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Materials 2018, 11(5), 832; https://doi.org/10.3390/ma11050832

Development and Characterization of High Performance Shape Memory Alloy Coatings for Structural Aerospace Applications

1
Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
2
Department of Civil and Building Engineering, Design and Environment, University of Campania “L. Vanvitelli”, 81031 Aversa (CE), Italy
*
Author to whom correspondence should be addressed.
Received: 18 April 2018 / Revised: 8 May 2018 / Accepted: 10 May 2018 / Published: 18 May 2018
(This article belongs to the Special Issue Damage Detection and Characterization of High Performance Composites)
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Abstract

This paper presents an innovative approach, which enables control of the mechanical properties of metallic components by external stimuli to improve the mechanical behavior of aluminum structures in aeronautical applications. The approach is based on the exploitation of the shape memory effect of novel Shape Memory Alloy (SMA) coatings deposited on metallic structural components, for the purpose of relaxing the stress of underlying structures by simple heating at field-feasible temperatures, therefore enhancing their structural integrity and increasing their stiffness and rigidity while allowing them to withstand expected loading conditions safely. Numerical analysis provided an insight in the expected response of the SMA coating and of the SMA-coated element, while the dependence of alloy composition and heat treatment on the experienced shape memory effect were investigated experimentally. A two-phase process is proposed for deposition of the SMA coating in an order that induces beneficial stress relaxation to the underlying structure through the shape memory effect. View Full-Text
Keywords: shape memory alloys (SMAs); coating; Ni–Ti; dfferential scanning calorimetry (DSC); shape memory effect (SME) shape memory alloys (SMAs); coating; Ni–Ti; dfferential scanning calorimetry (DSC); shape memory effect (SME)
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Exarchos, D.A.; Dalla, P.T.; Tragazikis, I.K.; Dassios, K.G.; Zafeiropoulos, N.E.; Karabela, M.M.; De Crescenzo, C.; Karatza, D.; Musmarra, D.; Chianese, S.; Matikas, T.E. Development and Characterization of High Performance Shape Memory Alloy Coatings for Structural Aerospace Applications. Materials 2018, 11, 832.

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