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single-tooth fatigue test

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Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... tend to show classical fatigue patterns with clear crack origins, beach marks, and distinct patterns of striations. For CP Ti Brånemark single-tooth replacements, striation morphology of fracture surfaces of fixture portions that had failed were consistent with CF and had a spacing on the order of 0.5...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... provides information on physics and testing of rolling-contact fatigue. Processes commonly used to produce bearings for demanding applications are also covered. coatings Hertzian contact theory rolling-contact fatigue rolling-element bearings surface-initiated fatigue wear ROLLING-CONTACT...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
...-static, finite-life, and infinite-life regimes ( Fig. 3 ). Fig. 3 S - N curve for cruciform metal-active-gas-welded joints (structural steel S355, ASTM A572 grade 5). LCF, low-cycle fatigue; HCF, high-cycle fatigue; P F , probability of failure Failure in S - N testing is typically...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... initiation. Source: Ref 12 Fig. 7 Unetched metallographic cross section through gear tooth showing subsurface fatigue crack formed by rolling contact. Original magnification: 132×. Source: Ref 12 Fig. 8 Unetched metallographic cross section through hardened steel roller test specimen...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005677
EISBN: 978-1-62708-198-6
... be 0.1 mm or less per year for acrylic resin teeth ( Ref 211 , 212 ) and less for porcelain teeth ( Ref 211 ). Clinical wear of a single acrylic tooth for one year has been measured from computer-generated data obtained from a reflex microscope and is 7.2 mm 3 ( Ref 213 ). Two-body abrasion of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... or wedge-shaped cracks at grain triple points • Reaction scales or internal precipitation • Some cold flow in last stages of failure Contributing factors • Load exceeded the strength of the part • Check for proper alloy and processing by hardness check or destructive testing, chemical analysis...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
... a service life of just 2 weeks. Heat treatment did not produce full hardness in gear teeth. Hardness at tooth face, 15 HRC; at tooth core, 82 HRB. Fig. 357 : Outside diameter of gear showing where teeth broke off. Fatigue pattern on fracture surfaces is typical of reversed bending even though the...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... modes of adhesive wear including scoring, scuffing, seizure, and galling, and describes the processes involved in classic laboratory-type and standardized tests for the evaluation of adhesive wear. It includes information on standardized galling tests, twist compression, slider-on-flat-surface, load...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000606
EISBN: 978-1-62708-181-8
.... 196 Surface of a bending-plus-torsional-fatigue fracture in an experimental 89-mm (3 1 2 -in.) diam tractor axle of AISI 1041 steel that had been induction hardened. Fracture occurred after 1212 h on an endurance-test track. Note beach marks fanning out from the fatigue-crack origin...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003988
EISBN: 978-1-62708-185-6
... billets for mechanical property testing are shown in Fig. 19 . Fig. 19 Forging modes used in production of billets for mechanical testing. Dimensions, given in inches, are average values. Longitudinal test specimens 10 mm (0.4 in.) in diameter (for tensile and fatigue testing) and 10.8 by...
Book Chapter

By Ted Kostilnik
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001235
EISBN: 978-1-62708-170-2
... 2 Effect of shot peening on fatigue strength of aluminum alloys and carbon and low-alloy steels Metal tested Type of specimen Stress cycle Surface condition as-received Aluminum alloys 2014-T6 Plain, 38 mm (1.5 in.) diam Reversed bending Smooth turned (a) 2024-T4 Plain...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005813
EISBN: 978-1-62708-165-8
... layer) of a case-hardened part is specified for functional surfaces (e.g., tooth flanks of gear wheels) as follows: Martensite is present, with a maximum of 20 to 30% retained austenite. Bone carbides or carbide networks are not permitted; finely dispersed carbides are permitted. Structure is...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003230
EISBN: 978-1-62708-199-3
... Abstract Visual inspection is a nondestructive testing technique that provides a means to detect and examine a variety of surface flaws, such as corrosion, contamination, surface finish, and surface discontinuities. This article discusses the equipment used to aid visual inspection, including...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... acting as mechanical fuses. Stress directors in helicopter gearing are also designed so that if gear tooth fracture occurs, only half the tooth breaks off. This leaves the other half of the gear tooth to carry the load, simultaneously creating sufficient vibration to warn the pilot of imminent failure...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005950
EISBN: 978-1-62708-166-5
... also discussed with an emphasis on the underlying philosophy for the selection and design of validation tests. The article also discusses the applications, capabilities, and limitations of heat treatment simulations via selected industrial case studies for a better understanding of the effect of...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005673
EISBN: 978-1-62708-198-6
..., all stainless steels strain harden to some level during processing. It is imperative that the device designer consider the requirements of the application when specifying the mechanical properties of a stainless steel product ( Ref 4 ). Three types of fatigue tests are used to develop...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005682
EISBN: 978-1-62708-198-6
..., incomplete sterilization can also lead to infection, as with improper packaging and shipping. After the implant is fabricated, both mechanical (tensile, wear, fatigue) and biological ( in vitro , in vivo ) testing must be conducted to determine its feasibility. While the mechanical testing processes have...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001320
EISBN: 978-1-62708-170-2
..., i Σ l i , in a P vs. i Σ l i plot obtained in indentation tests. Source: Ref 44 Table 2 Typical properties of cermets Composition Vickers hardness, kg/mm 2 Modulus of rupture, MPa Fracture toughness K Ic , MPa m Young's modulus, GPa (Ti,Mo/W...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... indicators of the different damage modes. With this knowledge, the possibilities can be narrowed down to probabilities. In failure analysis, many techniques are used to determine the physical cause of the problem. If the results of the different tests point toward the same sequence of damage, the...
Book Chapter

By Matthew Donachie
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003168
EISBN: 978-1-62708-199-3
... replacement component. More importantly, wear debris may not be biocompatible with the body. Under ideal conditions, mechanical property tests would be made in environments identical to that in the human body (i.e., in vivo). Practically, mechanical property tests are run either in normal air environments...