Abstract
Planetary ball milling and subsequent heat treatment were employed for the production of nano‐crystalline NiTi‐based powder from initial Ni and Ti powder mixture with stoichiometric composition of Ni50Ti50. Characterization of the crystal structure of the milled product using X‐ray diffractometry, scanning and transmission electron microscopy showed that increasing milling time decreased the particle and crystallite size but increased internal lattice strain. Milled products with nano‐crystalline NiTi and amorphous structures were detected which transformed to the dominant B2‐NiTi and minor Ni3Ti and NiTi2 crystal structures upon subsequent annealing as detected by X‐ray diffraction and differential thermal analysis.
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