Solidification

Objectives

To develop models of solidification processes. To better understand the physics of solidification and predict the microstructures which emerge during solidification.

Problems/Issues/Challenges Addressed

During solidification complex patterns can emerge in many of the stages of the process. The solid-liquid interface can become unstable, resulting in fingers and dendrites. The solid phase has microsegregation and macrosegregation patterns. When solidifying particles collide, grain boundaries emerge. Prediction of these phenomena is desireable.

Deliverables

Technical publications outlining how to implement advanced models of solidification. Software which predicts microsegregation patterns and grain boundary formation/motion.

Likely Impacts/Consequences

Eventually, better software will impact on engineering models of solidification, and make these models more realistic.

Accomplishments and Highlights

Work featured in NATURE News and Views
Work chosen as cover figure for R. Cahn's Physical Metallurgy
Work chosen as cover figure for March, 1997 issue of Computational Materials Science

People

Nist Researchers:J.A. Warren, W. J. Boettinger, W. C. Carter, A. R. Roosen, B. T. Murray
Collaborators: R. Kobayashi