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(Other, miscellaneous, or unspecified) wear

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092102
EISBN: 978-1-62708-234-1
... (frictional wear). No recommendations were made. Gears Lubrication Nylon (Other, miscellaneous, or unspecified) wear Figure 1 shows pitting on the tooth flank of a nylon oil-lubricated driving gear. The pitting produced numerous surface microcracks in association with large-scale fragmentation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092103
EISBN: 978-1-62708-234-1
... started mainly at the mechanically stressed tooth flanks. In addition, oil vapors, humidity, and other degradative agents could also have contributed to the observed failure. No recommendations were made. Boilers Gear teeth Microporisty Polyoxymethylene (Other, miscellaneous, or unspecified...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047387
EISBN: 978-1-62708-225-9
... composition Gear teeth Hardenability Sprockets Low-alloy steel (Other, miscellaneous, or unspecified) failure Induction-hardened teeth on a sprocket cast of low-alloy steel wore at an unacceptably high rate. A surface hardness of 50 to 51 HRC was determined; 55 HRC minimum had been specified...
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
... reoccurrence, specific inspection criteria were issued defining maximum limits for spline wear. A procedure and requirements were specified for installing the coupling and pinion gear at the next overhaul. Gas turbine engines Inspection Pinions Specifications Splines AMS 6470 UNS K24065 (Other...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001573
EISBN: 978-1-62708-226-6
.... Arcing Pitting (wear) Surgical implants Wire Ti-6Al-4V Titanium nitride coating UNS R56406 Surface treatment related failures (Other, miscellaneous, or unspecified) wear Background The TiN coated back surgery wires were made of Ti6A14V. The reported failure was the presence of pits...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047307
EISBN: 978-1-62708-223-5
... hardenability for the section size involved. Breaker bars Castings Retained austenite Wear resistance Fe-2.75C-19.5Cr-1.1Mo (Other, miscellaneous, or unspecified) wear The nominal composition of this chromium alloy cast iron was Fe-2.75C-0.75Mn-0.5Si-0.5Ni-19.5Cr-1.1Mo. The measured hardness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047935
EISBN: 978-1-62708-225-9
..., miscellaneous, or unspecified) wear (Other, miscellaneous, or unspecified) failure The electric motor in an office machine was producing intermittent noise. Ball bearings were suspected as the source of the noise and were removed from the motor and sent to the laboratory for examination. The bearings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001209
EISBN: 978-1-62708-224-2
... operating stress if they had been welded satisfactorily and hardened correctly, and whether it made any sense to case harden highly stressed chains of this type. Chains Gas carburizing Wear Welded joints Steel chain Joining-related failures (Other, miscellaneous, or unspecified) wear Heat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001499
EISBN: 978-1-62708-236-5
... position under a reverberating load for an extended period of time. Loads (forces) Reflection Spur gears Vibration 8622 UNS G86220 (Other, miscellaneous, or unspecified) wear Three spur gears that had formed a straight-line train in a speed reducer were brought in for examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001226
EISBN: 978-1-62708-234-1
... (Other, miscellaneous, or unspecified) wear A slide and the two guideways of a pump had to be disassembled already during run-in time after approximately 20h because they had galled completely, before the rated speed of 800 rpm was reached. Figure 1 shows a section of the worn surfaces...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001073
EISBN: 978-1-62708-214-3
... be improved by through hardening or induction surface hardening of the teeth. Catastrophic wear Chain drives Chemical processing industry Shafts (power) UNS G10200 UNS G10450 1020 1045 (Other, miscellaneous, or unspecified) wear Background Replacement sprockets ( Fig. 1 ) installed...
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
..., however, because the bushing had only a few microns of clearance. The effect caused the oil to squeeze out, resulting in metal-to-metal contact, and ultimately failure. Aircraft components Gear boxes Oil pumps Overheating Thermal stresses 32CrMoV 13 (Other, miscellaneous, or unspecified...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001530
EISBN: 978-1-62708-225-9
... the establishment of a well-protected transfer layer and leads to rapid wear. Failure Leaded bronze bearing Metallic wear debris Cu-7.6Sn-17.4Pb Cu-6.6Sn-5.8Pb (Other, miscellaneous, or unspecified) wear 1. Introduction Copper-based alloys have been of great practical importance in industrial...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
... Coated Al-Mg-Si Electroless nickel (Other, miscellaneous, or unspecified) failure Introduction Data storage disk drives are rightly called the minds of computers and are necessary for essentially all important functions of a computer. Disk drives are small complex machines consisting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001533
EISBN: 978-1-62708-225-9
... Steam turbines Wear tests Sn-13.5Sb-6.0Cu Sn-11.9Sb-4.5Cu Babbit (Other, miscellaneous, or unspecified) wear 1. Introduction The reliable operation of sliding bearings determines to a considerable extent the life and reliable operation of the steam turbine as a whole. 1 , 2 The cases...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001680
EISBN: 978-1-62708-221-1
... (Other, miscellaneous, or unspecified) wear Fatigue fracture Introduction Wire ropes are used in many heavy industrial applications, including mines, offshore oil rigs, and barges. Premature failure of ropes can be costly in any application. In mining applications, failures become not only...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
... be isolated from water and excessive heat. Water leaking into the vessel through a graphite seal may have initiated the reactions that caused the accident. Blenders Chemical processing equipment Explosions Stainless steel (Other, miscellaneous, or unspecified) failure Ductile fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Pumps Turbines Metal (Other, miscellaneous, or unspecified) failure (Other, general, or unspecified) fracture Cavitation wear Part I—Special Cases Case #1: Vibration in Hydroelectric Dam The entire structure of a hydroelectric dam would begin to vibrate whenever a hydroelectric turbine...