Molecular dynamics simulation of cutting mechanism of polycrystalline Fe-Cr-W alloy

Zhou, Tianwen; Wu, Qingtang; Shi, Guangfeng; Wang, Zezhen; Zhao, Guofa; Wu, Huan; Guo, Bo

doi:10.1080/15376494.2022.2143601

Cited by 10 publications

(2 citation statements)

References 43 publications

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“…Zhu et al [28] compared the influence of cutting parameters and tool edge radius on force, atomic accumulation and temperature, discussed the mechanisms of atomic removal and cutting surface formation, and clarified that the plastic deformation of Cu 50 Zr 50 amorphous alloy was mainly caused by the shear transition zone. Zhou et al [29,30] successively studied the effects of cutting parameters and tool geometry on force, temperature, the number of amorphous atoms and surface morphology of polycrystalline Fe-Cr-W alloy, and the research results can accelerate the development of MD machining simulation technology for polycrystalline multi-component alloys. Shi et al [31] studied the atomic accumulation, energy evolution, subsurface damage (SSD), crystal structure damage and dislocations during the grinding process of single grain polycrystalline Fe-Ni, and determined that the thickness of the damaged layer can be reduced under the condition of small grinding depth and high grinding velocity, but the crystal structure and dislocation density had a slight upward trend.…”

Section: Introductionmentioning

confidence: 99%

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

He,

Gao,

Tang

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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The effects of tool rake angle and cutting depth on cutting temperature, cutting force, friction coefficient of rake tool face, atomic accumulation of chip flow and removal, surface quality, sub-surface damage layer thickness, atomic stress, and dislocation evolution were studied by molecular dynamics simulations. The results showed that the cutting temperature was concentrated on the chip, and the chip was easy to flow out with the increase of the tool rake angle, which weakens the extrusion and shearing action of the workpiece, resulting in the gradual reduction of tangential force. The tool rake angle of 10° is beneficial to improve the surface/subsurface quality of the workpiece. The minimum root-mean-square roughness obtained was 0.73 Å. The atomic stress of the workpiece was mainly concentrated around the area of interaction with the tool, and the atoms on the finished surface underwent elastic recovery, so the atomic stress was not significant. The 1/6<112> (Shockley) dislocation density had always been in the leading position, and 1/6<112> (Shockley) dislocation was continuously synthesized and decomposed during the nano-cutting process. With the increase of cutting depth, the number of atoms removed increases rapidly, and the width of chip side flow increases, but the symmetry is weakened. The contour line map even shows deep wave valleys caused by the absence of atoms, which increases the surface roughness. Moreover, the area and depth of the atomic stress distribution in the subsurface layer increase, and the number of amorphous atoms and dislocation density increase.

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Section: Introductionmentioning

confidence: 99%

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

He,

Gao,

Tang

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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“…The parameter levels of BBD should be determined according to the single factor test of turning parameters on S a , that is, the climbing performance of parameter levels. By comparing the influence trend of turning parameters on S a , it is determined that the values of low level(21) and high level (1) of turning speed are 120 and 200 m/min respectively, the values of low level (21) and high level (1) of turning feed are 0.05 and 0.1 mm respectively, and the values of low level (21) and high level (1) of turning depth are 0.1 and 0.15 mm respectively. The specific level values of parameters of BBD are shown in Table…”

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confidence: 99%

Analysis of machined surface topography of AISI M2 in hard turning based on Box-Behnken Design

Zhou

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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The surface topography of the workpiece directly affects its service performance. In this study, CLSM and SEM are used to analyze the effects of turning speed, turning feed, and turning depth on the three dimensional topography and surface defects of the machined surface. Amplitude parameters are used to characterize the machined surface topography of hard turning. Twelve groups of single factor experiments are used to analyze the influence of turning parameters on surface topography. Based on analysis of variance (ANOVA) and 15 groups of Box-Behnken Design (BBD), whether cutting parameters have significant influence on arithmetic mean deviation ( Sa) is analyzed. A mathematical statistical model of Sa is established by Response Surface Methodology, and the effectiveness of the model is verified by 10 groups of experiments. By analyzing the research results, it can be concluded that: (1) The consistency of the surface topography of hard turning is good; (2) In the turning feed direction, the surface defects of the machined surface by hard turning include turning grooves, material side flow, adhering chips, and material surface tearing; (3) In hard turning, the most significant factor affecting the three dimensional roughness ( Sa) is the turning feed.

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Optimization of Cutting Parameters for Cubic Boron Nitride Tool Wear in Hard Turning AISI M2

Zhou,

Shi,

et al. 2023

J. of Materi Eng and Perform

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Molecular dynamics simulation of cutting mechanism of polycrystalline Fe-Cr-W alloy

Cited by 10 publications

References 43 publications

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

Analysis of machined surface topography of AISI M2 in hard turning based on Box-Behnken Design

Optimization of Cutting Parameters for Cubic Boron Nitride Tool Wear in Hard Turning AISI M2

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