Short-Range Atomic Ordering Accelerated by Severe Plastic Deformation in FCC Invar Fe–Ni Alloys

The deformation-enhanced atomic redistribution, i.e., accelerated ordering upon warm (573 K) and disordering upon cold (298 K) high pressure torsion, has been investigated using Mossbauer spectroscopy in the binary invar Fe100 –xNix (x = 34.2–35.5 at %) alloys. Results of deformation-induced ordering and high-energy electron irradiation have been compared.