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contact fatigue

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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
..., carbonitriding, and nitrocarburizing. The discussion on carburizing addresses several interrelated factors, including processing principles, alloying, surface oxidation, residual stresses, bending fatigue, contact fatigue, and fracture. carbonitriding carburizing ferritic nitrocarburizing flame...
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
..., namely dimensional, surface finish texture, metallurgical, and residual stress. The following section presents the tests that simulate gear action, namely the rolling contact fatigue test, the single-tooth fatigue test, the single-tooth single-overload test, and the single-tooth impact test. Finally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
..., toughness, and fatigue resistance. It likewise explains how carbon affects case hardenability, surface hardness, and case toughness and how case depth influences residual stresses and bending and contact fatigue. It also discusses the effect of quenching methods and addresses the issue of distortion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770171
EISBN: 978-1-62708-337-9
...; 50KhNi: 0.5% C, 0.6% Mn, 0.6% Cr, 1.2% Ni, <0.3% Cr; ShKh15:1.0% C, 1.5% Cr, <0.3% Ni, <0.25% Cu. (b) Distortions in crystal lattice in α solid solution Contact fatigue life of case-hardened 16CD4 steel Table 7.19 Contact fatigue life of case-hardened 16CD4 steel Additional...
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 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... contact (pitting or spalling), rolling contact, thermal fatigue Impact Tooth bending, tooth shear, tooth chipping, case crushing, torsional shear Wear Abrasive, adhesive Stress rupture Internal, external In an analysis of more than 1500 studies, the three most common failure modes, which...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870237
EISBN: 978-1-62708-344-7
... effects, foreign particles, and stresses generated by rolling contact. crack growth crack initiation dislocations fatigue mechanism plasticity rolling contact Introduction There has always been an aura of mystery regarding why metals, and materials in general, fail in fatigue...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770051
EISBN: 978-1-62708-337-9
... of the austenitization temperature of heating before quenching in the ratio of structural components and the composition of the matrix of the case-hardened layer on the contact fatigue Table 3.2 Effect of the austenitization temperature of heating before quenching in the ratio of structural components...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770077
EISBN: 978-1-62708-337-9
..., which approximates to the “knee” of the S-N curve. Source: Ref 28 Fig. 4.22 Effect of austenitizing temperature on hardness, amount of retained austenite, and contact fatigue strength of 90KhGNMFL steel under a 3.43 GPa (350 kgf/mm 2 ) load. Source: Ref 32 Fig. 4.23 Effect...
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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250227
EISBN: 978-1-62708-345-4
.... Nitriding produces a wear- and fatigue-resistant surface on gear teeth and is used in applications where gears are not subjected to high shock loads or contact stress. It is useful for gears that need to maintain their surface hardness at elevated temperatures. Gears used in industrial, automotive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
... 4028 Shot peened 62.2 36 1.1 0.044 2265 329 1035 150 (a) Converted from HRA. (b) Distance to 510 HV Fig. 8.25 Relationship between fatigue limit at 10 7 cycles and contact stress for case-hardened 20Kh2N4A test pieces (7.5 mm diam, 1.1 to 1.5 mm case depth). Source: Ref...
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
... (a) Up, toward top; down, toward root. (b) Negative sliding: rolling and sliding are in opposite directions. (c) Positive sliding: rolling and sliding are in the same direction. Source: Ref 7 Characteristics of contact-stress fatigue Table 2 Characteristics of contact-stress fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
... to are bending-fatigue strength, contact-fatigue resistance, hardness, and wear resistance. These properties were chosen because it is to promote one or more of these properties that the carburizing treatment is employed. A gear tooth is a good example in which each of these must be considered. Some significance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
..., sliding, and combined effect Fig. 16.9 Crack origin subsurface in a gear tooth section due to rolling-contact fatigue. Progression was parallel to surface and inward away from surface. Not etched. Original magnification: 60× Fig. 16.10 Typical morphology of fatigue spall in rolling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250039
EISBN: 978-1-62708-345-4
... fatigue fracture gears iron-base alloys magnesium alloys rolling contact fatigue surface-hardening steels through hardening wrought steel GEAR MATERIALS can be broadly classified into two groups: nonmetallic and metallic materials. Nonmetallics are the plastics, both thermoplastic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770011
EISBN: 978-1-62708-337-9
... 3 5 1 155 93 81 6 880 758 733 12 2400 2290 2180 Fig. 1.25 Contact fatigue life in relation to the amount of material removed from carburized SAE 8620 samples prior to testing. The hatched band represents the depth of internal oxidation beneath the original surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220519
EISBN: 978-1-62708-259-4
... S.A., RJ, Brazil. Fig. 15.31 Radial section of a railway wheel. Region immediately below the tread. Fine pearlite. Etchant: nital 2%. Cracks caused by contact fatigue. Courtesy of MRS Logística S.A., RJ, Brazil. Fig. 15.12 AISI 4145 steel quenched and tempered. Tempered martensite...
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 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
...-contact fatigue appears like wear in early stages Multiple intergranular fissures covered with reaction scale Grain faces may show porosity Metallographic inspection, 50 to 1000× (cross section) Grain distortion and flow near fracture Irregular, transgranular fracture Little...