On the Damping Behaviour of Niti Shape Memory Alloy

Yehan Liu , J. van Humbeeck

Shape memory alloys exhibit a high damping capacity in the martensite state. Results obtained from both DMA and cyclic tests under tension-compression load show that the martensite damping capacity in NiTi SMAs is a function of both strain amplitude and annealing temperature. Internal friction due to movements of martensite twin boundaries within both elastic (accommodation) and inelastic (reorientation) ranges as a function of strain amplitude seems to be consistent. A critical annealing temperature exists for deformed NiTi SMAs in order to obtain a high martensite damping capacity. Under tension-compression cyclic loading, the martensite damping decreases as the number of cycles increases, and it tends to stabilize with further cycling.

Domaines: Articles anciens

Yehan Liu, J. van Humbeeck. On the Damping Behaviour of Niti Shape Memory Alloy. Journal de Physique IV Proceedings, 1997, 07 (C5), pp.C5-519-C5-524. ⟨10.1051/jp4:1997582⟩. ⟨jpa-00255682⟩