Abstract
Amorphization and crystallization behavior of an equiatomic Ti−Ni alloy have been investigated by means of differential scanning calorimetry, X-ray diffraction, optical microscopy and transmission electron microscopy. Amorphous phases were induced by cold working, and their morphologies changed from domain like shape to band shape with increasing the amount of cold working. Volume fraction of amorphous phase increased from 17 to 43% with increasing working ratio from 30 to 70%. With increasing the amount of cold rolling from 30 to 70%, the crystallization temperature increased from 552 to 539 K and enthalpy changes associated with crystallization increased from 170 to 447 J/mol. The average grain size of the 40% cold rolled alloy increased from 27 to 80 nm with increasing annealing temperature from 573 to 673 K.
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