DESENVOLVIMENTO DO CÓDIGO COMPUTACIONAL PARA A SIMULAÇÃO DA RECRISTALIZAÇÃO EM 3D PELO MÉTODO DO AUTÔMATO CELULAR
Simulação por computador
Recristalização
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
Abstract
The mechanical properties of the metallic materials are affected strongly by
microstructure. Therefore, the control of the microstructural evolution during the
recrystallization is important to optimize the mechanical properties of the material. With
purpose of investigating the recrystallization evolution a code was developed to simulate the
recrystallization by cellular automata method. In this work, the recrystallization simulation by
cellular automata method in three dimensions was investigated. The simulated microstructural
evolution was compared in details with mathematically exact analytical theories considering
both kinetic and geometrical aspects. In this comparison expressions were used recently
obtained to describe the interface evolution between recrystallized grains. Also the parameter
of the contiguity was introduced. Very good agreement was observed between the cellular
automata simulation and the theoretical results, for random nucleation by site-saturation. After
the simulation comparison with the theoretical expressions, the cellular automata simulation
of recrystallization in three dimensions was used to investigate the effects non-random
distribution of nuclei on recrystallization. A special attention was given for the interface area
per unit of volume between recrystallized grains and the contiguity. The obtained results
confirm what Vandermeer showed recently in relation to the contiguity, that it is particularly
relevant to detect deviations from randomness. This work focuses on recrystallization but its
results can be applied the any nucleation and growth transformation.
[Texto sem Formatação]
[Texto sem Formatação]
Document type
DissertaçãoFormat
application/pdf
Subject(s)
Autômato celularSimulação por computador
Recristalização
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA