Damping property of a NiTi auxetic structure fabricated through selective laser melting

The present work aims at studying the damping response of a NiTi auxetic structure fabricated through additive manufacturing. Furthermore, an electropolishing route has been accounted for improving the roughness on the external surface of the printed samples. The damping capacity of the manufactured auxetic NiTi components is evaluated through the amount of energy dissipated per cycle and through the loss factor index. Results show that the damping capacity of the auxetic NiTi cell takes advantage of electropolishing and it is superior to that of traditional materials. Particularly, a maximum dissipated energy of 55 mJ was registered in the austenite state after 10 min of electropolishing; additionally, the loss factor shows a maximum of 0.0523 in the R-phase.

Automated summary

The study aims to investigate the damping response of a NiTi auxetic structure manufactured through additive manufacturing. Electropolishing is used to improve the surface roughness of the printed samples. The damping capacity of the manufactured auxetic NiTi components is evaluated based on the energy dissipated per cycle and the loss factor index. Results show that electropolishing enhances the damping capacity of the auxetic NiTi cell, surpassing that of traditional materials. The maximum dissipated energy of 55 mJ is registered in the austenite state after 10 minutes of electropolishing, with a maximum loss factor of 0.0523 in the R-phase.