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micropitting

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... hardness, influence of surface carbon content and grain size, internal oxidation, structure of carbides, and inclusion of noncarbide. Details on micropitting, macropitting, case crushing, pitting corrosion, and partial melting are also provided. References References 1. Raja B.V.R. , Pal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... of gear failure analysis. contact fatigue failure analysis fatigue failure gears macropitting micropitting rolling-contact fatigue scuffing spalling stress rupture subcase fatigue thermal fatigue wear GEARS can fail in many different ways, and except for an increase in noise level...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... Low-cycle fatigue (≤1000 cycles to failure) High-cycle fatigue (>1000 cycles to failure) Pitting Initial Superficial Destructive Spalling Micropitting Frosting Gray staining Peeling Subcase fatigue (case crushing) Plowing Adhesion Normal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... almost never occurs before 10,000 contacts. Pitting is a fatigue failure where small cracks form in the tooth surface and then grow to the point where small, round bits of metal break out of the tooth surface ( Fig. 4 ). Fig. 4 Pitted gear teeth. Note micropitting at the pitch line, scattered...
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
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
...Characteristics of contact stress fatigue Table 2 Characteristics of contact stress fatigue Characteristic Surface pitting Subsurface pitting Subcase fatigue Location of origin Surface, often at “micropits” Short distance below surface, usually at a nonmetallic inclusion Near...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... fatigue involves micropitting, macropitting, and spalling ( Fig. 16.10 ). In hybrid ceramics coatings and overlay coatings, the damage typically involves delamination ( Fig. 16.11 ). Factors influencing contact fatigue life of hardened steel bearings and gears can be roughly classified into four...
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
... Characteristic Surface pitting Subsurface pitting Subcase fatigue Location of origin Surface, often at “micropits” Short distance below surface, usually at a nonmetallic inclusion Near case-core boundary in case-hardened parts Initial size Small Small Large Initial area:depth ratio Small...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
... strength of ground surfaces is favored by base oil, whereas the best results for polished surfaces are obtained when an extreme pressure lubricant is used. Nakanishi et al. ( Ref 23 ), taking the onset of gray staining (micropitting) as the failure criterion, determined that initial surface roughness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... Surface pitting Subsurface pitting/spalling Case crushing Location of origin Surface, often at micropits Short distance below surface may be at nonmetallics Probably at case-core interface Appearance Shallow Shallow Deep ridged Initial size Small Small Large Initial area-depth...