Deformation behavior of bulk nanocrystalline Fe_(88)Si_(12) alloy

摘要

The deformation behavior of bulk nanocrystalline Fe_(88)Si_(12) alloy has been investigated with compression tests at different strain rates. The activity volume v* is 6b~3 which indicates that the deformation mechanism is controlled by the dislocation slip. On the other hand, the critical size of the nanocrystalline Fe_(88)Si_(12) alloy for deformation mechanism is calculated to be about 5.3 nm. It is smaller than the grain size of the nanocrystalline Fe_(88)Si_(12) alloy (10 nm), which also indicates that deformation mechanism of the nanocrystalline Fe_(88)Si_(12) alloy is controlled by the dislocation pile-up.