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

S.H. Chang, Shi Kang Wu
2006 Key Engineering Materials  

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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
more » ... ave 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.
doi:10.4028/www.scientific.net/kem.319.9 fatcat:nlk4x334hbcgjm3axloqihkfbe
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S.H. Chang, Shi Kang Wu. "Damping Characteristics of Cold-Rolled and Annealed Equiatomic TiNi Shape Memory Alloy." Key Engineering Materials (2006) 9-16