Effect of different crystal orientations on the surface integrity during nanogrinding of monocrystalline nickel

Ren, Jie; Liang, Guoxing; Liu, Ming

doi:10.1088/1361-651x/ab3294

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…Yang et al [22] established a single crystal germanium nano-cutting model by MD method, studied the phase transformation and crystal structure evolution during multiple cutting, and pointed out that multiple cutting under the same machining parameters can improve the surface quality of the workpiece better than single cutting. Ren et al [23] used MD method to simulate repetitive nano-machining of single crystal nickel, analyzed cutting force, subsurface damage and surface topography during repetitive nanomachings, and found that repetitive machining at one time would reduce tool forces and improve material subsurface quality, while subsequent repetitive machining had little impact. Zhou et al [24] established the polycrystalline MD model of alloy tool steel with Fe, Cr and W to study the influence of tool geometry on the machining mechanism of alloy tool steel in the process of ultra-precision turning.…”

Section: Introductionmentioning

confidence: 99%

Effect of repetitive nano-cutting tool parameters on surface quality and subsurface damage of γ-TiAl alloy

Liu,

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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In this paper, the molecular dynamics simulation of the repeated nanocutting of single crystal γ-Tial alloy was carried out by selecting different geometric parameters of the second cutting tool by single factor experiment. The cutting force, friction coefficient, subsurface defects, dislocation evolution and surface roughness of the second cutting were analyzed systematically. The results show that when the tool rake angle is 15°, the surface roughness is lower and the surface quality is better. The influence of different second cutting tool rake angle on the surface roughness is not strong. When the rake angle of the second cutting tool and the radius of edge are constant, the average normal cutting force decreases with the increase of the clearance angle of the tool. Under the machining parameters in this paper, the critical clearance angle of the second cutting of single crystal γ-TiAl alloy is between 10° and 15°. When the tool clearance angle is greater than the critical clearance angle, the average cutting force and the machined-surface roughness no longer change significantly. With the increase of the radius of the second cutting tool, the chip decreases, the subsurface defect increases, and the surface roughness of the machined surface also increases with strong regularity.

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Section: Introductionmentioning

confidence: 99%

Effect of repetitive nano-cutting tool parameters on surface quality and subsurface damage of γ-TiAl alloy

Liu,

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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“…It was found that meeting these requirements was possible through the use of a new method and new tools. Conclusions came from the resent investigations on the features of abrasive tools [3,8,19,20], process kinematics [21], the influence of the processed material properties on the process results [22][23][24][25][26] and cutting fluid [9,27]. In the assumptions for the new method, the developed methodology of process monitoring [28,29], a thorough analysis of the properties of abrasive tools [30][31][32], and the topography of the treated surfaces [33] were used.…”

Section: Introductionmentioning

confidence: 99%

A Method and Device for Automated Grinding of Small Ceramic Elements

et al. 2021

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The paper describes an automated method for grinding small ceramic elements using a hyperboloid wheel. The problem of automating the process of machining elements made of nonmagnetic materials with a small area and low height has been solved. Automation of the grinding process was possible thanks to automatic clamping of workpieces in the machining zone and sequential processing by a specified number of grinding wheels. The workpieces were passed through successive machining zones. The division of the allowance of individual grinding wheels was made taking into account the characteristics of the workpieces and the requirements for the results of the machining. Obtaining a long grinding zone and the effect of automatic clamping of the workpieces was possible due to the inclination of the grinding wheel axis in relation to the plane of movement of the workpieces. Innovative aggregate grinding wheels were used for grinding. The aggregates containing diamond abrasive grains, connected with a metal bond, were embedded in the porous structure of the resin bond. The aggregates ensured high efficiency of grinding, and their developed surface contributed to good holding in the resin binder. The durability of grinding wheels was 64 h, which enables the machining of 76,000 ceramic elements.

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“…The increase of grinding depth and abrasive grain diameter led to an increase of stacking faults and dislocations, whereas the size of the subsurface damage layer was found to be almost unaffected by the grinding speed. The same scientific group, in a later study [ 23 ] investigated the effect of crystal orientation in the case of nanocrystalline nickel. After they carried out simulations for six different crystal orientations, they showed that burr height was minimum at (110)[

10] direction, whereas the deformed layer depth was minimum at (111)[

10] direction.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Study of the Effect of Abrasive Grains Orientation and Spacing during Nanogrinding

Karkalos

Markopoulos

2020

Micromachines

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Grinding at the nanometric level can be efficiently employed for the creation of surfaces with ultrahigh precision by removing a few atomic layers from the substrate. However, since measurements at this level are rather difficult, numerical investigation can be conducted in order to reveal the mechanisms of material removal during nanogrinding. In the present study, a Molecular Dynamics model with multiple abrasive grains is developed in order to determine the effect of spacing between the adjacent rows of abrasive grains and the effect of the rake angle of the abrasive grains on the grinding forces and temperatures, ground surface, and chip formation and also, subsurface damage of the substrate. Findings indicate that nanogrinding with abrasive grains situated in adjacent rows with spacing of 1 Å leads directly to a flat surface and the amount of material remaining between the rows of grains remains minimal for spacing values up to 5 Å. Moreover, higher negative rake angle of the grains leads to higher grinding forces and friction coefficient values over 1.0 for angles larger than −40°. At the same time, chip formation is suppressed and plastic deformation increases with larger negative rake angles, due to higher compressive action of the abrasive grains.

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Effect of different crystal orientations on the surface integrity during nanogrinding of monocrystalline nickel

Cited by 8 publications

References 27 publications

Effect of repetitive nano-cutting tool parameters on surface quality and subsurface damage of γ-TiAl alloy

Effect of repetitive nano-cutting tool parameters on surface quality and subsurface damage of γ-TiAl alloy

A Method and Device for Automated Grinding of Small Ceramic Elements

Molecular Dynamics Study of the Effect of Abrasive Grains Orientation and Spacing during Nanogrinding

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