Influence of subgrain boundaries on coarsening of grain structures

7th International Conference on Nanomaterials by Severe Plastic Deformation

Zöllner, D.^1 ; Skrotzki, W.^1

Institut für Strukturphysik, Technische Universität Dresden, Haeckelstraße 3, Dresden

D-01069, Germany^1

关键词: Annealing time;    Coarsening kinetics;    Individual grains;    Linear functions;    Subgrain boundaries;    Von Neumann-Mullins law;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/194/1/012049/pdf
DOI  :  10.1088/1757-899X/194/1/012049

来源: IOP

【 摘 要 】

In the present work, the influence of subgrain boundaries on the coarsening kinetics of individual grains embedded in an average environment as well as within a grain structure is investigated. It is found that a specific introduction of subgrain boundaries not only influences the speed with which grains shrink or grow, but in contrast to the von Neumann-Mullins-law, a distinct manipulation of the location of the subgrain boundaries allows even grains with few edges to grow, while grains with many edges shrink. During these circumstances one fact stays the same: the area of the individual grains is a linear function of annealing time as long as the environment does not change.