PSI - Issue 69

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ScienceDirect

Procedia Structural Integrity 69 (2025) 41–46

13th European Symposium on Martensitic Transformation 2024 (ESOMAT 2024) Enhancing the functional fatigue properties of TiNbZrSn biocompatible Shape memory alloy through femtosecond laser shock peening Muhammad Asim a , Wael Abuzaid a,b *, Faisal Mustafa b , Ali S. Alnaser b,c a Department of Mechanical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates b Materials Science and Engineering Program, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab Emirates c Department of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab Emirates Abstract Shape memory alloys are among the most promising materials for the biomedical industry due to their superelasticity and shape memory effect. NiTi has been widely utilized in such applications. However, the toxicity associated with the release of Ni ions may lead to health hazards. Therefore, TiNbZrSn alloys are potential candidate materials to replace NiTi owing to their biocompatibility and superelasticity. The limitation of TiNbZrSn alloys is the functional fatigue response and the degradation of superelastic properties upon cyclic loading. This study aims to improve the functional fatigue response of the TiNbZrSn alloy via novel femtosecond Laser Shock Peening (LSP). The results depict great potential with up to 12% improvement in the superelastic recovery of strains and hindering the accumulation of plastic strains during cyclic loading with minimal surface damage. © 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: Functional fatigue; Femtosecond laser shock peening, Shape memory alloys, TiNbZrSn alloy.

* Corresponding author. Tel.: +1-309-453-2258. E-mail address: wabuzaid@aus.edu

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.2025.07.006