Accession Number:

AD0760580

Title:

A Topological Study of Grain Growth.

Descriptive Note:

Final rept. 1 Jul 70-15 Oct 72,

Corporate Author:

FLORIDA UNIV GAINESVILLE ENGINEERING AND INDUSTRIAL EXPERIMENT STATION

Personal Author(s):

• Rhines,Frederick N.

Report Date:

1973-03-01

Pagination or Media Count:

94.0

Abstract:

The characterization of the topological properties during isothermal grain growth has made it possible, for the first time, to describe grain growth as a topological process and to define its kinetics. Grain growth has been associated with a topological change in which the average topological values per grain in the system approaching limiting values equivalent to those of a tetrakaidecahedron. Experimentally it is found that the product of the total curvature per unit volume and the surface area per unit volume maintains a constant ratio to the grain size constant. Grain growth has been described in this study as taking place in two modes steady and non-steady state. These relationships have led to the development of a new kinetic equation for grain growth. Modified author abstract

Descriptors:

• (*GRAIN STRUCTURES(METALLURGY)
• CRYSTAL GROWTH)
• SHRINKAGE
• GRAIN BOUNDARIES
• MICROSTRUCTURE
• GRAIN SIZE
• TOPOLOGY
• NETWORKS
• ALUMINUM
• COMPUTER PROGRAMS

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE