Nano mechanical property analysis of single crystal copper using Berkovich nano indenter and molecular dynamic simulation

Huang, Jiankang; Liu, Yulong; Yu, Xiaoquan; Huang, Yanqing; Liu, Guangyin; Huang, Zhongli; Ding, Fan

doi:10.1016/j.commatsci.2020.110237

Cited by 13 publications

(5 citation statements)

References 37 publications

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“…It is already known that crystal orientations have strong effects on deformation behavior and the underlying deformation mechanisms [19,22,40,41]. It is necessary to investigate how (CoCr) (100-x) Ni x MEAs will perform under indentation.…”

Section: Crystal Orientation Effectmentioning

confidence: 99%

“…They found that crystallographic orientations control the slip modes and stress-concentrated regions. Huang et al focused on the nanoindentation analysis of FCC single-crystal copper with different crystal orientations under the Berkovich indenter [22]. It is found that the crystal orientation has a strong influence on the dislocation distribution during indentation process and incomplete dislocation nucleations dominate the plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy

Zhang

Shi

2023

Modelling Simul. Mater. Sci. Eng.

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Nanoindentation analyses of (CoCr)100-xNix medium-entropy alloys with different Ni contents and crystal orientations were carried out by molecular dynamics simulation. Analyses show that the force-displacement curves during elastic deformation are in good accordance with the Hertz contact theory and the elastic modulus is closely related to the Ni contents and crystal orientations. The elastic-plastic transition point appears later in (CoCr)67Ni33 than in other alloys. The plastic deformation was studied by exploring the instantaneous microstructure, which was found to be dominated by homogeneous nucleation of Shockley partial dislocations and the accumulation of stacking faults, and different levels of dislocation density were produced in medium-entropy alloys with different Ni contents and crystal orientations. By analyzing the evolution of dislocation density and hardness, a linear relationship between the square root of dislocation density and hardness can be revealed, which agrees well with the classical Taylor hardening expression, and the empirical constant is found closely related to the crystal orientation.

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Section: Crystal Orientation Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy

Zhang

Shi

2023

Modelling Simul. Mater. Sci. Eng.

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“…The micro-organization of the rod and ribbons were obviously different; there was no solid solution, and the content of the quasicrystalline phase increased in the ribbons. This not only affects the bonding strength of the overall material but also leads to changes in the local crystal structure and free volume in the alloy [42][43][44][45]. The above factors may be responsible for the differences in elastic modulus.…”

Section: Nanoindentation Studymentioning

confidence: 99%

Microstructure and Nanoindentation Behavior of Ti40Zr40Ni20 Quasicrystal Alloy by Casting and Rapid Solidification

Hou

Yang

Duan

et al. 2021

Metals

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A Ti40Zr40Ni20 quasicrystal (QCs) rod and ribbons were prepared by conventional casting and rapid solidification. The X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC) techniques were used to investigate the microtissue, phase composition, and solidification features of the samples; the nano-indentation test was carried out at room temperature. The results show that a mixture of the α-Ti(Zr) phase and the icosahedral quasicrystal (I-phase) was formed in the Ti40Zr40Ni20 rod; the microstructure of Ti40Zr40Ni20 ribbons mainly consisted of the I-phase. The solidification mechanism of the I-phase was different in the two alloys. The I-phase in the quasicrystalline rod was formed by packet reaction while in the ribbons it was generated directly from the liquid. At room temperature, both samples had relatively high hardness and elastic modulus; the elastic modulus of the ribbons is 76 GPa, higher than the 45 GPa of the rod. The hardness of the ribbons was more than twice that of the rod.

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“…Atomic simulation allows capturing physical quantities such as force, stress, phase transformation, vectors, and lattice deformation during atomic motions in real-time. MD simulations are widely used to study subsurface damage, nanostructure evolution, defect nucleation, and dislocation formation at the atomic level during nano-cutting [24,25].…”

Section: Introductionmentioning

confidence: 99%

Nano-cutting mechanism of ion implantation-modified SiC: reducing subsurface damage expansion and abrasive wear

Kang,

Kong,

Chang

et al. 2024

Nanotechnology

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This study utilized ion implantation to modify the material properties of silicon carbide (SiC) to mitigate subsurface damage during SiC machining. The paper analyzed the mechanism of hydrogen ion implantation on the machining performance of SiC at the atomic scale. A molecular dynamics model of nanoscale cutting of an ion-implanted SiC workpiece using a non-rigid regular tetrakaidecahedral diamond abrasive grain was established. The study investigated the effects of ion implantation on crystal structure phase transformation, dislocation nucleation, and defect structure evolution. Results showed ion implantation modification decreased the extension depth of amorphous structures in the subsurface layer, thereby enhancing the surface and subsurface integrity of the SiC workpiece. Additionally, dislocation extension length and volume within the lattice structure were lower in the ion-implanted workpiece compared to non-implanted ones. Phase transformation, compressive pressure, and cutting stress of the lattice in the shear region per unit volume were lower in the ion-implanted workpiece than the non-implanted one. Taking the diamond abrasive grain as the research subject, the mechanism of grain wear under ion implantation was explored. Grain expansion, compression, and atomic volumetric strain wear rate were higher in the non-implanted workpiece versus implanted ones. Under shear extrusion of the SiC workpiece, dangling bonds of atoms in the diamond grain were unstable, resulting in graphitization of the diamond structure at elevated temperatures. This study established a solid theoretical and practical foundation for realizing non-destructive machining at the atomic scale, encompassing both theoretical principles and practical applications.

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Nano mechanical property analysis of single crystal copper using Berkovich nano indenter and molecular dynamic simulation

Cited by 13 publications

References 37 publications

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy

Microstructure and Nanoindentation Behavior of Ti40Zr40Ni20 Quasicrystal Alloy by Casting and Rapid Solidification

Nano-cutting mechanism of ion implantation-modified SiC: reducing subsurface damage expansion and abrasive wear

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Nano mechanical property analysis of single crystal copper using Berkovich nano indenter and molecular dynamic simulation

Cited by 13 publications

References 37 publications

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)100-x Ni x medium-entropy alloy

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)100-x Ni x medium-entropy alloy

Microstructure and Nanoindentation Behavior of Ti40Zr40Ni20 Quasicrystal Alloy by Casting and Rapid Solidification

Nano-cutting mechanism of ion implantation-modified SiC: reducing subsurface damage expansion and abrasive wear

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Product

Resources

About

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy

Effect of Ni content and crystallographic orientation on mechanical properties of single-crystal (CoCr)_100-xNi _x medium-entropy alloy