Damping characteristics of as-spun and annealed Ti51Ni49 ribbons measured by dynamic mechanical analysis

This study investigates the annealing effect on the damping properties of melt-spun Ti51Ni49 ribbon by dynamic mechanical analysis (DMA). Both as-spun and 200 °C annealed Ti51Ni49 ribbons with abundant nano-sized Guinier–Preston (GP) zones exhibit conspicuous martensitic transformation internal friction (IF) peaks in DMA tests. The damping capacity of as-spun Ti51Ni49 ribbon measured by a thin film tension clamp is better than that of the bulk Ti51Ni49 specimen measured by a single cantilever clamp. The Ti51Ni49 ribbons annealed at ≥400 °C with disc-like Ti2Ni precipitates possess lower damping capacity than as-spun Ti51Ni49 ribbon and Ti51Ni49 ribbon annealed at 200 °C with plate-like GP zones.

► Ti51Ni49 ribbons with abundant GP zones exhibit a conspicuous IF peak in DMA tests.
► The damping capacity of Ti51Ni49 ribbon is better than that of the bulk specimen.
► Ti51Ni49 ribbons with disc-like Ti2Ni precipitates deteriorate the damping capacity.