4.7 Article

Role of temperature and preexisting dislocation network on the shock compression of copper crystals

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Engineering, Mechanical

Atomistic simulation of the shock wave in copper single crystals with pre-existing dislocation network

I. A. Bryukhanov

Summary: In molecular dynamics simulations of shock compression and spall fracture in [111] copper single crystals with pre-existing dislocations, it is found that the increase in dislocation density behind the shock wave is quadratic and independent of the initial dislocation density. Pre-existing dislocations almost do not affect the spall strength but significantly slow down the spall process, resulting in a more ductile fracture.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

Article Physics, Applied

Origins of plastic shock waves in single-crystal Cu

Y. F. Xu et al.

Summary: We investigated shock wave propagation in single-crystal Cu using molecular dynamics simulations and found a significant difference in the velocity of plastic shock waves compared to the linear shock velocity-particle velocity relation. This difference can be attributed to changes in the mechanisms of plastic shock wave generation and propagation, transitioning from a dislocation nucleation-dominant mode to an alternating nucleation and growth mode, and finally to a growth-dominant mode.

JOURNAL OF APPLIED PHYSICS (2022)

Article Engineering, Mechanical

Dislocation-dominated void nucleation in shock-spalled single crystal copper: Mechanism and anisotropy

C. Li et al.

Summary: Large-scale molecular dynamics simulations were conducted to investigate dislocation-dominated void nucleation in single crystal copper under shock loading and spall failure. The study found that the spall strength is influenced by the orientation of the crystal, with group II orientations showing the highest spall strength. The formation of stable immobile dislocations was found to play a key role in void nucleation.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

Article Materials Science, Multidisciplinary

Hugoniot elastic limit of single-crystal tantalum at normal and elevated temperatures subjected to extreme strain rates

Anuradha Singla et al.

Summary: This paper presents large-scale nonequilibrium molecular dynamic simulations of impact-induced shock propagation in defect-free single-crystal Ta along the [001] direction, focusing on the formation of elastic-plastic two-wave structures. A comprehensive study on the Hugoniot elastic limit (HEL) and its dependence on physical parameters is reported, along with wide-range scaling relations for HEL decay at ultrahigh strain rates. Additionally, the impact of lateral dimension on stress wave and free surface velocity profiles, as well as the inadequacy of commonly used methods for calculating HEL for submicron-thick samples at high strain rates, is investigated.

PHYSICAL REVIEW B (2022)

Article Chemistry, Physical

Atomistic insights into metal hardening

Luis A. Zepeda-Ruiz et al.

Summary: We demonstrated that crystal rotation leads to the staged hardening of metals, while the basic mechanisms of dislocation behavior remain consistent across all stages of metal hardening.

NATURE MATERIALS (2021)

Article Materials Science, Multidisciplinary

Role of local chemical fluctuations in the shock dynamics of medium entropy alloy CoCrNi

Zhuocheng Xie et al.

Summary: Molecular dynamics simulations were conducted to investigate the shock responses and deformation mechanisms in single crystalline and nanocrystalline microstructures of the medium entropy alloy CoCrNi. The effects of lattice distortion and chemical short-range order on shock wave propagation, defect evolution, and cavitation process were explored. Results showed that lattice distortion aids in the formation of nanotwins by slowing down dislocation propagation, while a higher degree of chemical short-range order reduces the chances for nanotwinning due to increased stacking faults annihilation.

ACTA MATERIALIA (2021)

Article Materials Science, Multidisciplinary

Dislocation-grain boundary interaction-based discrete dislocation dynamics modeling and its application to bicrystals with different misorientations

Xu Zhang et al.

Summary: This article investigates a generalized dislocation-GB interaction model and its application in nanopillars and bicrystals within a three-dimensional multiscale discrete dislocation dynamics framework. It is found that the mechanical responses of bicrystals are influenced by the GB structures and complex dislocation interactions. Furthermore, the specific events of dislocation absorption and emission, as well as the evolution of resolved shear stress and dislocation density, are found to be independent of GB misorientation angles or GB strength.

ACTA MATERIALIA (2021)

Article Materials Science, Multidisciplinary

Collapse of stacking fault tetrahedron and dislocation evolution in copper under shock compression

Qi Zhu et al.

Summary: This study investigates the collapse of stacking fault tetrahedron (SFT) and subsequent dislocation evolution in single crystal copper under shock compression using molecular dynamics simulations. The results show the collapse pattern and shock orientation dependence of SFT, as well as the relationship between shock intensity and dislocation density. Increasing shock intensity leads to a more rapid increase in dislocation density and structural transformation of SFT. Additionally, higher initial temperatures result in a decrease in critical stress for plastic deformation and thermal fluctuation impacts the decomposition of stacking faults.

JOURNAL OF NUCLEAR MATERIALS (2021)

Article Materials Science, Multidisciplinary

Shock responses of nanoporous copper with helium doping by molecular dynamics simulations

Xin-Xin Wang et al.

Summary: The study shows that helium doping affects the compression ratio and shock wave propagation speed of nanoporous copper, leading to internal helium jets and the formation of a helium shock wave during collapse of helium-doped voids. Surface damage in nanoporous copper is influenced by helium doping when the atomic ratio of He-vacancy >5%, making it more difficult to form ejecta under high speed impact.

COMPUTATIONAL MATERIALS SCIENCE (2021)

Article Materials Science, Multidisciplinary

Shock response and defect evolution of copper single crystals at room and elevated temperatures

Qi-Lin Xiong et al.

Summary: The shock compression behaviors of copper single crystals at room and elevated temperatures were investigated through molecular dynamics simulations. Results showed that increasing initial temperature affects stress through changes in kinetic and potential energy, as well as shear strain, defect density, and temperature rise. The effect of initial temperature on shock response and quasi-static compression behavior was analyzed in detail.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2021)

Article Chemistry, Multidisciplinary

Spallation Characteristics of Single Crystal Aluminum with Copper Nanoparticles Based on Atomistic Simulations

Dong-Dong Jiang et al.

Summary: This study investigates the effects of Cu nanoparticle inclusion on the dynamic responses of single crystal Al during shockwave loading and spallation processes through molecular dynamics simulations. The inclusion of Cu in Al-Cu nanocomposite results in a lower spall strength compared to ideal single crystal Al at specific impact velocities, due to the formation of a regular stacking fault structure. Additionally, the damage evolution process shows that voids tend to nucleate and grow along the inclusion interface when the piston velocity is within a certain range.

NANOMATERIALS (2021)

Article Physics, Applied

Role of pre-existing dislocations on the shock compression and spall behavior in single-crystal copper at atomic scales

Ke Ma et al.

Summary: The study found that pre-existing dislocation loops in single-crystal Cu systems result in decreased shock wave velocity and a substantial decay of the Hugoniot elastic limit (HEL) values, but also increase spall strength. The decay behavior of HEL values and the power-law dependence of the number of voids on shock propagation distance and initial dislocation density were observed.

JOURNAL OF APPLIED PHYSICS (2021)

Article Engineering, Mechanical

Dislocation drag and its influence on elastic precursor decay

Daniel N. Blaschke et al.

Summary: The translation mainly discusses the influence of dislocations on plastic deformation and the importance of accurately modeling dislocation drag and dislocation density evolution under high stress conditions. On one hand, dislocation drag is modeled based on first principles derivation, with its dependence on stress and dislocation character; on the other hand, much less is known about dislocation density evolution, leading to greater uncertainty in model parameters.

INTERNATIONAL JOURNAL OF PLASTICITY (2021)

Article Mechanics

Application of Neural Networks for Modeling Shock-Wave Processes in Aluminum

N. A. Gracheva et al.

Summary: A technique has been developed using artificial neural networks to describe the relationship between stresses, strains, and the onset of plastic flow in metal single crystals. The datasets for training are generated using molecular dynamics modeling, showing promising results in simulating shock wave propagation and studying dislocation nucleation.

MECHANICS OF SOLIDS (2021)

Article Engineering, Mechanical

Prediction of the shear strength of aluminum with 0 phase inclusions based on precipitate statistics, dislocation and molecular dynamics

Vasilii S. Krasnikov et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Article Materials Science, Multidisciplinary

Atomistic deformation behavior of single and twin crystalline Cu nanopillars with preexisting dislocations

Won-Seok Ko et al.

ACTA MATERIALIA (2020)

Article Physics, Multidisciplinary

Selective excitation of two-wave structure depending on crystal orientation under shock compression

QiLin Xiong et al.

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY (2020)

Article Thermodynamics

Shock-induced plasticity and damage in single-crystalline Cu at elevated temperatures by molecular dynamics simulations

Xia Tian et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

Article Engineering, Mechanical

Dynamics of edge dislocation in Cu-Ni solid solution alloys at atomic scale

I. A. Bryukhanov

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Article Engineering, Mechanical

Dislocation dynamics in aluminum containing θ′ phase: Atomistic simulation and continuum modeling

Vasiliy S. Krasnikov et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2019)

Article Materials Science, Multidisciplinary

Atomistic survey of grain boundary-dislocation interactions in FCC nickel

Devin W. Adams et al.

COMPUTATIONAL MATERIALS SCIENCE (2019)

Article Nanoscience & Nanotechnology

Shock wave determination of the strengthening of commercial aluminum alloy 6061 by point defects

E. B. Zaretsky et al.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2019)

Article Physics, Applied

Elastic precursor wave decay in shock-compressed aluminum over a wide range of temperature

Ryan A. Austin

JOURNAL OF APPLIED PHYSICS (2018)

Article Physics, Applied

Abnormal temperature effects on the dynamic yield stress of alpha-brass

E. B. Zaretsky et al.

JOURNAL OF APPLIED PHYSICS (2018)

Article Engineering, Mechanical

The effect of temperature on the elastic precursor decay in shock loaded FCC aluminium and BCC iron

B. Gurrutxaga-Lerma et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2017)

Article Materials Science, Multidisciplinary

Evolution of dislocation mechanisms in single-crystal Cu under shock loading in different directions

Anupam Neogi et al.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2017)

Article Multidisciplinary Sciences

Probing the limits of metal plasticity with molecular dynamics simulations

Luis A. Zepeda-Ruiz et al.

NATURE (2017)

Article Materials Science, Multidisciplinary

A molecular dynamics study of the shock-induced defect microstructure in single crystal Cu

Peng Wen et al.

COMPUTATIONAL MATERIALS SCIENCE (2016)

Article Physics, Applied

Dislocation evolution and peak spall strengths in single crystal and nanocrystalline Cu

Karoon Mackenchery et al.

JOURNAL OF APPLIED PHYSICS (2016)

Article Physics, Multidisciplinary

Attenuation of the Dynamic Yield Point of Shocked Aluminum Using Elastodynamic Simulations of Dislocation Dynamics

Benat Gurrutxaga-Lerma et al.

PHYSICAL REVIEW LETTERS (2015)

Article Materials Science, Multidisciplinary

Anisotropic shock response of titanium: Reorientation and transformation mechanisms

Hongxiang Zong et al.

ACTA MATERIALIA (2014)

Article Materials Science, Multidisciplinary

Computational Analysis Methods in Atomistic Modeling of Crystals

Alexander Stukowski

Article Materials Science, Multidisciplinary

Effects of orientation and vacancy defects on the shock Hugoniot behavior and spallation of single-crystal copper

Enqiang Lin et al.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2014)

Proceedings Paper Physics, Applied

Evolution of elastic precursor and plastic shock wave in copper via molecular dynamics simulations

Romain Perriot et al.

18TH APS-SCCM AND 24TH AIRAPT, PTS 1-19 (2014)

Article Physics, Applied

Response of copper to shock-wave loading at temperatures up to the melting point

E. B. Zaretsky et al.

JOURNAL OF APPLIED PHYSICS (2013)

Article Materials Science, Multidisciplinary

Automated identification and indexing of dislocations in crystal interfaces

Alexander Stukowski et al.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2012)

Article Engineering, Mechanical

A dislocation-based constitutive model for viscoplastic deformation of fcc metals at very high strain rates

Ryan A. Austin et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2011)

Article Materials Science, Multidisciplinary

Visualization and analysis of atomistic simulation data with OVITO-the Open Visualization Tool

Alexander Stukowski

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2010)

Article Mathematics, Applied

VORO plus plus : A three-dimensional Voronoi cell library in C plus

Chris H. Rycroft

Article Materials Science, Multidisciplinary

Molecular dynamics simulations of shock compression of nickel: From monocrystals to nanocrystals

H. N. Jarmakani et al.

ACTA MATERIALIA (2008)

Article Physics, Multidisciplinary

Dislocation nucleation in shocked fcc solids: Effects of temperature and preexisting voids

T Hatano

PHYSICAL REVIEW LETTERS (2004)

Article Physics, Applied

Atomistic shock Hugoniot simulation of single-crystal copper

EM Bringa et al.

JOURNAL OF APPLIED PHYSICS (2004)