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Phase Transformation Behavior and Smart Applications of Shape Memory Alloys
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Author: Jiao Luo
Abstract: Shape memory alloys (SMAs) are unique materials that exhibit the ability to recover their original shape upon heating after being deformed at low temperatures. Due to their remarkable properties, such as high strength, excellent fatigue resistance, and the ability to undergo significant recoverable deformation, SMAs have found extensive applications in various fields, including biomedical devices, robotics, aerospace, automotive industries, and smart textiles. This paper provides a comprehensive overview of the phase transformation behavior and smart applications of SMAs, focusing on the underlying mechanisms, characteristics, and technological advancements in SMA-based devices. It explores the various phases involved in SMA behavior, including the martensitic and austenitic phases, thermoelastic transformations, and stress-induced phase transformations. Furthermore, this paper discusses the applications of SMAs in smart technologies, including their use in medical devices, actuators, sensors, and energy harvesting systems. By exploring the key factors influencing phase transformations, this study highlights the potential of SMAs in designing next-generation smart materials and systems.
Keywords: Shape Memory Alloys; Phase Transformation; Martensitic Phase; Austenitic Phase; Smart Applications; Biomedical Devices; Actuators; Sensors; Energy Harvesting
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