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Deformation of Biomedical AuCuAl-Based Shape Memory Alloy Micropillars

Published online by Cambridge University Press:  06 March 2017

Akira Umise*
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Rui Serizawa
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Sari Yanagida
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Kenji Goto
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Masaki Tahara
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Tso Fu Mark Chang
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Tomonari Inamura
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Masato Sone
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Hideki Hosoda
Affiliation:
Laboratory for Materials and Structures (MS), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Abstract

The deformation behavior and shape recovery of an Fe-added AuCuAl shape memory alloy micropillar were investigated. XRD analysis revealed that Au-28Cu-22Al-2Fe (at.%) alloy contained a second phase which was evaluated to be α-Fe (bcc). SEM observation also confirmed the second phase at the surface of the micropillar specimen. A polycrystalline micropillar with 20 x 20 x 40μm rectangular was fabricated by a focused ion beam (FIB) system, and micro compress test was performed at room temperature. It was found that the yield stress of micropillar showed 50MPa, which must correspond to stress for inducing martensite. After the heating of the compressed micropillar, 1.75% shape recovery was recognized which is comparable to the transformation strain. Then, the Fe-added AuCuAl micropillar was concluded to possess good shape memory property, and thus this alloy may be suitable for small endovascular treatment which requires good X-ray radiography.

Type
Articles
Copyright
Copyright © Materials Research Society 2017 

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Footnotes

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Graduate students, Tokyo Institute of Technology

References

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