Computational investigation on the surface cutting of γ-TiAl alloy

Jiang, J.R.; Dong, Zhaowei; Ma, Hongwei; Sun, Lihui

doi:10.1016/j.ssc.2021.114618

Cited by 7 publications

(2 citation statements)

References 45 publications

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“…Feng et al [13] conducted MD simulation on nanoscale cutting of single crystal γ-TiAl alloy, and studied the influence of random surface roughness on subsequent nanoscale cutting, finding that surface roughness has a greater impact on workpiece nano-cutting, and the tool with negative rake Angle has more defects in the cutting process. Jiang et al [14] used MD simulation to investigate the relationship between operating parameters (cutting speed and depth) and surface structures at the atomic scale. It is found that material removal of γ-TiAl alloy workpiece is dominated by the extrusion and shearing between cutting tool and workpiece.…”

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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“…Tool cutting performance has a great impact on tool life, material removal efficiency, machining surface quality [7], and the advantages and disadvantages of tool cutting performance depend on the tool material, the geometry of the cutting part of the tool and the structure of the tool [8][9][10]. In recent years, domestic and foreign scholars have carried out a large number of experimental studies and simulations on single and polycrystalline metal material cutting, including the study of cutting process parameters [11][12][13], tool geometry parameters [14,15], cutting temperature [16], grain boundaries [17], grain size [18][19][20] and so on. Guo et al used MD simulation to study the effect of process parameters on the cutting process of polycrystalline γ-TiAl alloy workpieces, and concluded that the average cutting force and friction coefficient increase with the increase of the depth of cut; increasing the cutting speed will induce amorphization of the material and plastic side flow, leading to a significant increase in the contour peaks on both sides of the machined surface [21].…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of the effect of tool parameters on nano-cutting of polycrystalline γ-TiAl alloys

Zhou,

Cao,

Zhou

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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As one of the most promising lightweight high -temperature structural materials in the future, the surface quality of γ-TiAl alloys has a great influence on the performance of the workpieces, and the tool parameters are an important factor affecting the machining results. In this study, molecular dynamics (MD) simulations of the nano -cutting process of polycrystalline γ TiAl alloys with different tool parameters were carried out.- The results show that increasing the tool rake angle and decreasing the tool edge radius within a certain range helps to reduce the average cutting force , cutting force fluctuation, cutting temperature, and stabilize the cutting process, while the change of the tool clearance angle has less influence on the cutting process. in contrast, negative rake angle cutting is more likely to produce grain rotation and grain boundary steps in the processed substrate and increase the processed surface roughness than positive rake angle cutting; increasing the tool rake angle within a certain range will weaken the elastic recovery effect of the substrate . During cutting at a positive rake angle, whether a portion of the substrate is prone to slip toward the surface of the substrate, thereby reducing the surface quality, depends on the relative state of grain orientation and force applied in the substrate.

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Influence mechanisms of tool geometry parameters on surface quality and subsurface damage in polycrystalline NiFeCr superalloys

Jiang

Sun

et al. 2023

Int J Adv Manuf Technol

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Computational investigation on the surface cutting of γ-TiAl alloy

Cited by 7 publications

References 45 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

Molecular dynamics simulation of the effect of tool parameters on nano-cutting of polycrystalline γ-TiAl alloys

Influence mechanisms of tool geometry parameters on surface quality and subsurface damage in polycrystalline NiFeCr superalloys

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