Computer simulation of normal grain growth

Abstract

The present theories of normal grain growth do not give an adequate description of the process as they fail to take into account the effects of retarding force and of the texture of material. In this paper we suggest the statistical approach to the problem of grain growth that has been used to study the process in material without texture. The investigation was made by computer simulation. It was found that equation D ̄ m − D ̄ 0 m = At describes the growth kinetics only in a limited number of cases. In material with an increased initial range of grain sizes the grain growth is decelerated. The limiting grain size in sheets should be larger than double sheet thickness. If grain growth kinetics can be described by equation D ̄ m − D ̄ 0 m = At the value of exponent m can be found from the slope n(m = 1 n ) of the straight line in coordinates lg D ̄ − lg t . The right value of n can be obtained from D ̄ which correspond to the relation D ̄ ⩾ α D ̄ 0 . The magnitude of α varies from 4.5 to 1.8 when m varies from 2.0 to 5.0.