Theoretical Investigation of the Displacement Burst Observed in Nanoindentation by Collective Dislocation Loops Nucleation Model
スポンサーリンク
概要
- 論文の詳細を見る
Abrupt growth of displacement observed in the relationship between indent load and indent depth in nanoindentation of crystalline materials, so-called displacement burst, has been recognized as one of the representative examples of nanoscale plastic behavior (nanoplasticity). This phenomenon corresponds to the early stage of plastic deformation and is greatly influenced by the collective dislocation emission. In the present paper a simplified model is constructed for the first displacement burst with use of the elastic theory based on both the Hertzian contact theory and the classical dislocation theory to evaluate the displacement burst in nanoindentation. The result of the analytical model for the energy equilibrium revealed that there is a strong correlation between burst width and critical indent depth that corresponds to the dislocation emission. Finally, it is shown that more than one hundred high-density dislocations are generated simultaneously and surface step corresponding to the Burgers vector of dislocation dipole of each emitted dislocation causes significant displacement burst.
- 一般社団法人 日本機械学会の論文
著者
-
Shibutani Yoji
Department Of Mechanical Engineering And Systems Osaka University
-
Tsuru Tomohito
Nuclear Science And Engineering Directorate Japan Atomic Energy Agency
-
SHIBUTANI Yoji
Department of Mechanical Engineering, Graduate School of Engineering, Osaka University
関連論文
- Influence of Size and Number of Nanocrystals on Shear Band Formation in Amorphous Alloys
- Formation of Atomistic Island in Al Film Growth by Kinetic Monte Carlo
- Enhancement of Plasticity of Highly Density-Fluctuated Cu-Zr Amorphous Alloy
- MOLECULAR DYNAMICS STUDY ON DUCTILE CRACK PROCESS : Effect of Temperature on Dislocation Nucleation
- Effects of Atomic Deviatoric Distortion on Local Glass Transition of Metallic Glasses
- Minimum Energy Motion and Core Structure of Pure Edge and Screw Dislocations in Aluminum
- High-Pressure Elasticity and Auxetic Property of α-Cristobalite
- ATOMIC-LEVEL DESCRIPTION OF MATERIAL STRENGTH OF α-Fe(Special Issue on Hierarchical Estimations of Materials Strength)
- Effects of Atomic Size for Voronoi Tessellation Technique on Binary and Ternary Systems of Metallic Glasses
- Electronic Modification of C60 Monolayers via Metal Substrates
- Numerical Analysis for Acoustic Resonance of One-Dimensional Nonlinear Elastic Bar
- Computational Studies of Voltage in RF Magnetron Discharge
- Acoustic Resonance of a Two-Dimensional Isotropic Medium Studied Using Airy Stress Function (Special Issue : Ultrasonic Electronics)
- Low Temperature Elastic Constants and Piezoelectric Coefficients of LiNbO and LiTaO : Resonant Ultrasound Spectroscopy Measurement and Lattice Dynamics Analysis (Special Issue : Ultrasonic Electronics)
- MESOSCOPIC DYNAMICS ON DISLOCATION PATTERNING IN FATIGUED MATERIAL BY CELLULAR AUTOMATA(Special Issue on Hierarchical Estimations of Materials Strength)
- Thermodynamic properties of neptunium nitride : a first principles study
- Higher Accurate Estimation of Axial and Bending Stiffnesses of Plates Clamped by Bolts
- Formation of Prismatic Dislocation Loop around a Spherical Inclusion Using Level Set Dislocation Dynamics
- Non-Destructive Observations of Internal Micro-Defects Using Scanning Electron-Induced Acoustic Microscope
- Equivalent Stiffness Evaluations of Clamped Plates in Bolted Joints under Loading
- Modeling of Heteroepitaxial Thin Film Growth by Kinetic Monte Carlo
- Dislocation Nucleation and Interaction under Nanoindentation in Single Crystalline Al and Cu: Molecular Dynamics Simulations
- Large Deformability of 2D Framed Structures Connected by Flexible Joints
- Theoretical Investigation of the Displacement Burst Observed in Nanoindentation by Collective Dislocation Loops Nucleation Model
- Hybridized Atomistic Modeling of Migration Observed on Thin Film Surface by Incident Particles
- Transfer and Incorporation of Dislocations to Σ3 Tilt Grain Boundaries under Uniaxial Compression