,Structural Evolution of Nanostructured γ-Ni-28Fe Alloy Investigated by Using the Internal Friction

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The structural evolution of nanostructured γ-Ni-28Fe alloy (n-Ni-Fe) (grain size d-30 nm), synthesized by the mechno-chemical method, was investigated by using the inteal friction technique combined with differential scanning calorimetry (DSC) in the temperature range from 300 K to 670 K. An inteal friction peak with typical characteristics of the first-order phase transition was observed in the vicinity of 620 K, which corresponds to a broad exothermic process revealed by using DSC. These results can be explained as the structural changes from the disordering to the ordering transition in the n-Ni-Fe sample.
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