Internal Friction of Fe-Mn-Si-Based Shape Memory Alloys Containing Nb and C and Their Application as a Seismic Damping Material

Author:

Sawaguchi Takahiro1,Kikuchi Takehiko2,Ogawa Kazuyuki1,Yin Fu Xing1,Kajiwara Setsuo1,Kushibe Atsumichi3,Ogawa Takatoshi4

Affiliation:

1. National Institute for Materials Science

2. National Institute for Materials Science (NIMS)

3. R&D Institute Takenaka Corporation

4. Takenaka Corporation

Abstract

The damping behavior of an Fe-28Mn-6Si-5Cr-0.5NbC (mass%) shape memory alloy was measured by low cycle fatigue tests during tension-compression loadings. A remarkable damping capacity was observed above the strain amplitude of 0.1%, and the specific damping capacity (SDC) parameter reached saturation at ~ 80% above 0.4%. The reversible motion of the γ/ε interfaces is considered to dominate the cyclic deformation behavior, while the work hardening during tension-compression loading is negligible. These characteristics are favorable for seismic damping devices that protect civil structures from earthquakes.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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