Phase transformations behavior in a Cu-8.0Ni-1.8Si alloy

The phase transformations behavior in a Cu-8.0Ni-1.8Si alloy after different thermal treatments was investigated using transmission electron microscopy. DO22 ordering, discontinuous precipitation and continuous precipitation were observed in the alloy. To establish the time-temperature-transformation diagram, samples with different thermal treatments were characterized by transmission electron microscopy. On the basis of SADP analysis, crystal orientations between the copper based matrix and beta-Ni3Si and delta-Ni2Si precipitates were determined as: (1 1 0)(Cu)//(1 1 0)(beta)//(2 1 (1) over bar)(delta), [1 1 (2) over bar](Cu)//[1 (1) over bar 2](beta)// [3 2 4]delta. (C) 2010 Elsevier B.V. All rights reserved.