An investigation of surface failure of surface-hardened gears by scanning electron microscopy observations

Ariura, Yasutsune; Ueno, Takahiro; Nakanishi, Toru

doi:10.1016/0043-1648(83)90134-5

Cited by 27 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using a partial factorial design method, Oila and Li [6][7] found pitting resistance was improved by reducing the surface roughness. Another study [8] confirmed that the coarse gear surface was more prone to micro-pitting.…”

Section: Introductionmentioning

confidence: 86%

See 1 more Smart Citation

Design and experimental study of the rolling-enhanced acoustic system for gear tooth surface

Jiang

Zhao

2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Parameters of gear flanks, such as roughness, hardness, and residual stress, impact their working performance. Therefore, it is essential to optimize these parameters for increasing gears' life. Thus, this study combined the meshing theory and the ultrasonic surface rolling technology, and presented an innovative design to realize ultrasonic burnishing. First， the dimensions of the ultrasonic burnishing device with two nodes integrated with a gear at the bottom were calculated using frequency equations by a numerical method. Second the correctness of the calculating results was verified by simulations and experiments. Third, the influence of the ratio between the width and diameter of the gear on the acoustic system was studied. Finally, experimental platform of the rolling enhanced acoustic system for gear tooth surface is built successfully. A series of experiments were conducted, and the results showed that the roughness decreased and the hardness and the residual stress improved. Therefore, this design provided a new theory and technology to machine complicated surfaces such as gear flanks.

show abstract

Section: Introductionmentioning

confidence: 86%

“…Ariuraetal. [2] proved that surface pits caused surface deterioration. The tooth surface needs to be smooth to avoid micropits so as to obtain better meshing characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental study of the rolling-enhanced acoustic system for gear tooth surface

Jiang

Zhao

2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…The factors that influence the severity of the surface stresses and consequently the fatigue life are diverse, primarily including the operating conditions (surface velocities, sliding direction, normal load, temperature) [1][2][3][4]15], the surface conditions (surface roughness, texture) [2,[16][17][18][19][20], and the lubricant properties (viscosity, non-Newtonian behavior) [9,20]. The other potential factors such as surface hardness [20], residual stresses [14], material micro-structures [21], and lubricant additives [20,22,23] may also affect the fatigue crack formation, while not through the direct alteration of the stress distributions.…”

Section: Introductionmentioning

confidence: 99%

Determination of the accelerated RCF operating condition of the sun-planet contact of a tractor final drive using a computational method

Wagner

2016

Meccanica

View full text Add to dashboard Cite

This study proposes a computational approach to determine the operating condition, under which the rolling contact fatigue (RCF) crack nucleation of the sun-planet mesh of a tractor final drive is accelerated. Although the experimental RCF time period can be reduced by increasing the rotational velocity, the resultant increase in the film thickness promotes the lubrication condition and thus lengthens the fatigue life. To counteract this fatigue performance variation, it is proposed to increase the lubricant temperature at the same time. In the process, the lubricant viscosity decreases and offsets lubrication film thickness increase introduced by the rotational velocity increase. A physics-based gear contact fatigue model that includes the descriptions of the mixed elastohydrodynamic lubrication, the multiaxial stresses and the multi-axial fatigue is used to quantify the impacts of the lubricant temperature and the rotational velocity on the crack formation, allowing the fine tune of the temperature and velocity parameters.

show abstract

“…This leads to stress concentrations over a narrow region and, depending on the operating conditions used, numerous micropits can initiate at the asperity level. Investigations by Ariura, et al (2) revealed that micropitting, or grey staining, causes profile degradation. Therefore, further smoothening of asperities is required for better conformability but preferably in a way that avoids the formation of micropits.…”

Section: Introductionmentioning

confidence: 99%

Effect of Running-In (Load and Speed) on Surface Characteristics of Honed Gears

Mallipeddi

Norell

Sosa

et al. 2019

Tribology Transactions

View full text Add to dashboard Cite

The initial running-in cycles alter the surface integrity characteristics and influence gear performance. This article shows how the surface characteristics of honed spur gears evolved due to the combined effect of running-in load (0.9 or 1.7 GPa) and speed (0.5 or 8.3 m/s) in Forschungsstelle fur Zahnr€ ader und Getriebebau tests. Running-in affected the surface layers to a depth of 5 mm. High running-in load promoted plastic deformation of asperities, created microstructural changes associated with surface cracks, and relaxed residual stresses. It also enhanced the amount of phosphorous from extreme pressure (EP) additives at the surface. The surface contact fatigue failurethat is, micropitting-was promoted by running-in speed rather than load.

show abstract

An investigation of surface failure of surface-hardened gears by scanning electron microscopy observations

Cited by 27 publications

References 1 publication

Design and experimental study of the rolling-enhanced acoustic system for gear tooth surface

Design and experimental study of the rolling-enhanced acoustic system for gear tooth surface

Determination of the accelerated RCF operating condition of the sun-planet contact of a tractor final drive using a computational method

Effect of Running-In (Load and Speed) on Surface Characteristics of Honed Gears

Contact Info

Product

Resources

About