Abstract
According to classical grain growth laws, grain growth is driven by the minimization of surface energy and will continue until a single grain prevails. These laws do not take into account the lattice anisotropy and the details of the microscopic rearrangement of mass between grains. Here we consider coarsening of body-centered-cubic polycrystalline materials in three dimensions using the phase field crystal model. We observe, as a function of the quenching depth, a crossover between a state where grain rotation halts and the growth stagnates and a state where grains coarsen rapidly by coalescence through rotation and alignment of the lattices of neighboring grains. We show that the grain rotation per volume change of a grain follows a power law with an exponent of -1.25. The scaling exponent is consistent with theoretical considerations based on the conservation of dislocations.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 012409 |
| Tidsskrift | Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) |
| Vol/bind | 92 |
| Udgave nummer | 1 |
| ISSN | 1539-3755 |
| DOI | |
| Status | Udgivet - 27 jul. 2015 |