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

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.

Overview and Future Advanced Engineering Applications for Morphing Surfaces by Shape Memory Alloy Materials

“…Further studies focused on the analytical [ 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ], numerical [ 59 , 65 , 66 , 79 , 81 , 87 , 88 , 89 , 90 , 91 , 92 , 93 ], and experimental [ 54 , 59 , 65 , 66 , 78 , 79 , 80 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ] investigation of SMA-based smart structures. Indeed, SMA were used as axial [ 91 ], flexural [ 54 , 65 , 66 , 93 , 98 , 99 , 100 ], twisting [ 94 , 95 ], or non-planar [ 79 , 96 ] actuators.…”

Improving product performance by forming surface compositions from shape memory effect materials with a gradient of properties and phase transformation temperatures

“…In modern engineering, multifunctionality is a brand new requirement for competitive materials. [1][2][3][4][5] Given the crucial role of the surface layer in damage accumulation and destruction, the task of ensuring multifunctionality, as well as increasing reliability and resource, can be successfully solved at the finishing stage of processing using technologies based on the principles of layer-by-layer synthesis by means of combined, functionally oriented macro-, micro-, and nanotechnology. 5,6 To increase the reliability and operational characteristics of products, we have developed a number of devices and technologies using materials with a shape memory effect (SME): a bypass device for space lithium-ion rechargeable batteries; technology to increase the durability and life cycle of the ship's propeller blades, a composite crankshaft in which the crank cheeks with the main and crank journals are connected using material with an SME, bolted connection with material elements with an SME for working under vibration conditions, details a centrifugal pump for operation in conditions of increased abrasive wear at oil production facilities; patent No.…”

“…In modern engineering, multifunctionality is a brand new requirement for competitive materials 1–5 . Given the crucial role of the surface layer in damage accumulation and destruction, the task of ensuring multifunctionality, as well as increasing reliability and resource, can be successfully solved at the finishing stage of processing using technologies based on the principles of layer‐by‐layer synthesis by means of combined, functionally oriented macro‐, micro‐, and nanotechnology 5,6 …”

A Temperature-Dependent Model of Shape Memory Alloys Considering Tensile-Compressive Asymmetry and the Ratcheting Effect

“…Shape memory alloys (SMAs), as a new class of functional material [1][2][3][4] possessing many unique features (e.g., biocompatibility, pseudo-elasticity, and shape-memory effect), have been utilized in various fields over the last three decades, such as automotive engineering [5,6], the aerospace industry [7], robotics [8,9], medical implants [10,11], intelligent control engineering [12,13], structural reinforcement [14], and virtual reality technology [15]. In these applications, SMAs are often used as structural components and undergo repeated tensile-compressive cycles during service.…”