Simulation Analysis of Static Recrystallization by Molecular Automaton

Yi He,Yi Ping Xu

doi:10.4028/www.scientific.net/aef.4.86

Abstract

In this paper, people mainly take three two-dimensional arrays State, Energy and Ori (Ori is the positive integer of 1 ≤Ori≤Orimax ) to perform the molecular states and build models. According to the simulation results of molecular automaton, people have a research on the change and distribution of the grain diameter and the number of side during the process of static recrystallization, and conclude as follows, the relationship between the disappearing rate of individual deformation grain and the growth rate of individual recrystallization grain is characterized by randomness during the whole recrystallization process; the more the deformation, the smaller the mean diameter of grain is, at the finished moment of recrystallization; the grain diameters are not homogeneous during the static recrystallization process and at the finished moment of static recrystallization.

Highlights

Considering the small simulation area, people can propose the temperature distribution is even, T= 1273K, and the temperature remains unchanged in the whole static recrystallization process
When the recrystallization reaches a certain degree, the quantity of the new-deformed cores is equivalent to the quantity of the swallowed original grains, and the average grain diameter comes to stable
The more the deformation effects are, the less the average grain diameter is at the finished moment of the recrystallization

Summary

The building of molecular automaton model

People mainly take three two-dimensional arrays State, Energy and Ori (Ori is the positive integer of 1 ≤ Ori ≤ Orimax ) to illustrate the molecular states in the research models. State can record whether the molecule can be recrystallized, and the result “0” means the molecule has a deformed structure, “1” means the molecule forms the recrystallization core, and “2” means the molecule can form recrystallization through core growth. The initial grain orientation value Ori can be obtained after the different effects of the equiaxed grains deformation e. With the extending of the time step, the deformed grains can be swallowed by the new-formed recrystallization core, and at the same time, three state variables of the molecule has the corresponding change and the change is stored by the computer. People can make an analysis on the whole structure evolution according to the change of the state variables.

Simulation results and analysis

Findings

Conclusion