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Pitting (wear)

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... be considered in conjunction with the teeth to enhance fatigue life. bending stress fatigue life gears gear tooth impact fracture life prediction surface durability pitting wear GEARS can fail in many different ways, and except for an increase in noise level and vibration, there is often...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... is that, instead of causing gross fractures of parts, only fragments of the surface are removed, at least initially. These fragments, when lost, result in pits or cavities in the surfaces. This type of pitting wear, or contact stress fatigue, frequently is the limiting factor in the component’s load-carrying...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... cast iron water pump impeller. The sharp corners of the (a) new impeller have been (b) completely rounded off by the abrasive wear of sand in the cooling system. Source: Ref 4 Fig. 16 Subsurface-origin pitting fatigue. (a) Sketch showing usual origin slightly below the surface where...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630211
EISBN: 978-1-62708-270-9
... a subtle influence on many types of failure, particularly those involving fracture and/or wear. The types of corrosion considered here are galvanic, uniform, pitting, crevice, microbiologically influenced corrosion, stress-corrosion cracking, and corrosion fatigue. There are other categories...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... and Lubrication,” nonlubricated-related failures include both overload and bending fatigue types of failure. Lubricated-related failures include Hertzian fatigue (pitting), wear, and scuffing. In Ref 4 , gear failure modes were broken down into two groups: Failure modes on gear tooth flanks, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... Durability of Case-Carburized Gears—On a Phenomenon of Grey Staining of Tooth Surface,” Paper No. 80-C2/DET-27, American Society of Mechanical Engineers , 1980 , p 1 – 8 10. Winter H. and Weiss T. , “Some Factors Influencing the Pitting, Micropitting (Frosted Areas) and Slow Speed Wear...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250311
EISBN: 978-1-62708-345-4
... Failure modes on tooth flanks are caused by this combination of rolling and sliding. The more common failure modes are scoring (or scuffing), wear, and pitting. Failure of the gear tooth also can occur in the root fillet. This failure is primarily due to bending fatigue but can be precipitated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... Research and development applications for ion implantation Surface properties modified Substrates studied Ions species used Comments Wear Steels, WC, Ti, Co/Cr alloys, TiN coatings, electroplated Cr N, C Ti, Co/Cr alloys largest use commercially in orthopedic devices  10–20 at.%  ≥10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
... was forced to turn as it entered the boiler. Fig. 6 Erosion of a rotary valve handling dust from a cyclone. The wear plates in the valve show some material loss, but the major damage is to the casing. Gaps between the casing and the valve allowed leakage of high-velocity air with entrained dust...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
...Fracture mode identification chart Table 1 Fracture mode identification chart Method Instantaneous failure mode (a) Progressive failure mode (b) Ductile overload Brittle overload Fatigue Corrosion Wear Creep Visual, 1 to 50× (fracture surface) Necking or distortion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... at which this wear was observed, the combustion chamber was designed to have a nominal clearance from a concentric housing around it, with cooling water flowing through the intervening annular space. The region of maximum wear was on the same side of the chamber as the region of severest pitting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... flowing through copper pipe. The typical horseshoe-shaped pits point upstream. Original magnification: 0.5×. Source: Ref 16.2 Fig. 16.5 Schematic illustration of one process by which a particle of wear debris is detached during adhesive wear (note that the peaks are greatly exaggerated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460277
EISBN: 978-1-62708-285-3
... Gas Sprayed Stellite 6 Coatings and Their Wear Resistance , J. Mater. Sci. Eng. , Vol 2 ( No. 2 ), 2013 , open access journal 11.32 “ Cast Iron Engine Block Modification Using SST Cold Spray ,” CenterLine Supersonic Spray Technologies, July 2012 , http://supersonicspray.com/knowledge-docs...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
...Comparison of carburizing and carbonitriding processes Table 1 Comparison of carburizing and carbonitriding processes Process Comments Carburizing Hard, highly wear-resistant surface (medium case depths), excellent contact load potential, good bending fatigue strength, good seizure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
...., chromium, copper, or nickel). Protection is effective until the coating is penetrated, either by a pit, pore, crack, or by damage or wear. The substrate will then corrode preferentially to the coating (since it is anodic to the coating material), and corrosion products will lift off the coating and allow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... power-transmission devices often wear by a mechanism of surface fatigue. Repeated point or line contact stresses can lead to subsurface cracks that eventually grow to produce surface pits and eventual failure of the device. Prevention is possible through the use of through-hardened steels, heavy case...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270175
EISBN: 978-1-62708-301-0
... Procedure and Results Failure of hydraulic pumps fitted in an aircraft was reported from some of the operating units. On disassembly, the plungers in the cylinders were found seized. The damage is attributed to cavitation erosive wear, with corrosion adding to the problem. Hydraulic pumps in one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820203
EISBN: 978-1-62708-339-3
... , 1980 , p 163 10.3323/jcorr1974.29.4_163 20. “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 and Erosion; Metal Corrosion , Vol 03.02 , Annual Book of ASTM Standards , American...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870179
EISBN: 978-1-62708-299-0
.... The composites were found to corrode faster than the matrix alloys under all the conditions studied. This was attributed to the mica particles preventing the formation of a continuous passive film and providing sites for pitting and crevice corrosion. Under erosion-corrosion and corrosive wear conditions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870191
EISBN: 978-1-62708-299-0
... molds Castings None HardCr 51 2 Appearance; corrosion resistance Aircraft applications Hydraulic parts; landing gears; small engine pistons Forgings Machine and zincate Cu flash + Cu + hardCr 2.5 + 25 + 76 0.1 + 1 + 3 Wear resistance Propellers Forgings Conductive rubber coating...