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Pitting (wear)

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Published: 01 January 2002
Fig. 46 Pitting and wear pattern on a carburized AMS 6263 steel impeller drive gear. Approximately 2.3× More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006384
EISBN: 978-1-62708-192-4
... of real cavitating conditions such as in a marine propeller or a hydraulic turbine. Pitting and Incubation Period Pitting is typically observed during the earlier stage of cavitation erosion, known as the incubation period, during which no significant loss of mass occurs. During this initial stage...
Image
Published: 01 January 2002
Fig. 30 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. 15×. (b) Higher-magnification view of shallow More
Image
Published: 01 January 2002
Fig. 35 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. 15×. (b) Higher-magnification view of shallow More
Image
Published: 15 January 2021
Fig. 42 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. Original magnification: 15×. (b) Higher More
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
... pitting density on the OD of the mate journal fillet. Fig. 16 Overall view of mate journal after bearing removal Fig. 17 Close-up view of mate journal. Left side of image is dust guard, then Tectyl-covered fillet, transitioning to seal wear ring area. Corrosion pits visible on journal...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
..., thousands, or even millions of cycles before the first wear particles are removed. Furthermore, the corners of pits or other RCW damage features may act as nucleation sites for additional fatigue cracks and spread the damage across the surface. Because RCF and RCW are so closely related, the causes...
Image
Published: 01 June 2012
to the crevice or pitting, leading to the release of metal ion M n+ . Fretting corrosion is caused by a combination of wear and corrosion phenomena at the surfaces of two moving metals, generating M n+ . More
Image
Published: 31 December 2017
Fig. 12 Cross-sectional profile and SEM images of smooth wear track on Al 2 O 3 disk formed by dry sliding friction against Al 2 O 3 pin in air. (a) Cross-sectional profile of smooth wear track. (b) Micrograph of smooth wear track with a remaining pit. (c) Micrograph of surface grains More
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002375
EISBN: 978-1-62708-193-1
... that must be considered in conjunction with the teeth. fatigue gear failure modes gear life gear wear impact fracture lubricants pitting failure stress rupture surface durability wear GEARS can fail in many different ways, and except for an increase in noise level and vibration...
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
... modes, which together account for more than half the failures studied, are tooth-bending fatigue, tooth-bending impact, and abrasive tooth wear. Failure modes of gears Table 1 Failure modes of gears Failure mode Type of failure Fatigue Tooth bending, surface contact (pitting...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003661
EISBN: 978-1-62708-182-5
..., Corrosion , Vol 13, ASM Handbook (formerly Metals Handbook , 9th ed.), ASM International, 1987, p 231–233. References References 1. “Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by the Use of Ferric Chloride Solution,” G 48, Wear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... materials with the aid of models and equations. It presents three examples of erosive wear failures, namely, abrasive erosion, erosion-corrosion, and cavitation erosion. abrasive erosion brittle materials cavitation erosion ductile materials erosion erosion corrosion EROSION...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005677
EISBN: 978-1-62708-198-6
... Abstract This article reviews friction and wear of various dental materials that have been studied by fundamental wear measurements, simulated service wear measurements, and clinical measurements. The materials include dental amalgam, composite restorative materials, pit and fissure sealants...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003327
EISBN: 978-1-62708-176-4
... Abstract Mechanical tests are performed to evaluate the durability of gears under load. Gear tooth failures occur in two distinct regions, namely, the tooth flank and the root fillet. This article describes the common failure modes such as scoring, wear, and pitting, on tooth flanks. Failures...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002373
EISBN: 978-1-62708-193-1
.... In many cases, bearing failure is now related to wear rather than to contact fatigue. Good surface finish is necessary for long bearing life. As was noted, contact fatigue is initiated by surface defects like dents and deep scratches. Surface defects not only cause asperity contact in thin-film...
Image
Published: 31 December 2017
Fig. 17 Micrographs of wear debris on single-crystal SiC {0001} surface after ten passes of SiC pin in vacuum. (a) Gross hexagonal pits on SiC pin. (b) Hexagonal and flat wear particle transferred to SiC flat. Vacuum pressure, 10 –8 Pa; room temperature More
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
... have imperfect alignment, and the gears slowly pit and “wear in,” after which the overall wear rate slows. (On larger teeth, the wear rate can be periodically monitored using a gear tooth caliper.) Failures are often the result of undetected wear, either due to inadequate lubrication or a lack of long...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
... of industries. This article describes the processes involved in erosion of ductile materials, brittle materials, and elastomers. Some examples of erosive wear failures are given on abrasive erosion, liquid impingement erosion, cavitation, and erosion-corrosion. In addition, the article provides information...
Image
Published: 30 August 2021
Fig. 34 Seal wear ring (inverted) below seal housing. Fretting wear can be seen on the inner cone at the bottom of the stack. The fractured journal was also cleaned in mineral spirits and then cut approximately 25 mm (1 in.) from the fracture surface. This was performed to enable the area More