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galling wear

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046371
EISBN: 978-1-62708-234-1
... had not seized, and there was no evidence of heat discoloration in the galled areas. The inner cone, made of modified 4720 steel and carburized for wear resistance, rode on an AISI type 630 (17-4 PH) stainless steel spacer. Consequently, it was desirable to determine whether the galled spots contained...
Image
Published: 01 June 2019
Fig. 1 Evidence of galling, or adhesive wear, on the inner surface of a carburized 4720 steel inner cone of a roller bearing. Galling was confirmed by the use of electron probe x-ray microanalysis. More
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
... modes of adhesive wear including scoring, scuffing, seizure, and galling, and describes the processes involved in classic laboratory-type and standardized tests for the evaluation of adhesive wear. It includes information on standardized galling tests, twist compression, slider-on-flat-surface, load...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
.... A maintenance lubrication program was not suggested, but galling could be reduced by periodic application of a solid lubricant. Bolts Galling Molybdenum disulfide Solid lubricants Wear resistance 4140 UNS G41400 Abrasive wear Heat treating-related failures Figure 1 shows a bolt...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... of microscopic welding at the interface between two mutually soluble metals. Adhesion is a major contributor to sliding resistance (friction) and can cause loss of material at the surface (wear) or surface damage without a loss of material at the surface (e.g., galling or scuffing). Adhesive wear typically...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... of microscopic welding at the interface between two mutually soluble metals. Adhesion is a major contributor to sliding resistance (friction) and can cause loss of material at the surface (wear) or surface damage without a loss of material at the surface (e.g., galling or scuffing). Adhesive wear typically...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001138
EISBN: 978-1-62708-231-0
... effects, failure of the thread structure of the clevis occurred. The failure occurred where the cylinder rod screws into the clevis. The rod was manufactured from 1045 steel. Cylinder rods Fretting fatigue Galling Railroad wheels 1045 UNS G10450 Fatigue fracture Fretting wear A. Design...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
.... After disassembly, it was noted that the surface of the journals had been heavily scored, and the inside of the inner seal wear ring contained unique wear patterns ( Fig. 7 , 8 ). In one case, the seal wear ring had cracked ( Fig. 8 ). Fig. 7 Black arrows indicate galling damage. Note...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046222
EISBN: 978-1-62708-217-4
... Abstract The spindle of a helicopter-rotor blade fractured after 7383 h of flight service. At every overhaul (the spindle that failed was overhauled six times and reworked twice), any spindle that showed wear was reworked by grinding the shank to 0.1 mm (0.004 in.) under the finished diam...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003558
EISBN: 978-1-62708-180-1
... of the former would be situations where marring is a concern, such as with optical scanner windows, lens, and decorative finishes. Examples of the latter include valves, which can fail because of galling, and structural components, where cracks caused by wear can reduce fatigue life ( Ref 1 , 2 ). In addition...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... to the failure examination. durability fatigue gear failures gear strength gears gear-tooth impact stress rupture wear GEARS can fail in many different ways, and except for an increase in noise level and vibration, there is often no indication of difficulty until total failure occurs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0092148
EISBN: 978-1-62708-235-8
... and cylinder from a failed valve revealed some burnishing, apparently the result of contact between the spool and the inside cylinder wall. Measurement of the surface profile of the spool showed no evidence of wear or galling. When this profile was compared with that of a spool from a valve that operated...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... analysis of sliding bearings are also covered. Finally, the article discusses wear-damage mechanisms from the standpoint of bearing design. bearing design elastohydrodynamic lubrication failure analysis lubricants sliding bearings wear MECHANICAL EQUIPMENT usually contains moving parts...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... cost bearings are bushings of molded polymers (plastics) in which steel shafts rotate. The lowest cost polymers are the nylons and acetals. At low sliding speeds, they usually wear by abrasion due to dirt or the roughness of the surface of the shaft. Polymers have two disadvantages—their low...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... of sudden severe adhesive wear as galling.) Scuffing is considered as mild when it is limited to a small area on the gear, and moderate when it occurs in patches over a large portion of the teeth. Severe scuffing usually grows continually worse and can rapidly destroy the gears, especially in high-speed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
..., and wear failures. The article provides information on the synthesis and interpretation of results from the investigation. Finally, it presents key guidelines for conducting a failure analysis. chemical analysis corrosion failure corrosion testing data collection failure analysis fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... assemblies in the control rod drive head of a pressurized water reactor, (3) thermal fatigue of a recirculation pump shaft in a boiling water reactor, and (4) failure of pump seal wear rings by nickel leaching in a boiling water reactor. Corrosion Decontamination Intergranular stress corrosion...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... plating on an A286 superalloy fastener subjected to service temperatures above 315 °C (600 °F) (the melting temperature of cadmium is 320 °C, or 610 °F). Two metals specified for use in a wear application could sustain galling if the metals are similar (atomic number) and mutually soluble, such as sliding...