Development of High-Entropy Shape-Memory Alloys: A Review

Abstract

High-entropy shape-memory alloys (HESMAs) exhibit unique properties, including high yield strength, a wide temperature range of phase transformation, and excellent thermal cycling stability, among others. Hence, they have broad prospects for research and application. Currently, various new high-entropy shape-memory alloys have been developed based on TiNi, Fe-based, Ti-based, and NiMn-based alloys. This article focuses on summarizing and analyzing the research status of various types of high-entropy shape-memory alloys, including their microstructure characteristics, martensitic phase transformation, and functional properties. The advantages and disadvantages of high-entropy shape-memory alloys compared to traditional shape-memory alloys are briefly discussed. Finally, based on the analysis of existing problems, future research prospects are proposed, hoping to provide assistance for the development and application of high-entropy shape-memory alloys in the future.

A Modern Approach to HEAs: From Structure to Properties and Potential Applications

“…High-entropy alloys (HEAs) have garnered significant attention in materials science due to their unique compositions and potential for exceptional mechanical properties [1][2][3][4][5]. These alloys, which consist of five or more elements in equal or nearly equal atomic ratios, were first conceptualized by Yeh et al in Taiwan in 1995, introducing a new class of materials distinguished by their simple solid-solution phases-face-centered cubic (FCC) and body-centered cubic (BCC)-and potential for intermetallic compound formation [6].…”