Subsurface defects structural evolution in nano-cutting of single crystal copper

Wang, Quanlong; Bai, Qingshun; Chen, Jiaxuan; Sun, Yazhou; Guo, You Guang; Liang, Yingchun

doi:10.1016/j.apsusc.2015.03.061

Cited by 79 publications

(39 citation statements)

References 31 publications

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“…(8). As illustrated in Table 2, increasing the tip radius from 25 to 60 Å leads to a significant decrease in the value of W sp by about 81.5%.…”

Section: On the Correlation Between Tip Diameter Grainmentioning

confidence: 76%

“…However, most of these simulations usually adopt defect-free monocrystalline structures as the work material [3][4][5][6][7][8][9]. On the other hand, most engineering materials exist in polycrystalline forms and mechanical properties such as flow stress, yield stress and hardness of metals and alloys [10,11] dramatically scale with grain size.…”

Section: Introductionmentioning

confidence: 99%

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Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

et al. 2017

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Using embedded atom method potential, extensive large-scale molecular dynamics (MD) simulations of nanoindentation/nanoscratching of nanocrystalline (nc) iron have been carried out to explore grain size dependence of wear response. MD results show no clear dependence of the frictional and normal forces on the grain size, and the single-crystal (sc) iron has higher frictional and normal force compared to nc-samples. For all samples, the dislocation-mediated mechanism is the primary cause of plastic deformation in both nanoindentation/nanoscratch. However, secondary cooperative mechanisms are varied significantly according to grain size. Pileup formation was observed in the front of and sideways of the tool, and they exhibit strong dependence on grain orientation rather than grain size. Tip size has significant impact on nanoscratch characteristics; both frictional and normal forces monotonically increase as tip radii increase, while the friction coefficient value drops by about 38%. Additionally, the increase in scratch depth leads to an increase in frictional and normal forces as well as friction coefficient. To elucidate the relevance of indentation/scratch results with mechanical properties, uniaxial tensile test was performed for nc-samples, and the result indicates the existence of both the regular and inverse Hall-Petch relations at critical grain size of 110.9 Å . The present results suggest that indentation/scratch hardness has no apparent correlation with the mechanical properties of the substrate, whereas the plastic deformation has.

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“…(8). As illustrated in Table 2, increasing the tip radius from 25 to 60 Å leads to a significant decrease in the value of W sp by about 81.5%.…”

Section: On the Correlation Between Tip Diameter Grainmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

et al. 2017

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“…As a diagnostic parameter, good prospects for use were established at the ratio of the effective amplitudes of the VA signals taken in the high-frequency and lowfrequency ranges, which reflect the shape distortion of this signal spectrum Further VA monitoring can be obtained for monitoring operations related to nano-cutting [15], where the state of the surface layer plays a decisive role.…”

Section: Resultsmentioning

confidence: 99%

Monitoring of the stress-strain state of the surface layer of a part in the cutting process using vibroacoustic diagnostics

2017

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Abstract. The state of the surface layer after mechanical process influences on the performance characteristics of the parts: corrosion and fatigue resistance, dimensional stability during the operating time. The wear of tools can have a decisive influence on the surface deformation. The present paper is devoted to monitoring the influence of wear on the surface layer using the analysis of vibration signals.

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“…The prismatic dislocation loop is composed of four dislocation slip plane along {111} slip system of single crystal copper. The stair-rod dislocation is formed at the interface of two stacking faults, which is induced by a cross-slip of the screw dislocation [35] . The atomic cluster is originated from a vacancy defect and is formed by the shear-slip action of the cutting tool.…”

Section: Dislocation Nucleation and Local Atomic Structure Transformamentioning

confidence: 99%

Stress-induced formation mechanism of stacking fault tetrahedra in nano-cutting of single crystal copper

Wang

Bai

Chen

et al. 2015

Applied Surface Science

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Subsurface defects structural evolution in nano-cutting of single crystal copper

Cited by 79 publications

References 31 publications

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

Monitoring of the stress-strain state of the surface layer of a part in the cutting process using vibroacoustic diagnostics

Stress-induced formation mechanism of stacking fault tetrahedra in nano-cutting of single crystal copper

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