Related Experiment Video
Updated: Aug 21, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Dislocation nucleation in shocked fcc solids: effects of temperature and preexisting voids
1Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
Abstract:
Quantitative behaviors of shock-induced dislocation nucleation are investigated by means of molecular dynamics simulations on fcc Lennard-Jones solids: a model argon. In perfect crystals, it is found that the Hugoniot elastic limit (HEL) is a linearly decreasing function of temperature: from near-zero to melting temperatures. In a defective crystal with a void, dislocations are found to nucleate on the void surface. Also, HEL drastically decreases to 15% of the perfect crystal when the void radius is 3.4 nanometers. The decrease of HEL becomes larger as the void radius increases, but HEL becomes insensitive to temperature.
Related Concept Videos
Imperfections in Crystal Structure: Stoichiometric Point Defects
Imperfections in Crystal Structure: Point, Line and Plane Defects
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Imperfections in Crystal Structure: Non-Stoichiometric Defects
Lattice Centering and Coordination Number
Types of Unit Cells
Imagine taking a large number of identical...

