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insufficient nitriding

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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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... punch was a clear indication of high temperature exposure (due to insufficient cooling) during application. The most probable cause of failure was thermal fatigue. Grain boundaries Precipitation Punches WR-95 Chromium nitride coating Thermal fatigue fracture Background Observations...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... clutch was removed in an effort to reduce cost and hence the shaft was subjected to increased vibration and shock loading. Insufficient fatigue limit of the shaft was revealed by fatigue testing of the shafts taken from stock in a rotating-beam machine. As a corrective measure, the fatigue limit...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001251
EISBN: 978-1-62708-235-8
..., the aluminum addition was reduced by one-half. Since then, there have been no additional rejects due to insufficient tensile and bend values. Castings Cracking (fracturing) Flanges Nonmetallic inclusions Tension tests Fe-0.22C GS C 25 (Other, general, or unspecified) fracture In a steel...
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
... of titanium nitrided M2 tool steel gear hobs. The hobs were used to produce carbon steel ring gears Applications Circumstances Leading to Failure Sample Selection The hob exhibited excessive wear and fracturing on the leading surfaces of the cutting teeth, as shown in Fig. 1 and 2 . Fig...
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 long-range cyclic stresses (for example, bending in a shaft) are enough to cause continued fatigue crack growth. In a small number of cases, however, the long-range stresses in the body of the component are insufficient to cause continued propagation. 4 In those cases, the result is shallow...
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
... insufficient lubrication chromium steel circumferential wear marks peel pits heat tinting fatigue striations SEM imaging fatigue strength 42CrMo (chromium-molybdenum alloy steel) 38CrMoAl (chromium-molybdenum-aluminum alloy steel) Background Investigation Methods Observation Results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091362
EISBN: 978-1-62708-220-4
...) supported the conclusion that failure of the nozzle weld was the result of intergranular corrosion caused by the pickup of interstitial elements and subsequent precipitation of chromium carbides and nitrides. Carbon pickup was believed to have been caused by inadequate joint cleaning prior to welding...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... by buckling-induced fracture. (c) Low-cycle fatigue fracture. Source: Ref 8 Fig. 14 Deformation from threads that left impressions on the inside surface of a hole as the members sheared with respect to each other. Fig. 13 Gas-nitrided 4140 steel (27–31 HRC) drive-gear assembly...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
...) is satisfactory Fig. 10 4140 steel slat track from a military aircraft wing. The track bent because one end did not become fully austenitic during heat treatment, producing a low-strength structure of ferrite and tempered martensite. Fig. 13 Gas-nitrided 4140 steel (27–31 HRC) drive-gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
... with the broken off neck. In the centre of the fracture is a darkly tinted excentric flaw ( Fig. 2 ). Such internal cracks occur when a cast or forged work piece is heated up too quickly and insufficiently thoroughly for the anneal. The thermal expansion of the outer zone puts the central core under tensile...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001254
EISBN: 978-1-62708-225-9
... deoxidation with aluminum gave rise to the conclusion that the damage was caused by precipitation of aluminum nitride onto the primary and austenitic grain boundaries, subsequent determinations were made of aluminum and nitrogen content and the following values were found: They are arranged according...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
.... Source: Ref 15 , 48 Fig. 8 Example of seizure on a piston due to insufficient cooling. Source: Ref 49 Fig. 9 Initial galling failure on powder metallurgy tool steels. Reprinted from Ref 57 with permission from Elsevier Fig. 10 Surface damage typical of galling wear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Cristobalite, silica SiO 2 1723 3133 Carborundum, silicon carbide SiC 2700 (a) 4892 (a) Silicon nitride Si 3 N 4 1800 (b) 3270 (b) Boron nitride BN 3000 (a) 5430 (a) (a) Sublimes. (b) Dissociates Fig. 1 Metal dusting attack on the inner wall of a stainless...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001471
EISBN: 978-1-62708-221-1
... in the region of the origin of the fracture. This latter region was also examined at high magnification with a view to detecting the presence of any embrittling constituents such as cementite films at grain boundaries or precipitated nitrides but none were seen. The chemical composition of the material...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... Misrun E 122 Casting incomplete due to insufficient metal poured Poured short E 123 Casting incomplete due to loss of metal from mold after pouring Runout E 124 Significant lack of material due to excessive shot-blasting Excessive cleaning E 125 Casting partially melted...
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
.... Bearing-Load Ratings Bearing-load ratings are based on results of laboratory rolling-contact fatigue tests that have been conducted under conditions as near ideal as possible. Any departure from these reasonably ideal conditions, such as misalignment, vibration, shock loading, insufficient...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
...—or insufficient deformation during forging. If the work is subjected to nonuniform deformation or is worked at a rate and temperature outside the optimal conditions for dynamic recrystallization, a texture is formed ( Ref 6 , 8 ). Nonuniform grain size will reduce the ductility and strength of the part...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... Surface hardening, nitriding, carburizing, anodic hard coating Excessive case thickness, microcracks, embrittled material at stress raisers Machining Tool marks, grinding cracks Welding Weld-metal defects, hydrogen-induced cracking, inclusions, improper structure The primary purpose...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1