Shape memory alloys (SMAs) are a class of functional materials with the ability to regain their original shapes after a large inelastic deformation upon external stimuli. In recent years, SMAs have been employed in many applications in different fields. Nitinol is the most widely used SMA due to its outstanding properties such as shape memory effect, superelasticity, biocompatibility, and corrosion resistance among other types of SMAs. Some efforts are also made to implement SMAs on filtration devices that require deployable structures. This motivates the authors to write a review of the recent developments in the field of SMA based filtration devices as far as the use of SMAs is concerned. The present work provides a brief overview of history and basics of SMAs. This paper then reviews and discusses the recent progress and applications of SMA based filtration devices and the challenges of these filtration devices. It is found that most devices are made of nitinol. The aim of this paper is to introduce SMA based filtration devices and promote future developments of functional filtration applications.

中文翻译：

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基于形状记忆合金的过滤装置综述

形状记忆合金（SMA）是一类功能材料，能够在外部刺激下发生较大的非弹性变形后恢复其原始形状。近年来，SMA已用于不同领域的许多应用中。镍钛诺是使用最广泛的SMA，因为它具有出色的性能，例如形状记忆效应，超弹性，生物相容性以及其他类型SMA中的耐腐蚀性。还做出了一些努力以在需要可展开结构的过滤设备上实施SMA。这促使作者就基于SMA的使用对基于SMA的过滤设备领域的最新发展进行评论。本工作简要概述了SMA的历史和基础。然后，本文回顾并讨论了基于SMA的过滤设备的最新进展和应用以及这些过滤设备的挑战。发现大多数装置由镍钛合金制成。本文的目的是介绍基于SMA的过滤设备，并促进功能性过滤应用的未来发展。