Formation of fretting fatigue cracks in 7075-T7351 aluminum alloy

Alic, J. A.; Hawley, A.L.; Urey, Judy M.

doi:10.1016/0043-1648(79)90238-2

Cited by 30 publications

(4 citation statements)

References 10 publications

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“…One of the representative textures for the fretting fatigue problem was a number of grain‐sized micro‐cracks initiated at the subsurface . Fretting wear and contact stresses can account for this phenomenon.…”

Section: Resultsmentioning

confidence: 99%

“…One of the representative textures for the fretting fatigue problem was a number of grain-sized micro-cracks initiated at the subsurface. 23,24 Fretting wear and contact stresses can account for this phenomenon. The plastic deformation in the subsurface induced by huge contact stress can induce the initiation of the fatigue cracks.…”

Section: Fractography Analysismentioning

confidence: 99%

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An investigation on rotatory bending fretting fatigue damage of railway axles

Song

Shen

Lin

et al. 2013

Fatigue Fract Eng Mat Struct

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Fretting damage failure analysis of a Chinese carbon railway axle RD2 was carried out. The wheel hub was in situ cut to expose the damaged surface of the wheel seat to avoid additional damage. A small‐scale axle test rig was developed, and simulation tests were performed at different rotator speeds of 1800 and 2100 rpm. The wear mechanism of fretting damage areas was a combination of abrasive wear, oxidative wear and delamination. The fracture surfaces exhibited characterization of multisource and step‐profile. The fretting fatigue crack initiated at the subsurface and propagated along an inclined angle at the first stage. The fretting damage at the higher speed was more severe compared with the lower speed, which lead to a relatively shorter fatigue life. The damage morphologies of the axle in the simulation tests were in good agreement with that observed in the failure analysis on real axle.

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Section: Resultsmentioning

confidence: 99%

Section: Fractography Analysismentioning

confidence: 99%

An investigation on rotatory bending fretting fatigue damage of railway axles

Song

Shen

Lin

et al. 2013

Fatigue Fract Eng Mat Struct

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“…The effect of oxide layer on plain and fretting fatigue has been investigated by several authors: Rajasekaran et al., 23,24 Goto and Ashida 25 and Alic. 26 Goto and Ashida 25 have stated that “a natural oxide film on the contact surfaces acts as a good lubricating film during the early stages of fretting and thereafter breaks down gradually owing to repeated sliding motion.” Ramesh and Gnanamoorthy 27 also believe that during the initial contact, the presence of thin oxide layer in steel specimens reduces the friction. We must differentiate between the oxide layer generated naturally on the samples during the experiments and that produced artificially by coating methods such as anodizing.…”

Section: Discussionmentioning

confidence: 99%

Fretting and plain fatigue behavior of Al 7075-T651 at elevated temperatures

Majzoobi

Soori

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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Fretting fatigue behavior of Al 7075-T651 is investigated at temperatures of 20 ℃, 150 ℃, 250 ℃ and 350 ℃ and at different stress levels. The results show that: (a) fatigue life increases from 15% to 160% for low stresses and reduces from −20% to −40% for higher stresses and (b) fretting fatigue life increases from 155% to 290% for low stress levels and reduces from −12% to −65% for high stress levels. All life changes have been measured with respect to the lives at ambient temperature. It is believed that under low stresses, the effect of glaze oxide layer created through surface oxygen absorption prevails and gives rise to improvement of plain and fretting fatigue of material at elevated temperatures. Precipitation and solid solution hardening and good lubrication of the oxide layer are the main reasons for this improvement. For the higher stresses, 180, 200 and 280 MPa, the oxide layer breaks down and the degradation due to reduction in ultimate strength dominates the fatigue behavior of material and diminishes the fatigue lives. Fractography of specimens reveals brittle fracture mode in the fracture surface regardless of the test temperature. Optical microscopy of specimens shows more germination of precipitates at lower temperatures and shorter aging durations and more growth of precipitates for higher temperatures and longer aging durations.

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“…With consideration of dynamic stresses and strains, recall the implication of fretting wear [39] and compare this to the dynamic contact of the driving tip and slider. Specifically, the slider moves along the basement assisted by the driving tip, forming piezoelectric vibration with micrometer amplitudes both in the vertical and horizontal directions; for instance, where ripple or chevron-like marks characterize the surface [40]. Wear mechanisms of driving tips in contact with metal sliders differ from fretting wear mechanisms, however.…”

Section: T R P T Q T R P T Q T R (5)mentioning

confidence: 99%

Wear Characteristics of Metallic Counterparts under Elliptical-Locus Ultrasonic Vibration

Zhang

Wang

2016

Applied Sciences

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Wear behavior is influential to improve friction drive and wear lifespan of actuators or motors, which work at an elliptical locus vibration. Sliding wear tests of metallic friction pairs are conducted by a laboratory rig of ultrasonic vibration. Surfaces of the different metallic sliders are characterized using surface roughness, Abbott curves and fractal dimension. Results show that surface roughness is reduced to varying degrees in the metallic sliders due to ultrasonic polishing and/or micro-rolling effect. Variations in the fractal dimensions of contact surfaces are consistent with that of surface roughness. Wear traces demonstrate that plastic deformation and cracking are the primary failure modes. Where the driving tip on the slider is in intermittent contact followed by impact effects, ripples of 3~5 µm traces suggest the occurrence of fretting in duralumin sliders. Nodular cast iron showed a favorable performance during running of ultrasonic motor, exhibiting a stable output performance and durable wear life.

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Formation of fretting fatigue cracks in 7075-T7351 aluminum alloy

Cited by 30 publications

References 10 publications

An investigation on rotatory bending fretting fatigue damage of railway axles

An investigation on rotatory bending fretting fatigue damage of railway axles

Fretting and plain fatigue behavior of Al 7075-T651 at elevated temperatures

Wear Characteristics of Metallic Counterparts under Elliptical-Locus Ultrasonic Vibration

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