Non-Equilibrium Molecular Dynamics Simulation of the Rapid Solidification of Metals

1989 ◽  
Vol 159 ◽  
Author(s):  
Cliff F. Richardson ◽  
Paulette Clancy
Keyword(s):  
Molecular Dynamics ◽  
Picosecond Laser ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Embedded Atom Method ◽  
Embedded Atom ◽  
Non Equilibrium Molecular Dynamics ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Non Equilibrium

ABSTRACTThe ultra-rapid melting and subsequent resolidification of Embedded Atom Method models of the fcc metals copper and gold are followed using a Non-Equilibrium Molecular Dynamics computer simulation method. Results for the resolidification of an exposed (100) face of copper at room temperature are in good agreement with recent experiments using a picosecond laser. At T = 0.5 Tm, the morphology of the solid/liquid interface is shown to be similar to a Lennard-Jones model. The morphology of the crystal-vapor interface at 92% of Tm shows a significant disordering of the topmost layers. Difficulties with the EAM model for gold are observed. Comparison of the Baskes et al. and Oh and Johnson embedding functions are discussed.

A New Non-Equilibrium Molecular Dynamics Simulation Method for Rapid Solidification

1988 ◽  
Vol 100 ◽  
Author(s):  
Dhanraj K. Chokappa ◽  
Paulette Clancy
Keyword(s):  
Molecular Dynamics ◽  
Thermal Processing ◽  
Laser Annealing ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Kinetic Properties ◽  
Kinetic Information ◽  
Set Up ◽  
Non Equilibrium Molecular Dynamics ◽  
Non Equilibrium

ABSTRACTA new non-equilibrium Molecular Dynamics (NEMD) computer simulation method has been developed to study ultra-rapid melting and resolidification processes, e.g. laser annealing, ion implantation, etc. An atomic-level description of the material is combined with a new simulation technique to produce thermodynamic, structural and kinetic information as a function of time. Experimentally realistic values of the energy fluence, pulse duration and substrate temperature are used as input to the simulation. Rapid heat transfer simulating the action of the energy input is then set up allowing a complete prediction of the undercooling and associated kinetic properties. As such this new method offers the most realistic simulation model for rapid thermal processing to date.

Molecular Dynamics Simulation of Sputtering with Mmany-Body Interactions

1988 ◽  
Vol 100 ◽  
Author(s):  
Davy Y. Lo ◽  
Tom A. Tombrello ◽  
Mark H. Shapiro ◽  
Don E. Harrison
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Single Crystal ◽  
Low Energy ◽  
Dynamics Simulation ◽  
Embedded Atom Method ◽  
Many Body ◽  
Embedded Atom ◽  
Dynamics Simulations ◽  
Small Single Crystal

ABSTRACTMany-body forces obtained by the Embedded-Atom Method (EAM) [41 are incorporated into the description of low energy collisions and surface ejection processes in molecular dynamics simulations of sputtering from metal targets. Bombardments of small, single crystal Cu targets (400–500 atoms) in three different orientations ({100}, {110}, {111}) by 5 keV Ar+ ions have been simulated. The results are compared to simulations using purely pair-wise additive interactions. Significant differences in the spectra of ejected atoms are found.

scholarly journals Transport diffusivities of fluids in nanopores by non-equilibrium molecular dynamics simulation

2012 ◽  
Vol 38 (7) ◽  
pp. 540-553 ◽  
Author(s):  
Hendrik Frentrup ◽  
Carlos Avendaño ◽  
Martin Horsch ◽  
Alaaeldin Salih ◽  
Erich A. Müller
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Non Equilibrium Molecular Dynamics ◽  
Non Equilibrium

scholarly journals Molecular dynamics simulation of the solid-liquid interface migration in terbium

2018 ◽  
Vol 148 (21) ◽  
pp. 214705 ◽  
Author(s):  
M. I. Mendelev ◽  
F. Zhang ◽  
H. Song ◽  
Y. Sun ◽  
C. Z. Wang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Liquid Interface ◽  
Dynamics Simulation ◽  
Interface Migration ◽  
Solid Liquid Interface ◽  
Solid Liquid

Non-equilibrium molecular dynamics simulation as a method of calculating thermodynamic coefficients

2016 ◽  
Vol 421 ◽  
pp. 1-8 ◽  
Author(s):  
Hiroki Matsubara ◽  
Gota Kikugawa ◽  
Takeshi Bessho ◽  
Seiji Yamashita ◽  
Taku Ohara
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Non Equilibrium Molecular Dynamics ◽  
Non Equilibrium

Molecular Dynamics Simulation of Compressive Mechanical Behavior of Nanocrystalline Fe

2005 ◽  
Vol 475-479 ◽  
pp. 3291-3294
Author(s):  
Shi Fang Xiao ◽  
Yu Hu Wang
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Plastic Deformation ◽  
Deformation Process ◽  
Dynamics Simulation ◽  
Embedded Atom Method ◽  
Deformation Region ◽  
Embedded Atom ◽  
Boundary Atom ◽  
Strain Strengthening

The uniaxial compressive mechanical properties of nanocrystalline Fe are simulated with a molecular dynamics technique and the analytical embedded-atom method. An asymmetrical mechanical phenomenon between tensile and compressive process is found, and the yield stress and flow stress in compression are higher than those in tension simulations. The compressive deformation process can be described as three characteristic regions: quasi-elastic deformation, plastic flowing deformation, and strain strengthening. During the plastic flowing deformation region, the material shows very good compressive ductibility. The plastic deformation is mainly dominated by the grain boundary atom slide.

Sign in / Sign up

Export Citation Format

Share Document