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single-tooth overload test

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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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320133
EISBN: 978-1-62708-347-8
... depths for alloy steel gears Diametral pitch (DP) of tooth Case depth mm in. 20 0.127–0.254 0.005–0.010 16 0.203–0.330 0.008–0.013 10 0.305–0.457 0.012–0.018 8 0.356–0.508 0.014–0.020 6 0.406–0.559 0.016–0.022 4 0.508–0.711 0.020–0.028 Nitriding Cycle Time...
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
... field illumination. (c) Nitride case with an increase in continuous grain boundary nitride; maximum acceptable for grades A and B tooth tip. Dark field illumination. (d) Nitride case with complete grain boundary nitrides; not acceptable for grades A or B. Dark field illumination Overload...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... 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 pitting, scuffing, and wear Failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... process for contour hardening this gear was presented. Figure 1.1 shows the contour pattern produced at that time by Caterpillar. Caterpillar must be considered the early pioneer in the contour hardening of gear teeth. Fig. 1.1 Hardness survey (Rockwell C scale) of hardened tooth, sectioned...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... where very little power is involved. Worm Gears In a single-enveloping worm gear set, in which the worm is cylindrical in shape, several teeth may be in mesh at the same time, but only one tooth at a time is fully engaged. The point (or points) of contact in this type of gear set constitutes too...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... gear, carburized and hardened to 60 HRC in the case. It can be seen that tooth A fractured first, for it has the largest fatigue area, originating in the fillet on the arrow side of the tooth. Gear teeth are carefully shaped cantilever beams and can be diagnosed in this way. Fracture of the first tooth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
...Abstract Abstract This chapter reviews the knowledge of the field of gear tribology and is intended for both gear designers and gear operators. Gear tooth failure modes are discussed with emphasis on lubrication-related failures. The chapter is concerned with gear tooth failures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... for case depth (and quality) assessment, the case depth measurements must be at the locations specified by the designer. If no locations are specified, the primary test location must be at a critical area (for gear teeth this is near the lowest point of single tooth contact). If test pieces are employed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
...-by-tooth induction hardening of gear wheels. Source: Ref 19 Fig. 27 (a) Single-shot inductors used for both track (lobes) and shaft of this automotive component. The part is sectioned and acid etched to show the hardness pattern. All tracks are hardened at the same time using 250 kW/30 kHz...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250039
EISBN: 978-1-62708-345-4
... important approach to the fatigue evaluation of carburized steels. An example of component testing is the bending fatigue testing of single teeth in gears ( Ref 11 ). Gears are fabricated, carburized, and mounted in a fixture so that one tooth at a time is subjected to cyclic loading. More recently...
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 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
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
... hardness near 60 HRC. (d) Cross section through a gear tooth showing subcase-origin fatigue cracks similar to those sketched in (a). The original fatigue cracks are those parallel to the surface below the dark etched case. When these cracks join, the cracks to the surface then complete removal of the large...
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...
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
... , 1978 , p 1553 – 1560 10.1007/BF02661937 21.42 Van Thyne C. and Krauss G. , A Comparison of Single Tooth Bending Fatigue in Boron and Alloy Carburizing Steels , Carburizing, Processing, and Performance , Krauss G. , Ed., ASM International , 1989 , p 333 – 340 21.43...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200007
EISBN: 978-1-62708-354-6
... weighing 314 lb is welded onto a bucket to hold the digger teeth. The nose to the left is cored and has a tolerance of ±.015 inches. One type of tooth, Figure 2-52 , is employed with three different bases for mounting on buckets of varied design. Fig. 2-50 Dipper bucket with removable cast steel...
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
... on Propagation of Fatigue Cracks in Carburised Cases of Toothed Elements , Heat Treatment ’84 , The Metals Society , p 39.1 – 39.9 9. Vasil’ev L.A. , Retained Austenite and Hardness of the Carburised Case on Steel 18Kh2N4VA after Quenching in Two Different Media , Met. Sci. Heat Treat. , Vol 14...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... of distance from surface. Source: Ref 47 Fig. 5.28 Dendritic microsegregation in a fractured gear tooth.2× Fig. 5.29 Section through a forged sliding clutch hub. 0.8× Fig. 5.30 Microstructure of an air-cooled carburized bar end. 50× Fig. 5.27 Effect of homogenization...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900251
EISBN: 978-1-62708-358-4
... fracture, which because of its appearance is termed “fishscale” fracture. The lower toughness of high-speed steels that have coarsened discontinuously generally makes them unfit for cutting tool service. A tracing of discontinuous coarsening in T1 steel has been shown in Fig. 5-14 , where a single, very...