Surface preparations and durability of iron-based shape memory alloy adhesively-bonded joints
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 prere...
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Published in | International journal of adhesion and adhesives Vol. 125; p. 103439 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.07.2023
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Subjects | |
Online Access | Get full text |
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Summary: | 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.
•Surface preparations for adhesive bonding of a new Fe-SMA are tested.•Cohesive failure is obtained for four different adhesives.•A primer and its non-chromatic alternative are tested and found to be equivalent.•Sol-gel is identified to be crucial for achieving cohesive failure with Fe-SMA. |
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ISSN: | 0143-7496 1879-0127 |
DOI: | 10.1016/j.ijadhadh.2023.103439 |