Effect of Fe Content on Steady-State Grain Size in Ni-Fe Alloys

It is widely known that a steady-state grain size dss obtained by plastic deformation varies with change in physical properties of material, such as stacking fault energy ΓSFE, shear modulus G, flow stress σ and magnitude Burgers vector b. In previous study, model has been proposed based on dislocation theory to describe the relationship between properties. For pure metals, it reported variation follows model. alloys, although effect normalized ΓSFE/Gb investigated, other not well considered. this Ni-Fe alloys were controlled changing Fe content, High-pressure torsion (HPT) straining was investigated. became finer increasing content. This study revealed decrease follow model, which suggested only but also σ/G affects alloys. presumable suppresses recovery dislocations, inverse enhances introduction dislocation, leads