Ni-Ti-based shape memory alloy for manufacturing vibration damper of engineering structures
A memory alloy and vibration damping device technology, applied in building components, shockproof, etc., can solve the problems of irrecoverable, unpublished patents, deterioration of structural fatigue strength and vibration environment, etc.
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Embodiment 1
[0009] According to the method of the invention, the NiTi-based shape memory alloy is subjected to solid solution treatment, and its composition range is: Ni: 55.1wt%; Ti: 41.5wt%; Cr: 0.4wt%; compound rare earth RE: 0.1wt%. After 700°C solid solution heat preservation treatment for 60 minutes, and then aging treatment, the alloy will show complete nonlinear superelasticity and achieve the best superelastic performance.
[0010] The NiTi-based shape memory alloy prepared above was installed in such as figure 2 The engineering frame structure shown. When the frame vibrates, the mechanism deforms under force, and the NiTi-based shape memory alloy damping device also deforms at the same time. When the NiTi-based shape memory alloy damping device is in the nonlinear superelastic state, due to the pseudoelastic effect of the shape memory alloy, the deformation of the alloy plate will recover when the frame vibration returns to the equilibrium position in a large deformation range...
Embodiment 2
[0012] According to the method of the invention, solid solution treatment is carried out on the NiTi-based shape memory alloy, and its composition range is: Ni: 57.5wt%; Ti: 43.7wt%; Cr: 0.9wt%; compound rare earth RE: 2wt%. After 700°C solid solution heat preservation treatment for 60 minutes, and then aging treatment, the alloy will show complete nonlinear superelasticity and achieve the best superelastic performance.
[0013] The NiTi-based shape memory alloy prepared above was installed in such as figure 2 On the engineering frame structure shown, the shock absorption effect is very good.
[0014] image 3 The attenuation effect comparison of installing ordinary vibration damping device and NiTi-based memory alloy vibration damping device respectively is given. image 3 (a) shows the vibration reduction situation of ordinary vibration reduction devices, and the vibration reduction effect is obviously not good. image 3 (b) shows the vibration reduction of the NiTi-base...
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