What is it about?
A shape-memory alloy is an alloy that can be deformed when cold but returns to its pre-deformed ("remembered") shape when heated. It may also be called memory metal, memory alloy, smart metal, smart alloy, or muscle wire. Parts made of shape-memory alloys can be lightweight, solid-state alternatives to conventional actuators such as hydraulic, pneumatic, and motor-based systems. They can also be used to make hermetic joints in metal tubing.
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Why is it important?
SMA has many advantages over traditional actuators, but do suffer from a series of limitations that may impede practical application. In numerous studies, it was emphasized that only a few of patented shape memory alloy applications are commercially successful due to material limitations combined with a lack of material and design knowledge and associated tools, such as improper design approaches and techniques used. The challenges in designing SMA applications are to overcome their limitations, which include a relatively small usable strain, low actuation frequency, low controllability, low accuracy, and low energy efficiency. In recent days, it is being found that shape memory alloys can be used in the medicinal field which helps to alleviate numerous disabilities in people.
Read the Original
This page is a summary of: Synthesis and Evaluation of Biocompatibility of Cu-Al-Mn Shape Memory Alloy, Materials Science Forum, August 2019, Trans Tech Publications, DOI: 10.4028/www.scientific.net/msf.969.380.
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