Order-disorder transformation in the Ni-4.49 at.% Al alloy

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Adorno, A. T.
Garlipp, W.
Cilense, M.
Silva, RAG

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Elsevier B.V.


The order-disorder transformation in the Ni-4.49 at.% Al alloy was studied using electrical resistivity measurements, microhardness measurements, differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). The results confirmed the ordering behavior expected for Ni-Al dilute alloys and the suggested relation between resistivity changes and microhardness changes with antiferromagnetic spin ordering. The higher value obtained for the activation energy of vacancy migration was associated with a decrease in the Al concentration gradient near solute-depleted regions. (c) 2005 Elsevier B.V. All rights reserved.



electrical properties, metals and alloys, atomic order transformation

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Journal of Alloys and Compounds. Lausanne: Elsevier B.V. Sa, v. 414, n. 1-2, p. 55-59, 2006.