Computer simulation of recrystallization-I. Homogeneous nucleation and growth

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(86)90128-8· OSTI ID:7172295

Srolovitz, D J; Grest, G S; Anderson, M P

A Monte Carlo computer simulation technique in which a continuum system is modeled employing a discrete lattice has been applied to recrystallization. Primary recrystallization is modeled under conditions where the degree of stored energy is varied and nucleation occurs homogeneously. The nucleation rate is chosen as either constant or site saturated. The recrystallized volume fraction shows sigmoidal variations with time. The data are approximately fit by the Johnson-Mehl-Avrami equations; however, deviations are observed for small and large recrystallized volume fractions. Under site saturated nucleation conditions, the microstructure is initially characterized by the growth of individual recrystallized grains which grow until impingement leaving pockets of unrecrystallized grains and a bimodal grain size distribution. These pockets then recrystallize, often leaving elongated, irregular grains with a relatively homogeneous distribution of grain sizes. When nucleations occurs at a constant rate, propensity for irregular gain shapes is decreased and the density of two sided grains increases. The final recrystallized grain size (area) is proportional to the nucleation rate to the (-2/3) power.

• Research Organization: Los Alamos National Lab., Los Alamos, NM (US)
• OSTI ID: 7172295
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 34:9; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED SIMULATION
CRYSTAL GROWTH
CRYSTAL LATTICES
CRYSTAL STRUCTURE
GRAIN SIZE
MATERIALS
MICROSTRUCTURE
MONTE CARLO METHOD
NUCLEATION
RECRYSTALLIZATION
SIMULATION
SIZE
STRUCTURAL CHEMICAL ANALYSIS