A Study of the Liquid-Solid Interface during Rapid Resolidification of Cooper-Titanium Using Molecular Dynamics

Abstract

The behavior of the liquid-solid interface during resolidification of a condensed copper-titanium crystal is studied by atomistic simulation. A system of 1080 atoms (540 of each type) was simulated. The interface was created using monte carlo techniques and resolidification was performed by molecular dynamics. Resolidification was attempted at temperatures of 1200 K, 1100 K, 1000 K, 900 K, 818 K and 773 K. The liquid-solid interface was found to move only at 773 K, resulting in a chemically disordered crystal. The interface velocity observed in the simulation is 6.6 m/s which agrees well with the theoretical value of 5.5 m/ s. The low interface velocity indicates the recrystallization is governed by diffusion-limited growth.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1991
Accession Number
ADA238634

Entities

People

  • Craig L. Loisel

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Amorphous Materials
  • Computational Science
  • Computer Simulations
  • Computers
  • Crystal Growth
  • Crystal Lattices
  • Crystallization
  • Crystals
  • Diffusion Coefficient
  • Dynamics
  • Electron Density
  • Equations Of Motion
  • Materials
  • Molecular Dynamics
  • Recrystallization
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Canadian European Scientific Immigration and Epilepsy Clearance Studies
  • Combustion science or combustion engineering.
  • Powder metallurgy of Titanium alloys.