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micropitting

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Image
Published: 01 January 2015
Fig. 21.39 Cracking along 30 and 80 degree bands and formation of micropitting in a carburized steel subjected to contact fatigue testing. Light micrograph, nital etch. Courtesy of T. Ochi, Nippon Steel Company. More
Image
Published: 01 September 2005
Fig. 13 Gear with micropitting (frosting) failure. Source: Ref 4 More
Image
Published: 01 September 2005
Fig. 4 Pitted gear teeth. Note micropitting at the pitch line, scattered macropits, and one area of gross pitting near the left end. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
..., dimensional stability, and generation of quenching and grinding cracks. They also include insufficient case hardness and improper core hardness, influence of surface carbon content and grain size, internal oxidation, structure of carbides, and inclusion of noncarbide. Details on micropitting, macropitting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... Rolling Tooth hammer Rippling (a) Ridging Burr Root fillet yielding Tip-to-root interference Contact fatigue Pitting (macropitting)   Initial   Progressive   Flake   Spall Micropitting Subcase fatigue Cracking Hardening cracks Grinding cracks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... Peening Brinelling Rippling (fish scaling) Ridging Bending (yielding) Tip-to-root interference Low-cycle fatigue (≤1000 cycles to failure) High-cycle fatigue (>1000 cycles to failure) Pitting Initial Superficial Destructive Spalling Micropitting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
.... Situations and concepts of pitting failures in gears Table 4 Situations and concepts of pitting failures in gears Description Recommended action Situation 1 Some micropitting and a few macropits on the pinion. No gear pitting. Scrap the pinion, even though it is still quite runnable...
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
...,” Technical Paper 821042, SAE International , 1982 10.4271/821042 • Webster M.N. and Norbart C.J.J. , An Experimental Investigation of Micropitting Using a Roller Disk Machine , STLE Trib. Trans. , Vol 38 , 1995 , p 883 10.1080/10402009508983485 Test Results Test...
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 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
.... Not etched. Original magnification: 60× The type of damage in conventional bearing steels from contact 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...
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
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
... ), taking the onset of gray staining (micropitting) as the failure criterion, determined that initial surface roughness has an effect on surface durability ( Fig. 8.17 ). The tangential load for surface-hardened gear teeth with a surface roughness (R max ) of ~1 μm is about ten times that of teeth where R...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9