Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: James A. Warren (Fed)

Displaying 176 - 181 of 181

Modeling Grain Boundaries Using a Phase-Field Technique

January 1, 2000

Author(s)

James A. Warren, R Kobayashi, W Carter

We propose a two dimensional phase field model or grain boundary dynamics. One dimensional analytical solutions for a stable grain boundary in a bicrystal are obtained, and equilibrium energies are computed. By comparison with microscopic models of

Simulation of the Cell to Plane Front Transition During Directional Solidification at High Velocity

April 11, 1999

Author(s)

William J. Boettinger, James A. Warren

Using the alloy phase-field method with a frozen temperature approximation, interface morphology and solute segregation patterns during directional solidification are examined near the high velocity (absolute stability) condition for planar growth. The

A Phase Field Model of the Impingement of Solidifying Particles

December 1, 1998

Author(s)

James A. Warren, W Carter, R Kobayashi

We propose a model of the impingement of solidifying crystalline particles, the ensuing grain boundary formation, and grain coarsening. This model improves upon previous theoretical descriptions of this phenomenon, in that the model has the proper behavior