Damping Characteristics of Cold-Rolled and Annealed Equiatomic TiNi Shape Memory Alloy

Abstract:

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Damping capacity and storage modulus of cold-rolled and annealed Ti50Ni50 SMA are systematically investigated by DSC and DMA tests. The specimens annealed at 500 oC for 1 ~ 72 h and annealed at 650 oC for short time can all reach a high tan δ value and a deep storage modulus minimum during B2→R transformation. This reveals that the occurrence of R-phase can strongly soften the storage modulus and thus promote the damping capacity of Ti50Ni50 SMA. The specimens anneaed at 650 oC for longer time have a lower tan δ value due to the diminishing of R-phase formation. Therefore, a good damping capacity associated with a significant softening storage modulus can be acquired by suitably control the annealing conditions of cold-rolled Ti50Ni50 to generate adequate of R-phase premartensite.

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Periodical:

Edited by:

N. Igata and S. Takeuchi

Pages:

9-16

DOI:

10.4028/www.scientific.net/KEM.319.9

Citation:

S.H. Chang and S. K. Wu, "Damping Characteristics of Cold-Rolled and Annealed Equiatomic TiNi Shape Memory Alloy", Key Engineering Materials, Vol. 319, pp. 9-16, 2006

Online since:

September 2006

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$35.00

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