PSI - Issue 69

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ScienceDirect

Procedia Structural Integrity 69 (2025) 80–88

13th European Symposium on Martensitic Transformation 2024 (ESOMAT 2024) Characterization of Vibration Damping in Nitinol Samples Manufactured through Selective Laser Melting Diego Scaccabarozzi a , Carlo Alberto Biffi b,* , Jacopo Fiocchi b , Abdelrahman Mohamed Ragab M. Ahmed a , Marco Giovanni Corti a , Ausonio Tuissi b , Bortolino Saggin a,c a Politecnico di Milano, Polo Territoriale di Lecco, Lecco b CNR, ICMATE, Lecco c Università degli Studi di Padova, Padova Abstract This research explores the potential of 3d-printed Nitinol samples to mitigate transmitted vibration levels, aiming at the development of interface dampers for space applications. The study investigates the correlation between the measured damping behaviour of Nitinol samples, measuring the loss factor with the half-power bandwidth approach in free-constrained conditions to avoid unwanted and unpredictaqw02ble dissipation given by the constraints. Among the influencing parameters, sample printing directions and post-additive heat treatments have been investigated. Results showed that by carefully tailoring the heat treatment process, it is possible to modulate the damping properties of Nitinol parts. This opens possibilities for engineers to design and manufacture lightweight aerospace components with optimised structural properties, minimising the overall mass and enhancing vibration characteristics. Moreover, this study paves the way for further research to optimise the Selective Laser Melting (SLM) process and post-treatment procedures for Nitinol alloys. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Guest Editors

Keywords: NiTiNol, damping characterisation, interface dampers, Additive Manufacturing.

* Corresponding author. Tel.: E-mail address: diego.scaccabarozzi@polimi.it

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Guest Editors 10.1016/j.prostr.2025.07.012