Abstract
Shape Memory Alloys (SMAs) are an interesting class of materials for researchers over the past few decades. With the advancement in material science and technology, more importance is given to active materials whose properties can be tailored according to the needs, enabling the development of engineered materials that are strong, lighter in weight, and occupy less volume. The shape memory alloys stand apart from the other metals in terms of the recoverable strain it can undergo upon excitation by a thermal stimulus. Due to this unique nature the SMAs possess dual functionality, wherein it poses both as a sensor as well as an actuator, and hence finds its applications in diverse fields. The current paper will give a brief introduction to the SMA and its key effects, review and discuss the different types of SMAs, their material characteristics, behavior, advantages, modeling aspects that will aid in the practical implementation of the SMAs and potential applications.
Highlights
Introduction to SMA SMA popularly known as memory alloy or smart alloy is a unique class of material capable of remembering a pre-programmed shape when excited by a thermal stimulus and interests the researchers for the past few decades [1], [2], [3]
A brief introduction to the unique class of active material SMA is given which throws light on the basic characteristics, behavior, bias force, and type of excitation required by the SMA
The SMA material properties of the most commonly used SMAs are discussed which will help in the selection of the SMA which will opt for a particular project under consideration
Summary
Introduction to SMASMA popularly known as memory alloy or smart alloy is a unique class of material capable of remembering a pre-programmed shape when excited by a thermal stimulus and interests the researchers for the past few decades [1], [2], [3]. The current paper will give a brief introduction to the SMA and its key effects, review and discuss the different types of SMAs, their material characteristics, behavior, advantages, modeling aspects that will aid in the practical implementation of the SMAs and potential applications. Paper [15] discusses the design of linear actuators using the SMA.
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