Influence of tool rotation on 3D surface topography at the nanometric scale

Ji, Chunhui; Sun, Shuangqiu; Liu, Zaiwei; Sui, Tianyi

doi:10.1080/08927022.2018.1513652

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Threedimensional measurements of the surface topography and its characterization parameters can be used to provide a more comprehensive and accurate description of the surface profile from multiple perspectives. In order to obtain more statistical information about the surface topography, two characterization parameters commonly used in height parameters are selected to assess the machined surface, namely the arithmetic mean height (Sa) and the root mean square height (Sq), whose corresponding statistical calculation expressions are shown in equations (2.1) and (2.2), respectively [26]…”

Section: Effect Of Cutting Depth On 3d Surface Topographymentioning

confidence: 99%

“…However, the exploration of surface morphology formation mechanisms and influence laws at the nanoscale, which is often carried out using MD simulation methods. Ji et al investigated the effect of tool rotation on the three-dimensional surface topography of nano-cutting by MD simulation methods and established criteria for the evaluation of surface roughness parameters using the least squares mean method [26]. Liu et al presented for the first time a theoretical model of the micron and nanoscale scratch mechanism based on the removal behavior of face-centered cubic (FCC) metallic materials in micron-scale and nanoscale scratches [27].…”

Section: Introductionmentioning

confidence: 99%

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Atomic simulation for the effect of nano-cutting parameters on the 3D surface morphology of polycrystalline γ-TiAl alloy

Guo¹,

Cao²,

Fu³

et al. 2023

Modelling Simul. Mater. Sci. Eng.

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γ-TiAl alloy is one of the most potentially lightweight and high-temperature structural materials, and its machined surface quality has a significant effect on member service performance. Despite the extensive research on plastic removal and defect evolution under different cutting parameters, the forming mechanism of surface topography is not perfect under different cutting parameters. It is necessary to study the variation law of surface topography under the influence of different cutting parameters from the atomic scale. To this end, the influence of cutting depths and cutting speeds on the machined surface topography is investigated during nano-cutting of polycrystalline γ-TiAl alloys based on molecular dynamics simulation methods, and the effect of defective grain boundaries on cutting force fluctuations is analyzed. The results show that the effect of grain boundary on material deformation and dislocation obstruction is the main reason for the peak cutting force; with the increase of cutting depth, the average cutting force and friction coefficient increase, and both Sa and Sq show an increasing trend, which is the result of the joint action of plowing effect and grain boundary distribution; Sa and Sq show a decreasing and then increasing trend with the increase of cutting speed, and the critical cutting speed is 200m/s. This indicates that a smaller cutting depth and an appropriately higher cutting speed can effectively improve the surface quality of the polycrystalline γ-TiAl alloy, and optimize its nano-cutting process.

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Section: Effect Of Cutting Depth On 3d Surface Topographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Atomic simulation for the effect of nano-cutting parameters on the 3D surface morphology of polycrystalline γ-TiAl alloy

Guo¹,

Cao²,

Fu³

et al. 2023

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

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Effect of UEVC parameters on cutting surface quality and subsurface damage of single crystal γ-TiAl alloy via atomic simulation

Chen,

Zhou,

Zhu

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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TiAl alloys are favored by the aerospace industry due to its excellent mechanical properties. However，its intrinsic brittleness, the use of conventional cutting process leads to the problems of high cutting force and high cutting temperature, which in turn affects the machined surface quality. Ultrasonic elliptical vibratory cutting (UEVC) has been proved to be an effective method to improve the surface quality and reduce the subsurface damage of difficult-to-machine materials. This paper compares the effects of conventional cutting (CC) and UEVC processes on cutting forces and subsurface damage based on molecular dynamics simulation methods, and the effects of elliptical vibration frequencies and amplitude ratios on surface morphology, roughness, and subsurface damage are investigated. The results show that the cutting force and subsurface damage in the UEVC process are reduced compared with that in the CC. Due to the vibration frequency, the subsurface damage is mainly dominated by atomic clusters, and both surface and subsurface masses show an optimization trend as the vibration frequency decreases. In terms of the amplitude ratio, the surface quality is better at an amplitude ratio of 2/3, with less activation of immovable dislocations, and the degree of subsurface damage decreases as the amplitude ratio increases, and a relatively stable defective structure emerges when the amplitude ratio is 1/2. The simulation results facilitate an atomic-scale comprehension of the removal mechanism of UEVC and further provide a theoretical foundation for the surface mass and subsurface damage mechanism and optimization of vibrational parameters of UEVC single crystal γ-TiAl alloy.

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Influence of tool rotation on 3D surface topography at the nanometric scale

Cited by 2 publications

References 14 publications

Atomic simulation for the effect of nano-cutting parameters on the 3D surface morphology of polycrystalline γ-TiAl alloy

Atomic simulation for the effect of nano-cutting parameters on the 3D surface morphology of polycrystalline γ-TiAl alloy

Effect of UEVC parameters on cutting surface quality and subsurface damage of single crystal γ-TiAl alloy via atomic simulation

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