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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.57  No.3 (2016)  >  pp.283-293

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Design Concept and Applications of Fe–Mn–Si-Based Alloys—from Shape-Memory to Seismic Response Control

Takahiro Sawaguchi1), Tadakatsu Maruyama2), Hiroaki Otsuka2), Atsumichi Kushibe3), Yasuhiko Inoue3), Kaneaki Tsuzaki1) 4)
1) Microstructure Design Group, Structural Materials Unit, Research Center for Strategic Materials, National Institute for Materials Science 2) R&D Group, Awaji Materia Co., Ltd. 3) Research and Development Institute, Takenaka Corporation 4) Department of Mechanical Engineering, Faculty of Engineering, Kyushu University

Fe–Mn–Si-based alloys exhibit a shape-memory effect associated with deformation-induced γ → ε martensitic transformation and its reversion. The γ → ε martensitic transformation also enhances mechanical properties, such as strength, hardness, wear-resistance and low-cycle fatigue lives of the alloys. In this article, we review fundamental researches on transformation behavior, microstructural and crystallographic characteristics, and functional and mechanical properties of the Fe–Mn–Si-based alloys, and introduce various examples of their practical applications. A special emphasis is placed on their new application as architectural seismic dampers, which were developed based on a new finding of the passive two-way martensitic transformations under cyclic tensile-compressive loading.

ferrous-manganese-silicon alloy, shape-memory alloy, ε-martensite, low-cycle fatigue, architectural seismic damper, connecting device

Received: October 01, 2015
Accepted: December 21, 2015 , Published online: February 25, 2016



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