Abstract
In this study, various mechanical behaviors of a shape memory alloy, depending on different thermal and electrical conditions to be used in areas such as biomedical, aerospace and aeronautics. Temperature changes and length change rates under different electrical current values of a shape memory alloy named “nickel titanium”, or “nitinol” (NiTi) has been observed. It has been seen that a 0.3 mm diameter wire can generate a force of 25 N while the material extends its linear measurement with a rate of 3.7 mm/s. It is observed that, under diverse constant electrical current values, the displacement and temperature relations of the nickel titanium wire is varying. It has empirically been seen that the nickel titanium alloy actuators are advantageous than their alternatives in terms of the generated strength to weight ratio and shape memory alloy materials can be used as actuators in industrial and biomedical applications.
Highlights
The usage areas of Shape Memory Alloys (SMAs) are increasing day by day as a result of their superior features
As a result of internal austenite phase transform of the SMA NiTi wire, Fig. 9 shows that it can be used as a force and/or linear actuator
The behavior of the shape memory alloy nickel titanium wire under electric current was investigated by the experimental setup
Summary
The usage areas of Shape Memory Alloys (SMAs) are increasing day by day as a result of their superior features These materials are materials that have the ability to return to their real shape or size by applying an appropriate heat procedure in cases where the geometry is distorted as a result of mechanical stress (Fig 1). SMAs find wide application areas in space researches, automotive industry, microelectromechanical and biomedical applications since these materials can return to their original shape or size by implementing a suitable heating procedure if their geometry is deformed because of being under mechanical stress.
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