawn 1113 steel and class 35-40 gray iron (nitrided in an aerated salt bath) respectively. The gearbox was found to contain fragments of the worm teeth and shavings that resembled steel wool. More than half of the worm teeth were revealed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
... Analysis on Failure Causes Conclusions References References 1. Steel-iron parts-determination of nitrided case depth and metallographic examination of nitriding structure , China Standard, GB1542–GB1589 ( 1990 ) 2. Berntd F. , Van Bennekom A. : Pump shaft failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... and oxygen content. The remaining portions of the samples were mounted and examined metallographically to determine nitridation attack depth and nitride morphology. The purpose of the experimental investigation was to determine the amount of growth attributable to nitrogen pickup in heat resistant alloys...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... to carburized and hardened samples. Nitriding process achieves good surface hardness @ 566 Hv1. However, case depth achieved is less within 10-μm; core hardness is 30 RC; case microstructure is fine tempered martensite; and push-out force for nitrided bearing cup is 1015 kg. Endurance test was also found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090114
EISBN: 978-1-62708-229-7
.... The cooling holes' surface was not coated. Investigation supported the conclusions that the cracking at the cooling holes was due to grain-boundary oxidation and nitridation at the cooling hole surface, embrittlement and loss of local ductility of the base alloy, temperature gradient from the airfoil surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... and material factors that cause a part to fail during heat treatment. The article discusses the problems associated with heating and furnaces, quenching media, quenching stresses, hardenability, tempering, carburizing, carbonitriding, and nitriding as well as potential stainless steel problems and problems...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001910
EISBN: 978-1-62708-217-4
... components were not in the nitrided condition as was required. This resulted in lower wear and fatigue resistance. These components also had a silicon content nearly double of that specified. The high silicon content lowered the notch tensile strength and toughness of the components. Breech bolts...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... aluminum etched with aqueous 0.5% hydrofluoric acid Fig. 11 Light micrographs of specimens of 1215 carbon steel that were salt bath nitrided and mounted in different resins. (a) Epomet thermosetting epoxy resin. (b) Phenolic thermosetting resin. (c) Methyl methacrylate thermoplastic resin. (d...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... W.E. Microscopy and the Study of Corrosion . Applied Metallography Van Nostrand Reinhold , 1986 , pp. 281 – 296 10.1007/978-1-4684-9084-8_17 9. “ Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens ,” E 1077, Vol 03.01 , American Society for Testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001748
EISBN: 978-1-62708-225-9
... K24065 (Other, miscellaneous, or unspecified) wear Made of AMS 6740, the shaft of Fig. 1 was nitrided to a depth of 0.009 to 0.013 in. It failed due to abnormal wear; spline failure of the power turbine gear caused an engine overspeed and disintegration. Excessive spline wear ( Fig. 2 ) resulted...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... and then microfracture of extruded slivers. At higher numbers of impacts, the wear rates of polished and ground specimens are almost the same and are characterized by the mechanism outlined in Fig. 16 . Fig. 19 Crater depth versus number of impacts for GS-44 silicon nitride counterfaces of varying surface finish...
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
... the rubbing surfaces, plus long-range cyclic stresses in the component. Those shear stresses, which are vital to cracking initiation, normally diminish rapidly as the crack grows to a depth below the fretting surfaces. In most cases, once the crack grows out of the immediate locality of the fretting area...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
... tool steel die that cracked during oil quenching. The die face contained numerous fine cracks. The left side of the die broke off during quenching. Figure 2(b) shows both sides of the fracture. Temper color (arrow), typical of the 205 °C (400 °F) temper used, is apparent. This indicates the depth...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... longitudinal splitting. Actual size Fig. 51 Failed AISI H26 exhaust-valve punch. (a) and (b) Longitudinal splitting of the punch caused by fatigue. Note the fracture progression starting from the top center at the punch. The punch surfaces were nitrided. (c) Top surface. Original magnification: 100...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
.... , Miedema K. , Scheetz J. , and Williams J. , Introduction of Nitrided M50 and M50NiL Bearings into Jet Engine Mainshaft Applications , Bearing Steel Technologies: Tenth Volume, Advances in Steel Technologies for Rolling Bearings , Beswick J. , Ed., ASTM International , West...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... at varying humidities. Source: Ref 32 Fig. 17 Crater depth vs. number of impacts for GS-44 silicon nitride counterfaces of varying surface finish impacted with a NBD-200 silicon nitride ball. Source: Ref 33 Fig. 18 Impact crater area vs. compressive residual stress for impacts normal...