Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications
High-speed actuators are greatly required in this decade due to the fast development of future technologies, such as Internet-of-Things (IoT) and robots. The ferromagnetic shape memory alloys (FSMAs), whose shape change could be driven by applying an external magnetic field, possess a rapid response...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/12/5/211 |
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| author | Wan-Ting Chiu Motoki Okuno Masaki Tahara Tomonari Inamura Hideki Hosoda |
| author_facet | Wan-Ting Chiu Motoki Okuno Masaki Tahara Tomonari Inamura Hideki Hosoda |
| author_sort | Wan-Ting Chiu |
| collection | DOAJ |
| description | High-speed actuators are greatly required in this decade due to the fast development of future technologies, such as Internet-of-Things (IoT) and robots. The ferromagnetic shape memory alloys (FSMAs), whose shape change could be driven by applying an external magnetic field, possess a rapid response. Hence, these materials are considered promising candidates for the applications of future technologies. Among the FSMAs, the Ni-Mn-Ga-based materials were chosen for their large shape deformation strain and appropriate phase transformation temperatures for near-room temperature applications. Nevertheless, it is widely known that both the intrinsic brittleness of the Ni-Mn-Ga alloy and the constraint of shape deformation strain due to the existence of grain boundaries in the polycrystal inhibit the applications. Therefore, various Ni-Mn-Ga-based composite materials were designed in this study, and their shape deformation behaviors induced by compressive or magnetic fields were examined by the in situ micro CT observations. In addition, the dependence of the martensite variant reorientation (MVR) on the crystallographic directions was also investigated. It was found that most of the MVRs are active within the magnetic field range applied in the regime of the <100><sub>p</sub>, <110><sub>p</sub>, and <111><sub>p</sub> of the single-crystal {100}<sub>p</sub> Ni-Mn-Ga cubes. |
| first_indexed | 2024-03-13T09:13:59Z |
| format | Article |
| id | doaj.art-3f0bded94dca4572a4590ce34919a49d |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-13T09:13:59Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-3f0bded94dca4572a4590ce34919a49d2023-05-26T13:20:27ZengMDPI AGActuators2076-08252023-05-011221121110.3390/act12050211Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator ApplicationsWan-Ting Chiu0Motoki Okuno1Masaki Tahara2Tomonari Inamura3Hideki Hosoda4Institute of Innovative Research (IIR), Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanInstitute of Innovative Research (IIR), Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanInstitute of Innovative Research (IIR), Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanInstitute of Innovative Research (IIR), Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanInstitute of Innovative Research (IIR), Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanHigh-speed actuators are greatly required in this decade due to the fast development of future technologies, such as Internet-of-Things (IoT) and robots. The ferromagnetic shape memory alloys (FSMAs), whose shape change could be driven by applying an external magnetic field, possess a rapid response. Hence, these materials are considered promising candidates for the applications of future technologies. Among the FSMAs, the Ni-Mn-Ga-based materials were chosen for their large shape deformation strain and appropriate phase transformation temperatures for near-room temperature applications. Nevertheless, it is widely known that both the intrinsic brittleness of the Ni-Mn-Ga alloy and the constraint of shape deformation strain due to the existence of grain boundaries in the polycrystal inhibit the applications. Therefore, various Ni-Mn-Ga-based composite materials were designed in this study, and their shape deformation behaviors induced by compressive or magnetic fields were examined by the in situ micro CT observations. In addition, the dependence of the martensite variant reorientation (MVR) on the crystallographic directions was also investigated. It was found that most of the MVRs are active within the magnetic field range applied in the regime of the <100><sub>p</sub>, <110><sub>p</sub>, and <111><sub>p</sub> of the single-crystal {100}<sub>p</sub> Ni-Mn-Ga cubes.https://www.mdpi.com/2076-0825/12/5/211compositesferromagnetic shape memory alloysmartensite variant reorientationmicro computed tomographyNi-Mn-Ga |
| spellingShingle | Wan-Ting Chiu Motoki Okuno Masaki Tahara Tomonari Inamura Hideki Hosoda Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications Actuators composites ferromagnetic shape memory alloys martensite variant reorientation micro computed tomography Ni-Mn-Ga |
| title | Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications |
| title_full | Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications |
| title_fullStr | Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications |
| title_full_unstemmed | Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications |
| title_short | Investigations of the Crystallographic Orientation on the Martensite Variant Reorientation of the Single-Crystal Ni-Mn-Ga Cube and Its Composites for Actuator Applications |
| title_sort | investigations of the crystallographic orientation on the martensite variant reorientation of the single crystal ni mn ga cube and its composites for actuator applications |
| topic | composites ferromagnetic shape memory alloys martensite variant reorientation micro computed tomography Ni-Mn-Ga |
| url | https://www.mdpi.com/2076-0825/12/5/211 |
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