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Deformation of Biomedical AuCuAl-Based Shape Memory Alloy Micropillars

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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 × 20 × 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.

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Authors and Affiliations

  1. Laboratory for Materials and Structures (MS), Japan

    Akira Umise Graduate students, Rui Serizawa Graduate students, Sari Yanagida Graduate students, Kenji Goto Graduate students, Masaki Tahara, Tso Fu Mark Chang, Tomonari Inamura, Masato Sone & Hideki Hosoda

  2. Laboratory for Future Interdisciplinary Research of Science and Technology (FIRST), Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259-R2-27, 226-8503, Nagatsuta, Midori-ku, Yokohama, Japan

    Akira Umise Graduate students, Rui Serizawa Graduate students, Sari Yanagida Graduate students, Kenji Goto Graduate students, Masaki Tahara, Tso Fu Mark Chang, Tomonari Inamura, Masato Sone & Hideki Hosoda

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  1. Akira Umise Graduate students
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  2. Rui Serizawa Graduate students
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  3. Sari Yanagida Graduate students
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  4. Kenji Goto Graduate students
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  5. Masaki Tahara
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  7. Tomonari Inamura
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  9. Hideki Hosoda
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Umise, A., Serizawa, R., Yanagida, S. et al. Deformation of Biomedical AuCuAl-Based Shape Memory Alloy Micropillars. MRS Advances 2, 1411–1415 (2017). https://doi.org/10.1557/adv.2017.244

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  • DOI: https://doi.org/10.1557/adv.2017.244

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