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single-tooth single-overload test

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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
... loading • Single crack with no branching • Surface slip band emergence • Cleavage or intergranular fracture • Origin area may contain an imperfection or stress concentrator • Progressive zone: worn appearance, flat, may show striations at magnifications above 500× • Overload zone: may be either ductile...
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003988
EISBN: 978-1-62708-185-6
..., alloy development, and inclusion assessment; and process considerations, such as process stages, tool design, and secondary operations; of ferrous alloy powder forging. The mechanical properties of powder forged materials are also reviewed. The article discusses the quality assurance tests for powder...
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
... gear was driven in only one direction. 0.6×. Fig. 358 : Fracture surfaces of four teeth. Fatigue cracks propagated from both roots of each tooth. Arrows point to area of final overload on one tooth. 0.84× (Z. Flanders, Packer Engineering Associates, Inc.) Structure of fractured tooth from AISI...
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: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000606
EISBN: 978-1-62708-181-8
... originated at a forging defect (arrow). 3×. Fig. 240 : Close-up of failure origin. 0.75×. Fig. 241 : Oblique lighting reveals texture of fracture surface (compare with Fig. 240 ). Note beach marks associated with fatigue crack propagation. 0.75× (R.K. Bhargava, Xtek Inc.) Fig. 242 Single-overload...
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...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005924
EISBN: 978-1-62708-166-5
... voltage running high while the current is low?). Turn the power off and record the readings. If the power is sufficient to overheat the workpiece, cool it before reheating. Care must be taken not to overheat the workpiece during these tests. If the voltage is high, take out some turns on the...
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
... total of m tests on the stress level S a i with single results N i is given by the equation: (Eq 6) lg N 5 0 = 1 / m Σ lg N i The scattering is defined by the standard deviation: (Eq 7) s = 1 / (m − 1 Σ) ( lg N i − lg N 50 ) 2...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... unsafe or unreliable. Applied loads that exceed this limit are known as overloads and sometimes result (depending on the factor of safety used in design) in distortion or fracture of one or more structural members. Estimation of load limits is one of the most important aspects of design and is commonly...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004021
EISBN: 978-1-62708-185-6
... of simulation to plasticine deformation, and it was shown that the simulation was very accurate in predicting the material flow ( Ref 22 ). Fig. 43 Two-dimensional flownet of a single tooth in a bevel-gear forming process. The top and bottom dies move together. Fig. 44 Two-dimensional...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003986
EISBN: 978-1-62708-185-6
... control can cause overloading of the press when the billets are oversize and lack of fill when the billets are undersize. Fig. 4 Tool set for flashless forging Some forgers have been making spur gears with near-net teeth for some time ( Ref 5 ). In the early work, when the technical...
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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... methods can be used in (but are not necessarily limited to) situations where failures result from overloading, stress corrosion, fatigue, stress concentrations, or inappropriate manufacturing processes. X-ray diffraction residual-stress analysis methods can also be applied to the evaluation of corrective...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.9781627081719
EISBN: 978-1-62708-171-9