Transformation sequence in severely cold-rolled and annealed Ti50Ni50 alloy

Transformation sequence of Ti50Ni50 shape memory alloy after 35% cold-rolling and subsequent recrystallization annealing have been investigated. Four transformation sequences of Stages I-IV on different annealing conditions are proposed. Stage I corresponds to an incomplete transformation, whereas S...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2006-11, Vol.438-440, p.509-512
Main Authors: Chang, S.H., Wu, S.K., Chang, G.H.
Format: Article
Language:English
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Summary:Transformation sequence of Ti50Ni50 shape memory alloy after 35% cold-rolling and subsequent recrystallization annealing have been investigated. Four transformation sequences of Stages I-IV on different annealing conditions are proposed. Stage I corresponds to an incomplete transformation, whereas Stage II represents the four-step MST with two large and two small peaks associated with B2 - > R- > B19'transformation of large grains in the specimen center and that of small grains near the rolling surface, respectively. Stages III and IV are the complete B2 < - > R < - > B19' and B2 < - > B19'transformation sequences, respectively.
ISSN:0921-5093
DOI:10.1016/j.msea.2006.02.124