President,
Association of Shape Memory Alloys
Yuji Sutou
Titanium–nickel alloy, one of the most representative shape memory alloys, was discovered during research conducted at the U.S. Naval Research Laboratory. Its remarkable properties—returning to its original shape when heated after being deformed by external force, and exhibiting rubber-like flexibility—attracted significant attention from the very beginning. Triggered by the new-materials boom of the 1970s, research rapidly progressed, and today shape memory alloys have become indispensable not only for industrial actuators but also in the medical field, including applications such as stents, guidewires, and orthodontic wires. Quietly yet steadily, shape memory alloys have expanded their role across a wide range of fields in our daily lives.
In recent years, a wide variety of shape memory alloys have been developed, including ferromagnetic types, nickel-free types, as well as new alloys based on copper, iron, cobalt, and magnesium. Research is also advancing on alloys that can operate across a broad temperature range, from cryogenic temperatures to above room temperature, opening the door to applications in environments that were previously difficult to address. As the range of materials continues to expand, so too does the potential for new applications that were once beyond imagination.
Our association was established in October 1993, based on the Shape Memory Alloy Technology Research Cooperative, which had been founded in 1983 with support from the Ministry of International Trade and Industry (then). Under the leadership of our first Chairman, Kenichi Shimizu (1993–2005), the second Chairman, Kiyoshi Yamauchi (2005–2016), and the third Chairman, Koichi Tsuchiya (2016–2026), we have made significant contributions to the advancement of shape memory alloy science and technology and its dissemination into industry. These contributions include the development of JIS standards, the organization of training courses and symposiums, the hosting of international conferences, and the publication of books.
In the field of materials development, collaboration among people from different backgrounds—such as companies, materials manufacturers, and universities—serves as a powerful driving force for creating new technologies. Our association aims to be precisely such a place where different disciplines meet, fostering the generation of new ideas and applications. We strongly believe that these connections will become increasingly important in shaping the future of shape memory alloys.
Having recently assumed the position of Chairman, I am committed to contributing, to the best of my ability, to the further development of our association’s activities. As your support is indispensable, I sincerely ask for your continued cooperation and encouragement.