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Surface preparations and durability of iron-based shape memory alloy adhesively-bonded joints

Journal Article (2023)
Author(s)

Niels Pichler (ETH Zürich)

Wandong Wang (Northwestern Polytechnical University)

J.A. Poulis (TU Delft - Structural Integrity & Composites)

Elyas Ghafoori (Leibniz Universität)

Research Group
Structural Integrity & Composites
Copyright
© 2023 Niels Pichler, Wandong Wang, J.A. Poulis, Elyas Ghafoori
DOI related publication
https://doi.org/10.1016/j.ijadhadh.2023.103439
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 Niels Pichler, Wandong Wang, J.A. Poulis, Elyas Ghafoori
Research Group
Structural Integrity & Composites
Volume number
125
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Abstract

Developing a bonded prestressed solution for strengthening structures utilizing an iron-based shape memory alloy (Fe-SMA), is of significant interest. This study is the first systematic investigation of adhesively-bonded Fe-SMA joints to achieve complete cohesive failure, which is an essential prerequisite for bond integrity. The Fe-SMA surface was prepared by combining UV/ozone exposure (UV), sol–gel (SG), and primers (PC, PNC), and the failure mode of the joint was investigated using the floating-roller peel test. Furthermore, the joint durability was studied through artificial aging using a salt spray cabinet. Cohesive failure was obtained for all investigated adhesives, and the effect of every surface preparation step was described. The application of sol–gel was found to be a crucial step in obtaining complete adhesive failure.