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Transformation sequence in severely cold-rolled and annealed Ti50Ni50 alloy

✍ Scribed by S.H. Chang; S.K. Wu; G.H. Chang

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 558 KB
Volume: 438-440
Category: Article
ISSN: 0921-5093
DOI: 10.1016/j.msea.2006.02.124

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✦ Synopsis

Transformation sequence of Ti 50 Ni 50 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.

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