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Functional Properties of Nanostructured Ti-50.0 at % Ni Alloys Pages: 11 Published: Jan 2007
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View License Agreement Source: STP1481-EB Abstract Ti-50 at % Ni alloy wire is subjected to cold-rolling (true strain e=0.31.9) and postdeformation annealing (200700°C range). For all levels of cold work, the maxima of recovery strain and stress are obtained after annealing in the 350400°C range. For the moderately-to-high cold-worked material (e=0.30.88), this annealing leads to polygonization, while for the severely cold-worked one (e=1.9), to the material nanocrystallization (grains of 5080 nm in size). Nanocrystallized alloy generates 30 % higher recovery stresses (up to 1450 MPa) and 10 % higher completely recoverable strains (more than 8 %) as compared to the polygonized alloy, while having comparable mechanical properties in tension.
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