TY - JOUR

T1 - Surface preparations and durability of iron-based shape memory alloy adhesively-bonded joints

AU - Pichler, Niels

AU - Wang, Wandong

AU - Poulis, Johannes A.

AU - Ghafoori, Elyas

N1 - Funding Information: The authors would like to acknowledge the financial support of the Swiss National Foundation, SNSF, Switzerland (Grant No. 200021_192238 ), as well as Huntsmann Advanced Materials (Switzerland) GmbH, re-fer AG and Sika for providing material used for this work. Special thanks to Dr. Sofia Teixeira de Freitas, the staff of the Delft Aerospace Structures and Materials Laboratory and the DEMO University workshop for their kind support.

PY - 2023/7

Y1 - 2023/7

N2 - 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.

AB - 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.

KW - Durability

KW - Iron-based shape memory alloy

KW - Primers and coupling agents

KW - Surface treatment

UR - http://www.scopus.com/inward/record.url?scp=85164276295&partnerID=8YFLogxK

U2 - 10.1016/j.ijadhadh.2023.103439

DO - 10.1016/j.ijadhadh.2023.103439

M3 - Article

AN - SCOPUS:85164276295

VL - 125

JO - International Journal of Adhesion and Adhesives

JF - International Journal of Adhesion and Adhesives

SN - 0143-7496

M1 - 103439

ER -