Effect of two-dimensional ultrasonic rolling on grain size and micro-hardness of 7075 aluminum alloy

Zheng, Junjian; Liu, Hongwei; Ren, Yuanchao; Zhu, Lei

doi:10.1007/s00170-019-04640-y

Cited by 20 publications

(3 citation statements)

References 21 publications

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“…During this process, the grains gradually refined under the influence of defect interactions [36]. The effect of grain refinement on material hardness could be analyzed by the Hall-Petch effect (equation ( 2)) [37].…”

Section: Surface Hardness and Residual Stress Of Usrp Textures With D...mentioning

confidence: 99%

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling

Wu,

Deng,

Zhang

et al. 2024

Surf. Topogr.: Metrol. Prop.

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In this paper, ultrasonic rolling textures were fabricated on 42CrMo steel substrates, and the polyphenylene sulfide-polytetrafluoroethylene/silicon dioxide (PPS-PTFE/SiO2) lubricating coatings were deposited on the textured surfaces to improve the tribological properties of the coating-substrate system. The influences of textures with different shapes (spiral, linear, wavy textures) and step distances (100, 150, 200, 250 μm) on the surface morphologies and strengthening effects of the substrates were investigated. The results showed the wavy texture with a step distance of 200 µm had the best strengthening effect, which increased the surface hardness and residual compressive stress by 126.1% and 5.1 times compared to the substrate, respectively. The influences of different textures on the friction and wear properties of lubricating coatings were studied by dry reciprocating friction testings. The results showed that the coating on the spiral textured surface with a step distance of 250 µm had the best tribological properties, and the average friction coefficient and wear rate were reduced by 45.5% and 49.5% compared to the coating on the substrate. The influence of ultrasonic rolling texture on the tribological properties of the lubricating coating was a combined result of the strengthening effect and texture structure. The strengthening effect provided a steady gain, while the texture structure provided either a gain or a deterioration.

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Section: Surface Hardness and Residual Stress Of Usrp Textures With D...mentioning

confidence: 99%

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling

Wu,

Deng,

Zhang

et al. 2024

Surf. Topogr.: Metrol. Prop.

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show abstract

“…However, they mainly focused on the processing method of material removal, but rarely on ultrasonic strengthening on the tooth surface. Simultaneously, ultrasonic rolling technology can improve the surface residual stress [15] and hardness [16] , reduce the surface roughness and refine the grain [17][18][19] . Despite its many advantages, studies on ultrasonic rolling [20][21] could not be directly applied to the strengthening on the gear surface.…”

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

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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.

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Section: Introductionmentioning

confidence: 99%

Design and Experimental Study of the Rolling Enhanced Acoustic System for Gear Tooth Surface

Yan

Zhao

2021

Preprint

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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.

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Effect of two-dimensional ultrasonic rolling on grain size and micro-hardness of 7075 aluminum alloy

Cited by 20 publications

References 21 publications

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling

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

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Effect of two-dimensional ultrasonic rolling on grain size and micro-hardness of 7075 aluminum alloy

Cited by 20 publications

References 21 publications

The tribological properties of PPS-PTFE/SiO2 coating deposited on the textured surfaces processed by ultrasonic rolling

The tribological properties of PPS-PTFE/SiO2 coating deposited on the textured surfaces processed by ultrasonic rolling

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

Contact Info

Product

Resources

About

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling

The tribological properties of PPS-PTFE/SiO₂ coating deposited on the textured surfaces processed by ultrasonic rolling